Stethoscope. com uses industry standard SSL technology to protect your information. More Info. We Accept.

Looking for a stethoscope? You have come to the right place. Stethoscope. com sells all the major brands. 3M Littmann®, Welch Allyn Tycos, ADC, Heine, and more. Not finding what you need? Call us at us. and we can help.

The stethoscope (from Greek στηθοσκόπιο, of στήθος, stéthos - chest and σκοπή, skopé - examination) is an acoustic medical device for auscultation, or listening to the internal sounds of an animal body. It is most often used to listen to heart sounds and breathing. It is also used to listen to intestines and blood flow in arteries and veins. Less commonly, "mechanic's stethoscopes" are used to listen to internal sounds made by machines, such as diagnosing a malfunctioning automobile engine by listening to the sounds of its internal parts. Stethoscopes can also be used to check scientific vacuum chambers for leaks, and for various other small-scale acoustic monitoring tasks.

The stethoscope was invented in France in 1816 by René-Théophile-Hyacinthe Laennec at the Necker-Enfants Malades Hospital in Paris.

It consisted of a wooden tube and was monaural. His device was similar to the common ear trumpet, a historical form of hearing aid. indeed, his invention was almost indistinguishable in structure and function from the trumpet, which was commonly called a "microphone." In 1851 Arthur Leared invented a binaural stethoscope, and in 1852 George Cammann perfected the design of the instrument for commercial production, which has become the standard ever since. Cammann also authored a major treatise on diagnosis by auscultation, which the refined binaural stethoscope made possible. By 1873, there were descriptions of a differential stethoscope that could connect to slightly different locations to create a slight stereo effect, though this did not become a standard tool in clinical practice. Rappaport and Sprague designed a new stethoscope in the 1940s which became the standard by which other stethoscopes are measured. The Rappaport-Sprague was later made by Hewlett-Packard. HP's medical products division was spun off as Agilent Technologies, Inc. Agilent was purchased by Philips which became Philips Medical Systems, before the walnut-boxed, $300, original Rappaport-Sprague stethoscope was finally abandoned ca. 2004, along with Philips' brand (manufactured by Andromed, of Montreal, Canada) electronic stethoscope model. Today there are still cardiologists who consider the original Rappaport-Sprague to be the finest acoustic stethoscope. Rappaport-Sprague copies made in China currently retail for about US$20.00. The Rappaport-Sprague model stethoscope was heavy and short (18"-24") with an antiquated appearance recognizable by their two large independent latex rubber tubes connecting an exposed-leaf-spring-joined-pair of opposing "f"-shaped chrome-plated brass binaural ear tubes with a dual-head chest piece. The stethoscope tubes are held together somewhat by two clips.

Several other minor refinements were made to stethoscopes, until in the early 1960s Dr. David Littmann, a Harvard Medical School professor, created a new stethoscope that was lighter than previous models and had improved acoustics.

In the late 1970s 3M-Littmann introduced the tunable diaphragm. a very hard (G-10) glass-epoxy resin diaphragm member with an overmolded silicone flexible acoustic surround which permitted increased excursion of the diaphragm member in a "z"-axis with respect to the plane of the sound collecting area. The left shift to a lower resonant frequency increases the volume of some low frequency sounds due to the longer waves propagated by the increased excursion of the hard diaphragm member suspended in the concentric acountic surround. Conversely, restricting excursion of the diaphragm by pressing the stethoscope diaphragm surface firmly against the anatomical area overlying the physiological sounds of interest, the acoustic surround could also be used to dampen excursion of the diaphragm in response to "z"-axis pressure against a concentric fret. This raises the frequency bias by shortening the wavelength to auscultate a higher range of physiological sounds. 3-M Littmann is also credited with a collapsible mold frame for sludge molding a single column bifurcating stethoscope tube

With an internal septum dividing the single column stethoscope tube into discrete left and right binaural channels (AKA "cardiology tubing". including a covered, or internal leaf spring-binaural ear tube connector). In 1999 Richard Deslauriers patented the first external noise reducing stethoscope, the DRG Puretone. It featured two parallel lumens containing two steel coils which dissipated infiltrating noise as inaudible heat energy. The steel coil "insulation" added .30lb to each stethoscope. In 2005, DRG's diagnostics division was acquired by TRIMLINE Medical Products.

Between us. Marc Werblud, a disabled paramedic/medical student created a lightweight 32" long acoustic noise cancelling stethoscope which improved sound quality, and reduced neck strain. The acoustic properties of the specific materials used to make stethoscope components were first tested to determine their 'resident frequency'. The results of individual acoustical component materials tests revealed how their collective interactions determine the instrument's dominant tonal character and frequency response of the stethoscope, yielding several high fidelity and acoustic noise cancelling stethoscope models. Some models weighed as little as 133 grams (4.7 oz) - half the weight of common cardiology stethoscopes from the 1960s and 1970s. The new models also included a unique set of stethoscope diaphragms which increased frequency response, and could be sanitarily changed for each patient. Until his death in 2007, Georgetown University Professor W. Proctor Harvey (b. 1917) was the name most synonymous with the stethoscope and considered the nation's most skilled practitioner of auscultation, the ability to detect cardiac ailments by listening to the sounds of the heart. Dr. Harvey's incredible gift was being able to make sound clinical diagnoses from basic clinical examinations and the bedside using only an acoustic stethoscope. Dr. Harvey elevated the discipline of cardiovascular diagnosis to an art form. He taught differential auscultation using classical music to train a generation of clinicians to diagnose the heart by first learning to hear the individual instrument voices within a symphony. Harvey invented acoustic stethoscopes under the Tycos brand name notably, the Harvey Triple-head. and the "stethophone," the first electronic amplification auscultation device.

Stethoscopes are often considered as a symbol of the doctor's profession, as doctors are often seen or depicted with a stethoscope hanging around their neck. Nurses, technicians, paramedics, emergency medical technicians, and other associated personnel may in some countries be trained to use stethoscopes to obtain basic vital signs and to listen to heart and lung sounds. A doctor will typically be notified for further assessment if something unusual is heard.

Acoustic stethoscopes are familiar to most people, and operate on the transmission of sound from the chest piece, via air-filled hollow tubes, to the listener's ears. The chestpiece usually consists of two sides that can be placed against the patient for sensing sound — a diaphragm (plastic disc) or bell (hollow cup). If the diaphragm is placed on the patient, body sounds vibrate the diaphragm, creating acoustic pressure waves which travel up the tubing to the listener's ears. If the bell is placed on the patient, the vibrations of the skin directly produce acoustic pressure waves traveling up to the listener's ears. The bell transmits low frequency sounds, while the diaphragm transmits higher frequency sounds. This 2-sided stethoscope was invented by Rappaport and Sprague in the early part of the 20th century. One problem with acoustic stethoscopes was that the sound level is extremely low. This problem was surmounted in 1999 with the invention of the stratified continuous (inner) lumen, and the kinetic acoustic mechanism in 2002. Acoustic stethoscopes are the most commonly used. A recent independent review evaluated 12 common acoustic stethoscopes on the basis of loudness, clarity, and ergonomics. They did acoustic laboratory testing and recorded heart sounds on volunteers. The results are listed by brand and model.

An electronic stethoscope (or stethophone) overcomes the low sound levels by electronically amplifying body sounds. However, amplification of stethoscope contact artifacts, and component cutoffs (frequency response thresholds of electronic stethoscope microphones, pre-amps, amps, and speakers) limit electronically amplified stethoscopes' overall utility by amplifying mid-range sounds, while simultaneously attenuating high- and low- frequency range sounds. Currently, a number of companies offer electronic stethoscopes, and it can be expected that within a few years, the electronic stethoscope will have eclipsed acoustic devices. Electronic stethoscopes require conversion of acoustic sound waves to electrical signals which can then be amplified and processed for optimal listening. Unlike acoustic stethoscopes, which are all based on the same physics, transducers in electronic stethoscopes vary widely. The simplest and least effective method of sound detection is achieved by placing a microphone in the chestpiece. This method suffers from ambient noise interference and has fallen out of favor. Another method, used in Welch-Allyn's Meditron stethoscope, comprises placement of a piezoelectric crystal at the head of a metal shaft, the bottom of the shaft making contact with a diaphragm. 3M also uses a piezo-electric crystal placed within foam behind a thick rubber-like diaphragm. Thinklabs' Rhythm 32 inventor, Clive Smith uses a stethoscope diaphragm with an electrically conductive inner surface to form a capacitive sensor. This diaphragm responds to sound waves identically to a conventional acoustic stethoscope, with changes in an electric field replacing changes in air pressure. This preserves the sound of an acoustic stethoscope with the benefits of amplification. Because the sounds are transmitted electronically, an electronic stethoscope can be a wireless device, can be a recording device, and can provide noise reduction, signal enhancement, and both visual and audio output. Around 2001, Stethographics introduced PC-based software which enabled a phonocardiograph, graphic representation of cardiologic and pulmonologic sounds to be generated, and interpreted according to related algorithms. All of these features are helpful for purposes of telemedicine (remote diagnosis) and teaching.

More recently, ambient noise filtering has become available in some electronic stethoscopes, with 3M's Littmann 3000 and Thinklabs ds32a offering methods for eliminating ambient noise. In acoustic stethoscopes ambient noise filtering is available in TRIMLINE Puretone (DRG, R. Deslauriers) external noise reducing models.

Some electronic stethoscopes feature direct audio output that can be used with an external recording device, such as a laptop or MP3 recorder. The same connection can be used to listen to the previously-recorded auscultation through the stethoscope headphones, allowing for more detailed study for general research as well as evaluation and consultation regarding a particular patient's condition and telemedicine, or remote diagnosis. .

A fetal stethoscope or fetoscope is an acoustic stethoscope shaped like a listening trumpet. It is placed against the abdomen of a pregnant woman to listen to the heart sounds of the fetus. The fetal stethoscope is also known as a Pinard's stethoscope or a pinard, after French obstetrician Adolphe Pinard ( us. ).

AllHeart offers Stethoscopes, Nursing Kits, and medical supplies at everyday low prices. Find the largest Stethoscope and Nurse Kit selection online.

All Digital / Electronic Stethoscopes - Littmann, Welch Allyn Master Elite (Meditron), ADC, Cardionics, Thinklabs & More!

Cardionics E-Scope Stethoscopes, Teaching Materials, Stethoscopes for the Hard of Hearing and Hearing Impaired

When you buy your stethoscope or nurse kit from AllHeart. com, buy with confidence. We have many brands and types of stethoscopes, including Littmann and Welch Allyn. Medical professionals have purchased their stethoscopes and nurse kits from us with confidence for over a decade.

Redding Medical, Inc began serving the medical community in 1975. We have worked closely with Littman to provide high quality stethoscope and blood pressure units for your hospital or lab. Our first products were earlier generations of the renowned Littmann stethoscope. Over the years, our loyal customer following of doctors and nurses has grown along with our product line, and allowed expansion into a wide range of medical equipment. We also now carry the entire line of Littmann stethoscopes including the electronic Littmann Master Cardiology Stethoscope for infant, pediatric, and veterinary disciplines. We inventory other leading medical supply and stethoscope manufacturers such as Welch Allyn, Nonin, Nellcor Puritan Bennett, Omron and others. As we have grown to serve your needs, we have always made it our number one priority to serve each customer as if they were our only customer. We offer friendly, helpful advice and useful tips, along with a huge selection of Dickies Scrubs state-of-the-art instruments at the best prices available. Our commitment to the medical services field keeps us abreast of the latest trends and developments. As a trusted Littman provider, Redding Medical provides high quality diagnostics and pulse oximiters with the high grade customer service and product dedication.

The Caretek Medical is a Chinese prime manufacturer and exporter of medical related products. We own factory SHANGHAI BOLANG MEDICAL DEVICE CO.,LTD located in Jinshan District, Shanghai, that is one of the leading manufacturer in China for various of aneroid sphygmomanometer, digital blood pressure monitor, stethoscope accessories. Our own manufacturing keeps our price competitive. She established in 1985. Our all products are produced under the certificate of ISO9002, EN ISO13485. 2000 CE. Our company registered in FDA, USA. We have been exporting our products to more than 50 countries and regions worldwide. We strive to provide quality products, which offer the latest in technological advancements,together with the highest level of customer service and support., mercury

Listening well is the key to learning. Register your medical schoolfor a free LittmannElectronic Stethoscope Model 3000.

Express yourself with a colorful Littmann Stethoscope. Choose from a variety ofchestpiece finishes and a spectrum of tubing colors

Compare Stethoscopes Compare Stethoscopes feature-by-feature with our convenient comparison tool to find the right stethoscope for you.

® Stethoscope repair and refurbishment services to ensure your equipment can keep up with your day-to-day workoad. Visit our Stethoscope Repair and Warranty page to learn more.

Tune out the room when you turn up the volume with the Littmann® Electronic Stethoscope Model 3000. Try a Free 14-day trial.

Why shop with us? Stethoscopes and medical equipment are in our warehouse, ready to ship! Over 100 stethoscope models available. Order online or by toll-free by phone 24/7! Your shopping is always Safe and Secure. We offer SAME-DAY stethoscope laser engravings. No tax in 49 states! Most stethoscope orders are shipped within 24 hours!

Medisave specialises in hospital, GP surgery, medical students, nursing homes and general medical supplies through to HSE First Aid Kits. Our range includes over 5,000 product lines, including top branded stethoscopes, otoscopes, diagnostic sets, medical furniture and a comprehensive range of medical disposables. We partner with the best manufacturers to bring you the best prices. We welcome orders from anyone! We can accept orders from most major credit/debit cards through our secure credit card systems, or if you prefer to order over the phone, then please call on 0870 803 4727. We also accept 30 day account invoice orders for all NHS, surgeries, hospitals and companies. All you need to do is simply fax your official order through to FAX. 0800 us. We will process you order within 24 hours of receiving it. You may also send it via post. (our full contact details can be found by clicking here.)

Steeles. com is an official authorized distributor of 3M Littmann stethoscopes and Welch Allyn stethoscopes. We only sell genuine brand new stethoscopes direct from the product manufacturer.

Stethoscopes Diagnostic Instruments Blood Pressure Units Medical Bags Surgical Instruments Small Instruments First Aid & Personal Protection Scrubs & Jackets Home Steeles. com Information View Shopping Cart

You need Microsoft Internet Explorer 4.0 or Netscape 4.05 or better to properly view the McGill Virtual Stethoscope.

It’s finally here! The newest product in the Littmann® stethoscope line is finally here. This electronic stethoscope is value priced that does what you have been asking for.

The Littmann® Electronic Stethoscope Model 4100 features amplification and proprietary Ambient Noise Reduction (ANR) technology allowing you to reduce ambient noise by an average of 75% (-12dB) without eliminating critical body sounds.

Outstanding acoustics and exceptional versatility characterize the Littmann® (commonly spelled Littman) Cardiology III Stethoscope. The innovative design offers a patented tunable diaphragm on each side of the adult and pediatric chestpiece.

The Cardiology III Black Edition features a black plated chestpiece and binaural for a stunning appearance. Offers outstanding acoustics and exceptional versatility characterize the Littmann® Cardiology III Stethoscope.

The Littmann® Master Cardiology Stethoscope meets the exacting standards of health care professionals who demand the highest acoustic response.

The precision of the Littmann® Cardiology S. T.C. Stethoscope begins with innovative design technology. Outstanding acoustics are combined with a unique and easy to grasp “Soft Touch” chest piece that allows easy movement between auscultation sites.

The excellent acoustic sensitivity of a patented tunable diaphragm is the hallmark of the low profile Littmann® Master Classic II stethoscope. Award winning design combines high performance with portable convenience in this single sided chestpiece.

Featuring a two sided chestpiece, the Littmann® Classic II S. E. stethoscope offers high acoustic sensitivity for superior performance. A patented tunable diaphragm on one side augments the traditional bell function of the opposite side.

Featuring a two sided, black powder-coated chestpiece, the Littmann® Classic II S. E. Black Edition stethoscope offers high acoustic sensitivity for superior performance and a stunning appearance.

The new Littmann® Lightweight II S. E. is here. This is the updated version of popular Lightweight stethoscope.

A complete teaching stethoscope with dual headsets connected to a single two sided chestpiece, this classic teaching stethoscope offers high acoustic sensitivity for superior performance.

The affordable general examination stethoscope with a patented single-sided tunable chestpiece design. The Littmann® Select Stethoscope provides good response in both high-frequency and low-frequency ranges.

The Littmann® Master Classic II Veterinary Stethoscope has a 32 inch long tube and is designed for medium and large animal applications.

The stethoscope was invented by the French physician R. T.H. Lannec. Ren Thophile Hyacinthe Lannec is generally considered to be the father of chest medicine.

This site is designed to be an educational experience dedicated to the history of the stethoscope. All images inside are fromthis privatecollection unless otherwise noted to be part of a museum collection. Pleasetour our site .

Despite advances in medicine that make many heart conditions treatable, the absence of effective, early diagnosis often leads to sudden, unexpected deaths. In the Irish Republic, where two people under the age of 35 die from cardiac ailments every week, scientists are working on a new stethoscope that picks up a wider range of heart sounds. The researchers say they believe the device will lead to more rapid diagnosis of coronary artery disease. They hope such diagnoses will be eventually carried out in GPs' surgeries. Sudden loss Mary Desmond Vasseghi lost her son Darius three years ago. Of mixed Irish and Iranian parentage, the 18-year-old was found dead on the floor of the bathroom one morning by his twin sister. Darius was a healthy, active sportsman and student, full of the vigour of life. "He had participated in the world fencing championships, he was Irish champion, he was part of the team, a brilliant student," says Mary. "These are all the things that people spoke about, but more importantly he was just about the nicest person you could ever meet. He was a really nice guy." No idea of problem Mary says that despite the fact that Darius had a medical check up every year, no-one had any idea that her son had a heart problem.

This should be in every GP's office, you go in to the GP with a cold and they should just stick this little multi-channel stethoscope to your chest

According to Dr Rickard the number and complexity of sounds coming from the heart area make it very hard to reliably determine the cause. His approach was to form a multi-disciplinary team, including an expert in volcanic lava flows as well as heart specialists. Together they have designed and built a new "super" stereo stethoscope that uses six microphones instead of one. Dr Rickard said. "It is essentially just six little round microphones about the size of a US quarter, connected to a computer. "On the screen you can see the lub, dub sounds of your heart, a little peak for the lub and a little peak for the dub evolve across the screen." Hidden between these peaks are the sounds that can tell a great deal about heart disease. Dr Rickard uses a musical analogy to describe them. "We might all hope that our hearts sound like Mozart, unfortunately at some stage they might sound like Metallica. "We are building a detector that basically tells the difference between Mozart and Metallica - that might seem easy but it's not." Clinical tests The device is now being used by a team of cardiologists at St Vincent's hospital in Dublin. The research team are collecting data to bolster the scientific credentials of the new stethoscope. There have been many attempts to develop new technologies to detect cardiac problems - most have failed. While the stereo stethoscope has a number of advantages, such as its ability to identify the type as well as the location of a fault, there is no guarantee that it will succeed. But Dr Rickard is an optimist. He says that if the technology can be shown to work, then it should be powerful enough and robust enough to diagnose even the most difficult heart conditions. "The original project was not to just to detect coronary heart disease but to detect any heart abnormality, the idea being that this should be in every GP's office, you go in to the GP with a cold and they should just stick this little multi-channel stethoscope to your chest," he said. "They listen to your heart and they should be able to diagnose a myriad of different things, not just coronary heart disease but congenital heart defects that go unnoticed simply because people aren't listening. "So many people suffer from this and you could really increase the quality of many people's lives by catching them early and turning them back rather than having them walk off the cliff as we currently do." Grey areas For parents like Mary Desmond Vasseghi who have lost a child to an undiagnosed cardiac condition, technology like that being developed at UCD is the way forward. "All we need is a diagnosis, an accurate diagnosis," said Mary. "With the technology of today, diagnosis can leave grey areas for even the best specialists in the world. "What needs to be understood is that many of these heart conditions can be treated, once you diagnose them accurately. "For the moment we do have the treatment - but we don't have the technology to do a proper diagnosis."

Dan Ornadel The stethoscope was invented by Rene Theophile Hyacinthe Laennec in 1816 and has become the symbol by which the modern physician is recognised. He chose the name from the Greek words for chest, stethos, and to inspect, skopeein. Direct auscultation placing the ear on the chest wall-had been known from ancient times but was little used. In Laennec's words. "Direct auscultation was as uncomfortable for the doctor as it was for the patient, disgust in itself making it impracticable in hospitals. It was hardly suitable where most women were concerned and, with some, the very size of their breasts was an obstacle to the employment of this method." His two volume masterpiece, De l'Auscultation Mediate, was published in 1819 for 13 francs (Ł1.70) and accompanied by a wooden stethoscope for 2.50 francs. The book contained the accumulation of his vast clinical experience in which he correlated the physical findings of lung and heart disease with necropsy findings. Much of the nomenclature of auscultation can be ascribed to Laennec. He described the two varieties of normal breath sounds (vesicular and bronchial) and various bruits etrangers (adventitious sounds). He used the term rale (or rattle), but because he thought the resemblance to le rale de Ia mort (the death rattle) might frighten patients, he used the latin term ronchus when speaking at their bedside. Although Laennec's classification of heart sounds was not as complete as for lung sounds, he described the first and second heart sounds, cardiac irregularities caused by ectopic beats, and bruits (murmurs) resulting from valvular disease.

The original stethoscope, a rigid wooden cylinder with a funnel, has evolved into the modern instrument which has two chest pieces, a shallow bell and a stiff diaphragm, connected to the ear pieces by 25-30 cm of tubing. You should perform auscultation after the traditional examination sequence of inspection, palpation, and percussion. The patient should be lying comfortably in a quiet environment-clinical signs may occasionally be missed in a noisy casualty department. It is helpful to be aware of the findings expected in health and disease before approaching the patient with a stethoscope. This avoids spending many hours listening without hearing.

The patient should be sitting or lying comfortably. Wrap an occlusion cuff connected to a sphygmomanometer around the upper arm and inflate it to a pressure about 30 mm Hg above the level at which the radial pulsation can no longer be felt. Place the stethoscope lightly over the brachial artery-it helps to feel for this artery before inflating the cuff. Next lower the pressure until you hear the first sounds (phase I Korotkoff). This is the systolic blood pressure. You should then lower the cuff pressure continuously until the sounds become faint or muffled (phase IV) and subsequently disappear completely (phase V). The phase V reading is usually taken as the diastolic pressure, but the true pressure probably lies between phases IV and V. Blood pressure should be recorded as rapidly as accuracy allows because compression of the arm can itself cause a rise in blood pressure. In patients with severe aortic regurgitation, when the disappearance point may be extremely low or even 0 mm Hg, the Korotkoff IV reading is closer to the true diastolic pressure. If you find a large difference between phase IV and V pressures both readings should be recorded. Occasionally a gap may occur between the first appearance of the Korotkoff sounds and their reappearance at a lower pressure. This auscultatory gap, if not appreciated, may cause you to overestimate the diastolic pressure or underestimate systolic pressure. The average adult cuff measures 12 cm, but if the patient has very fat arms a wider cuff such as a thigh cuff should be used to avoid false readings. It is important that the patient should be as relaxed as possible when the blood pressure is taken. Readings can be significantly altered by anxiety, exertion, postural changes, or the "white coat" effect. The first reading is often high due to anxiety, which may be indicated by a high pulse rate. The second reading is usually more representative. Patients should not be regarded as having hypertension on the basis of a single measurement unless the blood pressure is very high. You should normally have evidence of raised blood pressure on at least three occasions several weeks apart to confirm hypertension.

It is useful to have a routine for auscultation of the heart which you can follow at every examination. Tell the patient what you are doing and warm up the stethoscope before placing it on the patient's chest. Traditionally, the precordium is divided up into four areas where the sounds or murmurs from each valve can be heard. These are the mitral area (apex beat), tricuspid area (left sternal edge, fourth intercostal space), pulmonary area (second intercostal space to left of Sternum) and aortic area (second intercostal space to right of sternum). However, the sounds related to these valves are not always loudest at their respective areas and auscultation should not be limited to these sites alone. Begin your examination at the apex beat, where the first heart sound is usually loudest, and move up the left sternal edge ending with the aortic area and carotid arteries. The diaphragm and bell should be used alternately during the examination. You should repeat the examination with the patient leaning to the left side (mitral sounds and murmurs louder) and sat forward (aortic and tricuspid murmurs louder). Inspiration increases right heart flow and accentuates right heart sounds and murmurs. During expiration there is increased flow to the left heart which increases left heart murmurs. HEART SOUNDS

May be delayed so that reversed splitting of the second sound occurs. The third sound may be normal in healthy young adults but its presence in older patients is often a sign of impaired left ventricular function. This gives rise to a gallop or triple rhythm with a tachycardia. The fourth sound is heard only in sinus rhythm when a hypertrophied left atrium pumps blood into a stiffened left ventricle. You may hear a high pitched opening snap in patients with mitral stenosis when the valve is still mobile but the sound disappears in patients with a stiff and calcified valve. The interval between the second heart sound and opening snap shortens in severe mitral stenosis. Aortic ejection clicks, also high pitched, usually occur with bicuspid aortic valves or congenital aortic stenosis and are due to opening of abnormal cusps. Mid-systolic clicks may occur in mitral valve prolapse and occasionally with a small pneumothorax. MURMURS FIG 1 - Murmurs of aortic and mitral valve lesions Murmurs arise from turbulent blood flow and are characterised by their timing, quality, and intensity. Systolic murmurs can occur with physiological increases in blood flow-for example, in pregnancy-but diastolic murmurs are almost invariably due to disease. Intensity is graded from 1 (just audible) to 6 (audible without a stethoscope). Figure 1 shows the murmurs associated with the common valve lesions. Pulmonary and tricuspid murmurs have a similar quality to aortic and mitral murmurs respectively. Ventricular septal defects typically produce a rough pansystolic murmur at the left sternal edge. Small defects are often associated with loud murmurs (maladie de Roger). An atrial septal defect may produce a pulmonary ejection systolic murmur and characteristic fixed splitting of the second sound. Mitral valve prolapse is often accompanied by a mid-systolic click and a pansystolic murmur if mitral regurgitation is present. Continuous murmurs throughout systole and diastole are characteristic of arteriovenous fistulas. They should not be confused with a pericardial rub, which is also heard in systole and diastole and occurs in acute pericarditis. This sound may be accentuated by leaning the patient forward.

Breath sounds may be reduced bilaterally in patients with obesity, hyperinflation, or hypoventilation. Localised reduction may occur with bronchial occlusion or when air (pneumothorax) or fluid (effusion) is present in the pleural cavity. Bronchial breathing occurs when the normal alveolar filtering mechanism is abolished, most commonly by consolidation in the lungs. Occasionally you can hear bronchial breathing over the top of a pleural effusion. Normally, when speech is transmitted through the lungs to the stethoscope, high frequencies are filtered and words are unintelligible. However, when the alveolar filter is lost as in consolidation, speech ("ninety nine") becomes clear (bronchophony) and whispered sounds can be detected by the stethoscope (whispering pectoriloquy). Aegophony is a term for the high pitched nasal bleating quality of speech heard over the top of a pleural effusion where low frequency sounds are dispersed. Table 3 summarises the changes in breath and voice sounds heard in five common lung conditions.

Practice and application are necessary to become proficient at auscultation. However, a good quality stethoscope is important. The thin tubed variety found on most wards is adequate for measurement of blood pressure but is not recommended for clinical examination. If you are going to buy one choose a good quality stethoscope such as a Littman. I would advise you to put a name tag on your stethoscope as they are easily lost on the wards. Department of Chest Medicine, Whittington Hospital, London N19 5NF Dan Ornadel, senior registrar in respiratory medicine

Stethoscopes are not only useful for doctors, but home mechanics, exterminators, spying and any number of other uses. Standard stethoscopes provide no amplification which limits their use. This circuit uses op-amps to greatly amplify a standard stethoscope, and includes a low pass filter to remove background noise.

MIC is an assembly made out of a stethoscope head and electret mic. Cut the head off the stethoscope and use a small piece of rubber tube to join the nipple on the head to the mic.

3 Watt FM Transmitter, 8 Watt Audio Amp, 22 Watt Audio Amplifier, 50 Watt Amplifier, Crystal Radio, FM Transmitter, Guitar Fuzz Effect, FET Audio Mixer, Microphone Mixer, 8 Note Tune Player, Op Amp Radio, Mono To Stereo Synthesizer, Electronic Stethoscope, Tone Control, Transistor Organ, Stereo Tube Amplifier, Digital Volume Control, Sound Level Meter, Aircraft Radio Communications Receiver

Sir, here we are facing a huge problem to make this Electronic Stethoscope..everything is ok except the electric mic which can collect the heart beat.we cant find such a mic which can collect the heartbeat and convert it to a voltage.

Sir, here we are facing a huge problem to make this Electronic Stethoscope..everything is ok except the electric mic which can collect the heart beat.we cant find such a mic which can collect the heartbeat and convert it to a voltage.please help us.

Sir, I would like to develop a PCB and make this stethoscope. Sir, could you send me more detail regarding the way it works in details. looking forward to hearing from you soon. Thanks

Is this stethoscope just an amplifier of heart beat? Or can it sense small strained vibrations? We are handling a project in which we have to convert strain pulse to voltage. Is this stethoscope identify minute vibrations?

This site is designed to be an educational experience dedicated to the history of the stethoscope. All images inside are fromthis privatecollection unless otherwise noted to be part of a museum collection. Pleasetour our site .

Express yourself with more colors more choices! 3M Littmann Stethoscopes in a variety of colors. As a professional who requires the finest in precision instrumentation, invest in the performance that Littmann® stethoscopes provide. Express yourself everyday with a variety of chestpiece finishes and a spectrum of tubing colors from Caribbean/Ceil/ocean blue to pine green to raspberry to red and all the colors in between. 3M Littmann Electronic Stethoscope Model 3000 Don't miss the sounds you need to hear! Amplify heart, lung, and other body sounds while reducing distracting ambient noise with the LittmannModel 3000. Model 3000 Customer Testimonials Read what clinicians are saying about the Model 3000.

Audible Auscultation is finally here with the ultimate in stethoscope sound quality. Adjust volume for faint heart sounds, obese patients, noisy work environments. Whether you

Take blood pressures, youre a student or you do academic research recordings, the ds32a sets new standards in electronic stethoscope audio quality and ease-of-use. Thinklabs - the intelligent choice in stethoscopes.

Medisave specializes in hospital, clinic, physician, nursing, student and general medical supplies. Our range includes 3M Littmann stethoscopes personalized with free laser engraving, diagnostic equipment, personal physician and doctor purchases. We partner with the best manufacturers to bring you the best prices and bulk purchase to ensure best possible pricing. We welcome orders from anyone! We can accept orders from most major credit/debit cards through our secure credit card systems. We also accept 30 day account invoice orders surgeries, hospitals and clinics. All you need to do is simply fax your official order through to FAX. (800) us. We will process you order within 24 hours of receiving it. You may also send it via post. (our full contact details can be found by clicking here.) Please see our corporate overview and services section for a full overview of our company and worldwide affiliates.

Medisave. net have now launched engraving onto all Littmann electronic model stethoscopes. Using state of the art latest engraving technology, electronic stethoscopes can now be neatly security marked and an ID tag is no longer needed. Medisave can now personalise full names onto the stainless steel tubing before it meets the chestpiece. This exciting new development [.]

3M Littmann has recently seen the successful launch of 2 new colors for the Classic II SE range. Ocean Blue and Peach are the latest variations in the now extensive range available. www. medisave. net will be stocking these shortly and along with our lean pricing policy, our free laser engraving service not only personalizes your stethoscope but [.]

Happy New Year! If acoustic stethoscopes — the kind physicians have used for over two hundred years — are the equivalent of typewriters, then electronic stethoscopes are like word processors. Okay, this analogy is non-intuitive, but hear me out. Electronic stethoscopes, like word processors, are newer, more expensive than the previous generation, and are — well — electronic, with all the advantages and disadvantages this implies. The advantages to electronic stethoscopes are many. As I've written previously in my review of the Littman Electronic Stethoscope Model 3000, it's simply easier to hear heart and lung sounds with an electronic stethoscope than it is with an acoustic stethoscope. (For real-world examples of this, see the previous review.) Plus, some models, like the Littmann 4100 Electronic Stethoscope, allow you to record and playback — think copy and paste — heart and lung sounds for reference or teaching. But anything electronic is prone to failure, and when electronic stethoscopes fail, they fail spectacularly. Don't misunderstand. I'm a fan of my Littman Model 3000, but it's worth pointing out the oddities you should expect if you decide to purchase one of these things. (Some of these observations are taken from my postings on Twitter.)First — and this might sound obvious — the electronic stethoscope requires batteries. Eventually, these batteries will die. Unexpectedly. At exactly the wrong moment. Almost certainly, when you're examining a patient. At this time, your electronic stethoscope will make a sad little noise, then — silence. An eerie silence. And unless you're walking around with an extra AA battery in your pocket — which you will suddenly realize is probably a good idea — you will then say, apologetically, "I'm sorry. The battery in my electronic stethoscope just died."Second, if you carry around an iPhone or a BlackBerry, you will experience intermittently the faint faraway static of your mobile device as you're listening to the heart of a patient. And while this doesn't interfere with your physical exam, it's unnerving. Finally, if you were planning to place another type of diaphgram on your electronic stethoscope — such as the excellent SafeSeal stethoscope covers by DRG — don't. It will cause unbelievable amounts of feedback. As I learned recently, placing incompatible diaphragms on electronic stethoscopes makes your patients' hearts sound like they're being played by Jimi Hendrix.

Your name or message can be engraved on any model stethoscope in your choice of text font (typeface) for only $17.95, with no extra charge for additional text. Click to preview your name in any chosen font.

View & Purchase Description.The "Stethoscope Gold Standard"™ (loudest stethoscope you can buy without a prescription) Metacardia LT.10 combines brilliant frequency response, with external noise cancelling and anti-artifactRead More.

View & Purchase Description.2008 Epicardia VsT-P model (750 series) features now includes new snap-on anti-microbial adult and pediatric tunable diaphragms. And, VSAVR (Voluble Stethoscope Acoustic Vestibule Reflector). a new, Read More.

3M and Littmann are registered trademarks of the 3M Corporation, ADC is a registered trademark of the American Diagnostic Corporation, Hewlett Packard is a registered trademark of Hewlett Packard, Tycos and Welch Allyn are registered trademarks of Welch Allyn, DRG is a registered trademark of Doctor's Research Group. www. stethoscopes. com is Internet fulfillment service of Stethoscopes Plus. Inc, 7683 SE27th Street, Suite 146, Mercer Island, WA 98040, USA. e-mail. us Design and Miva Website Programming by PCINET, LLC

November 27, 2006--A new type of stethoscope enables doctors to hear the sounds of the body in extremely loud situations, such as during the transportation of wounded soldiers in Blackhawk helicopters. Using ultrasound technology, the kind used to generate images of internal organs, muscles and unborn fetuses, the new stethoscope design will be presented later this week at the Fourth Joint Meeting of the Acoustical Society of American and the Acoustical Society of Japan, which will be held at the Sheraton Waikiki and Royal Hawaiian Hotels in Honolulu, Hawaii. Researchers at Active Signal Technologies, Inc., of Linthicum Heights, Md., in collaboration with the U. S. Army Aeromedical Research Laboratory (USAARL) in Fort Rucker, Ala., have developed an ultrasound stethoscope that is nearly impervious to loud noise and is capable of making accurate readings at noise levels up to 120 decibels, similar to the volume experienced at the front row of a rock concert. Current acoustic stethoscope technology picks up and amplifies vibrations that let doctors hear the heart and lungs. These models become difficult to use effectively around 80 decibels, a noise level comparable to an alarm clock or a busy city street. When noise levels reach 90 decibels, these types of stethoscopes are rendered useless. Modern electronic stethoscopes have raised the maximum tolerable noise level to 90 decibels to 95 decibels by replacing the ear pieces with loudspeaker inserts that provide a better seal with the ear canal and replacing the tubing with electrical cables that do not pick up acoustic noise. The challenge to build a better stethoscope originated from the Army's Small Business Innovation Research program. For soldiers wounded in combat, the first hour after sustaining an injury is known as the "critical hour," when diagnoses and emergency treatment must take place to give them the best chance of recovery. These soldiers are often transported by helicopter, where noise levels prohibit the use of traditional stethoscopes. Auscultation, the act of listening to sounds within the body as a method of diagnosis, is an important tool for assessing the integrity of the heart muscle, valves and major arteries. Auscultation of the lungs can be essential when confirming the placement of endotracheal tubes to restore or protect the airway or when diagnosing conditions such as a collapsed lung, asthma or pulmonary edema. Houtsma said he is proud of what the research teams were able to accomplish. "Having heard so much about the first critical hour that may mean life or death for a seriously injured person, I feel fortunate to have been in a position to lead a great team of dedicated researchers in enabling medical auscultation in very noisy environments," Houtsma said. "I expect this invention to save many lives that otherwise might have been lost." Active Signal Technologies was awarded grants from the Army totaling $900,000 and another $50,000 from the state of Maryland to develop a new type of stethoscope that could be used in high-noise situations. After several unsuccessful attempts to reach the goal of effectiveness at 110 decibels, the idea of using ultrasound technology was implemented. Traditional stethoscopes transmit and amplify sound that is within the range of human hearing, from about 20 hertz to 20,000 hertz. Most audible sound, including that of the heart and lungs, takes place at around 100 hertz to 200 hertz. The ultrasound models transmit a sound signal at 2.3 megahertz into the patient's body, according to USAARL stethoscope project team leader Adrian Houtsma. This sound is reflected back to the stethoscope at a slightly different frequency because of the velocity of the internal organs. This is called the Doppler effect. The difference in frequencies between the sound wave that is transmitted and the sound wave that is received can be computed to determine the motion of the internal organs. This difference frequency is then converted into audible sound. Because they are based on different physical principles than conventional stethoscopes, ultrasound models produce a markedly different sound. Where an acoustic stethoscope yields a "lub-dub" sound from a heartbeat, with the first beat being the strongest, an ultrasound stethoscope will yield a "ta-da-ta" pattern, with the second beat being the strongest. The ultrasound stethoscopes are almost ready to begin the process of FDA approval, which is likely to take two to three months. Then Active Signal Technologies will begin manufacturing the devices to sell to the armed forces. The company's chief executive officer, Arthur Cooke, said the commercial release of the stethoscopes will likely be very small at first, since the cost could be anywhere between $250 and $700. He said he hopes positive feedback from the armed forces will generate widespread interest. "Once these are seen and implemented," Cooke said, "there will be more commercial interest." On the Web. A Noise-Immune Stethoscope for Use in Noisy Environments, a lay-language paper by Adrianus Houtsma, from the ASA meeting's virtual press room Contact. Turner Brinton American Institute of Physics Tel. us. us

Play Doctor There you are, you and your love. The candles are undulating their hot flames - splashing sensuous silhouettes against the wall. The scents of romance are in the air. You put on your Red Hot Stethoscope and get out your Sonic Screwdriver. It's time to play Doctor. You can almost hear Barry White cringing and applauding all at once. You press the head of the stethoscope on soft skin and . . . diagnose a grade 2 systolic heart murmur! And seriously, we gave this stethoscope a funny name, but it really is a professional grade unit. Red because red is the accepted color of amour. Also, with the Red Hot Stethoscope, you'll never get your instrument confused with all the boring black stethoscopes your friends and/or colleagues use. So feel free to play doctor, break into old time safes, or diagnose cardiovascular problems. Just make sure not to confuse business with pleasure (don't want you cracking anyone's heart).

(En español. Estetoscopio) Say. steth-eh-skope When you go to the doctor, he or she will probably use something called a stethoscope to hear the sounds that the inside of your body makes. Usually, we can't hear these sounds very well, but with a stethoscope they get a whole lot louder! With it, the doctor can hear your heartbeat, the air going in and out of your lungs, tummy gurgles, and other wonderful noises that tell the doctor how things are working inside.

I have had many questions about my stethoscope, where it came from, how it works, and others. My attempt to answer all these questions is below. My current stethoscope is a Cardionics E-Scope II for the Hearing Impaired that works through a couple of other parts to transmit the sound to my hearing aid. How it works. Below is a picture of the Cardionics E-Scope II for the Hearing Impaired (Note. they also have a regular E-Scope II with the earpieces for normal hearing individuals). This stethoscope is an electronic, amplified stethoscope, and it plugs into my Lexis FM transmitter. The sound from the stethoscope head travels through the stethoscope and through the cord to the FM transmitter. Then, the FM transmitter sends the FM signal to the FM receiver, which is attached to a boot that is plugged into my bone conduction hearing aid. The FM receiver transmits the sound to my hearing aid and I hear the sound just like anyone else listening through a regular stethoscope would hear it. The wonderful thing about this system is that I only have two things to turn on, the stethoscope and the FM receiver. There are no cords running between my stethoscope and my hearing aid for feisty children to grab. Both the FM system and the stethoscope use regular AAA batteries (no special, hard-to-find batteries). The only thing I haven't tested out is whether or not I will get interference of the FM signal in a variety of hospital settings.stay tuned. I'll update you on this as I figure it out.

Version 2 Stethoscope. My now spare stethoscope that was modified by my boyfriend. It worked well until my TMX neckloop and receiver started giving me problems as it got older and worn out. You can see it here. Version 1 Stethoscope. My oldest stethoscope used to be posted on this page as well. I was not very happy with it for various reasons, but if you want to see it and how it works, click here.

Scientists have developed a "smart stethoscope" that can hear when a kidney stone has been successfully broken down by treatment. The device listens to echoes created by shock wave therapy (lithotripsy) to let the doctor know if therapy has worked. Trials at Guy's Hospital in London have showed promising results, saving patients unnecessary repeat therapy and x-ray monitoring. The device was developed along with scientists from Southampton University. Hearing echoes Lithotripsy works by focusing thousands of shock waves onto the kidney stones in an effort to break them into pieces small enough to urinate out of the body or be dissolved by drugs. But there is no way of monitoring how the process is getting on.

Doctors can take an x-ray before and after treatment to see if there is any change in the appearance of the stone. But it is often difficult to tell from these pictures and is more a case of trial and error - if the symptoms return then the patient will need more shock wave therapy. Professor Tim Leighton and colleagues at the Institute of Sound and Vibration Research at Southampton University, along with kidney experts at Guy's, decided to see whether the echoes produced by the shock waves could be interpreted in some way. Prof Leighton said. "It's a bit like the man on the railway who walks along the length of the train, hitting the metal wheels with a hammer to find out if any are cracked. "If the wheel is cracked it gives a duller sound. "What we are looking for is a stone to go from being intact at the start of treatment to fragmented at the end of the treatment." The sounds The smart stethoscope is a small probe, similar to those used to trace heart patterns using an ECG, which is taped to the flank of the patient.

Just like a normal stethoscope, it picks up sound. From here, the sounds are transmitted to a box the size of a packet of biscuits which amplifies and changes the frequency of the sounds so the doctor can hear them. When the stone is intact the sound given off is a 'tick'. When it has been shattered into small pieces the sound changes to a 'tock'. 'Non-invasive' Prof Leighton said the device could also be wired up to a computer that would analyse the sounds and display the results using a traffic light system - red for no success, amber for some success and green for fully successful treatment. So far, they have used the device to monitor treatment in 50 patients with kidney stones. With funding from the Engineering and Physical Science Research Council, the researchers have developed a prototype they say works extremely well. Prof Leighton said. "It's been superbly successful. I have been astounded by how effective it is as a monitor. "Plus, it's completely non-invasive. It does not expose you to any radiation." He said it would reduce rather than replace the need for x-rays, which would still be used to locate the stone within the kidney.

2047U/C - ULTRASONIC/CONTACT STETHOSCOPE The 2047U/C combines the features of the 4020 standard stethoscope - with those of an ultrasonic (sounds higher in frequency than the ear can hear) detector. Many watches and clocks generate a considerable amount of ultrasonic energy which will travel a great distance if unobstructed. If the watch or clock can be "seen" by the ultrasonic probe, detection ranges on the order of 1 to 20 feet are not uncommon. The ultrasonic probe is highly directional so it tunes out background noise. The system consists of an amplifier/detector assembly (measures 1x3x5 inches), contact probe, ultrasonic probe, and headset, carrying case. The amplifier/detector is powered by a single 9-volt battery. A 20-foot contact probe extension cable, 20-foot ultrasonic probe extension cable, recorder cable and other accessories are also available by special request. The 2047 is a pocket sized high gain, low noise amplifier which combines a standard electronic stethoscope with those of an ultrasonic detector. The ultrasonic probe is highly directional and tunes out background noise. The 2047U/C also does an excellent job locating video cameras, hidden tape recorders, and video tape recorders. Executive protection agents and bodyguards frequently use the 2047U/C to detect hidden tape recorders, video recorders, cam-corders, and other cameras. This is accomplished by concealing the ultrasonic probe in the sleeve and covertly sweeping a suspect item or person to determine covert eavesdropping devices. The contact probe is then used to further explore potential threats. The 2047U/C is commonly used along with a 2060LV RF detector. The 2047U/C is designed to detect conducted surface vibrations in the audible range as well as airborne sounds in the ultrasonic (above normal hearing) range of 35 to 45 kilohertz (KHz). The unit is supplied with amplifier/detector assembly, contact transducer/ probe (SILVER), ultrasonic transducer (BLUE), special 2,000 ohm headset and carrying case. The unit is designed specifically to be used with the high impedance headset supplied and not low impedance (8-32 ohm) headsets. TO OPERATE AS A STANDARD STETHOSCOPE. Insert the contact probe (SILVER) into the CONTACT PROBE jack. NOTE. There are three (3) jacks of the same physical type on the unit, be careful not to confuse one with the other. Place the YELLOW switch in the CONTACT-DOWN position. Insert the headset into the HEADSET jack. The headset is worn with the gray tube under the chin with the sound output holes facing slightly forward (30 degrees). Place the probe on the desired surface and adjust the VOLUME accordingly. TO OPERATE AS ULTRASONIC STETHOSCOPE. Screw the ultrasonic probe (BLUE) onto the ULTRASONIC PROBE connector. Make sure the connection is firm but not over-tightened. Place the YELLOW switch in the ULTRASONIC-UP position. Point the open end of the probe at a mechanical clock or watch (source of ultrasonic sound) and adjust the VOLUME. Bear in wind that ultrasonic energy will travel considerable distances if unobstructed. A single sheet of paper, for example, will effectively block ultrasonic energy from reaching the probe. The ultrasonic probe can be tested by having someone tear a sheet of paper 20 to 30 feet from the probe. The sound should be heard clearly. The unit has a RECORDER output jack which provides line level audio into 10,000 ohms. This jack is run to the AUX (AUXILIARY) input on a tape recorder. The 2047U/C is powered by a single standard 9 volt battery (Alkaline always preferred) which will provide an approximate total of 70 hours ON time. To replace the battery, loosen the two silver screws on the sides of the unit one or two turns. Carefully lift off the back cover, remove the old battery (noting its position), replace it with a fresh battery and replace the back cover. Be careful not to pinch the battery connector leads with the back cover. Tighten the two screws but don't over-tighten. Remove the battery during prolonged periods of storage. As with any piece of sophisticated electronic equipment, do not store the 2047U/C in extreme heat or humidity. NOTE. Television sets generate frequencies which fall into the detection range of the ultrasonic probe, therefore, do not operate the 2047U/C within 100 feet or an operating TV set, monitor, or computer display.

Despite advances in medicine that make many heart conditions treatable, the absence of effective, early diagnosis often leads to sudden, unexpected deaths. In the Irish Republic, where two people under the age of 35 die from cardiac ailments every week, scientists are working on a new stethoscope that picks up a wider range of heart sounds. The researchers say they believe the device will lead to more rapid diagnosis of coronary artery disease. They hope such diagnoses will be eventually carried out in GPs' surgeries.

But detecting heart disease just by listening is an altogether more difficult exercise. According to Dr Rickard the number and complexity of sounds coming from the heart area make it very hard to reliably determine the cause. His approach was to form a multi-disciplinary team, including an expert in volcanic lava flows as well as heart specialists. Together they have designed and built a new super stereo stethoscope that uses six microphones instead of one. Dr Rickard said. It is essentially just six little round microphones about the size of a US quarter, connected to a computer. On the screen you can see the lub, dub sounds of your heart, a little peak for the lub and a little peak for the dub evolve across the screen. Hidden between these peaks are the sounds that can tell a great deal about heart disease. Dr Rickard uses a musical analogy to describe them. We might all hope that our hearts sound like Mozart, unfortunately at some stage they might sound like Metallica. We are building a detector that basically tells the difference between Mozart and Metallica - that might seem easy but it's not. Clinical tests The device is now being used by a team of cardiologists at St Vincent's hospital in Dublin. The research team are collecting data to bolster the scientific credentials of the new stethoscope. There have been many attempts to develop new technologies to detect cardiac problems - most have failed. While the stereo stethoscope has a number of advantages, such as its ability to identify the type as well as the location of a fault, there is no guarantee that it will succeed. But Dr Rickard is an optimist. He says that if the technology can be shown to work, then it should be powerful enough and robust enough to diagnose even the most difficult heart conditions. The original project was not to just to detect coronary heart disease but to detect any heart abnormality, the idea being that this should be in every GP's office, you go in to the GP with a cold and they should just stick this little multi-channel stethoscope to your chest, he said. They listen to your heart and they should be able to diagnose a myriad of different things, not just coronary heart disease but congenital heart defects that go unnoticed simply because people aren't listening. So many people suffer from this and you could really increase the quality of many people's lives by catching them early and turning them back rather than having them walk off the cliff as we currently do.

A c. 1820s antique Laennec monaural stethoscope turned in three parts from cedar. The insert cone of cedar and brass was used when listening to heart and voice sounds. Rene Theophile Hyacinthe Laennec ( us. ) invented the stethoscope around 1816.

For additional antique stethoscopes and other medical antiques, visit the various sections of this web site.

Stethoscope Covers|www. StethoSocks. com|151 Colorful StethoSocks In Stock, Shipping Daily Worldwide"/>

Like I said in the title this is a good durable stethoscope. It was the recommended one for nursing school when I started back in 1998 and I have had the same one since. It has worked well for me through school, working in several different units, and even survived the heat and humidity well when I took it to Indonesia three times. It has good acoustic quality.

Littmann Stethoscope I have not had any problems with the stethoscope. I would tell anyone that needs a basic stethoscope that it is well worth the money.

Awesome stethoscope for the money I can't argue with Littmann quality. Comfortable, durable, and precise. I can hear everything from lung sounds to the faintest BP over my obnoxiously loud Horton ambulance on.

Listen to this. This is a very nice stethoscope. The ear pieces are comfortable. I use it primarily at home, to practice for my work.

Stethoscope I ordered this for my dad who is a Veterinarian. He was impressed with sound quality and the comfortable fit. This is a nice quality stethoscope for a very reasonable price.

Great all around Stethoscope Nice to have, great all around stethescope. Great quality for lung and heart sounds, very sensative.

The site provides a virtual stethoscope interface for auscultating normal and abnormal cardiac and respiratory sounds as well as other material related to auscultation and cardiac and pulmonary physiology and pathophysiology.

Stethoscopes - Lumiscope - Brand. Lumiscope, Adjustable binaural. One-piece molded vinyl tubing. Available in assorted colors. Be sure to ask a.

Stethoscopes - Brand. Thinklabs, Audible ausculation is finally here with the ultimate in stethoscope sound quality. Adjust volume for faint he.

Stethoscopes - Brand. Littmann, 3M's new Ambient Noise Reduction technology reduces distracting room noise by an average of 75% without elimina.

Stethoscopes - Brand. Littmann, Featuring a two-sided chestpiece, the Littmann Classic II S. E. Stethoscope offers high acoustic sensitivity. A.

Stethoscopes - Brand. eGeneralMedical, Designed and approved by a certified cardiologist and a physician assistant. Extra-deep Oscillating Soun.

Stethoscopes - Omron - Brand. Omron, A 5-in-1 multipurpose Quintscope, the Omron Sprague Rappaport - Type Stethoscope is designed for flexibilt.

Stethoscopes - Brand. Littmann, A tunable diaphragm and superb craftsmanship offer the ultimate performance in a superior single-sided stethosc.

Stethoscopes - Brand. Littmann, Outstanding acoustic performance and exceptional versatility. Innovative design offers a patented tunable diaph.

Stethoscopes - Brand. Littmann, A convenient tunable diaphragm in a single-sided, coated alloy chestpiece providing reliable and clear acoustic.

Stethoscopes - Welch Allyn - Brand. Welch Allyn, The most respected name in auscultation has a sleek new look and feel. Provides superior acoust.

Stethoscopes - Brand. Littmann, Outstanding acoustic performance and exceptional versatility. Innovative design offers a patented tunable diaph.

In many ways, the sounds of respiration have remained timeless since Lannec (1) improved their audibility with the stethoscope.

Stethoscopes Despite the high cost of many modern stethoscopes, these instruments remain simply conduits for sound conduction between the

Models and Predictions Many factors that influence auscultation, including the response of the stethoscope and psychoacoustic phenomena, have contributed

Lung sounds have been valuable indicators of respiratory health and disease since ancient times. Lannec's stethoscope raised

The sound repertoire of the lung may indeed be limited when heard through a stethoscope, but it clearly exhibits a much wider

P D Welsby, G Parry, and D Smith The stethoscope. some preliminary investigations Postgrad. Med. J., December1,2003. 79(938). 695 - 698. [Abstract] [Full Text] [PDF]

A stethoscope is a medical instrument used to listen to sounds produced in the body, especially those that emanate from the heart and lungs. Most modern stethoscopes are binaural. that is, the instrument is intended for use with both ears. Stethoscopes comprise two flexible rubber tubes running from a valve to the earpieces. The valve also connects the tubes to the chestpiece, which can be either a bell-shaped piece to pick up low sounds or a flat disk for higher frequencies. The stethoscope is used mainly for the detection of heart murmurs, irregular heart rhythms, or abnormal heart sounds. It is also used to listen to the sound of air moving through the lungs in order to detect abnormalities in the air tubes and sacs found in the lung walls. The universally acknowledged inventor of the stethoscope is Rene-Theophile-Hyacinthe Laennec, who, finding it difficult to listen to a patient'.s heartbeat unaided, rolled up a cylinder of paper, thereby amplifying the sound. Laennec had noticed, as others such as Leonardo da Vinci had before him, that sound becomes amplified to the human ear as it passes through wood. He observed children holding a piece of wood to their ears and scratching the other end. The wood increased the sound of the scratching. In 1819, Laennec provided physicians with what he originally called a baton, a hollow cylinder made from wood (walnut or such light woods as fir or boxwood) perhaps as short as 5.9 inches (15 centimeters) in length. The bore was shaped like a trumpet, but for listening to the heart, a stopper could be inserted to make the bore merely cylindrical. The first true stethoscopes (based on Laennec '.s ".baton".) were made of wood (usually cedar or pine) tubes that ranged in shape from cylinder- to goblet- or hourglass-shaped. The lengths ranged from 5.90 to 8.86 inches (15 to 22.5 centimeters). Unlike those of today, these stethoscopes were monaural. that is, they were held to one ear and had no ear plugs. This type of stethoscope is still used in some places in Europe. Stethoscopes of varying materials (such as hard rubber or aluminum) were common during the mid-nineteenth century. A few telescoped to provide a stethoscope of varying length. The first innovation was not at first applied to the stethoscope, but to conversation tubes and hearing aids produced by many manufacturers in the late 1800s. These items were at first horn-shaped, yet eventually included earplugs connected to rubber tubes. Designers of stethoscopes adapted such devices, and the stethoscope of the time consisted of an earplug, a flexible rubber tube, and a bell-shaped chestpiece. Despite its short-comings in the conductance of all chest sounds equally, this early stethoscope was commended for its convenient shape and flexibility. Binaural stethoscopes increased in popularity fairly rapidly. As early as 1829 a trumpet-shaped mahogany chestpiece was screwed into a joint from which two lead pipes led to the ears. The device, invented by medical student Nicholas P. Comins, was deemed flexible (despite the rigidity of the wooden and metallic parts), because unlike the earlier monaural stethoscopes, it had movable parts. The 1840s and 1850s saw the development of prototypes that closely resembled the stethoscope of today. In 1841 Marc-Hector Landouzy of Paris introduced a stethoscope made partly of gum elastic tubes. this proto-type

Was improved slightly in 1851 by Arthur Leared of Dublin. The main problem with many early designs was the inferior earpieces that provided muffled sound. George Cammann of New York perfected the nineteenth century stethoscope in 1852. His instrument, considered to be the best of the time, had ivory or ebony knobs as earpieces, and these had springs attached to hold them more securely in the ear. The tubes were made of coils of wires sandwiched between rubber that was then coated with silk or cotton. The chestpiece was surrounded by a ring of rubber, creating a suction cup that more easily adhered to the skin. Another type of stethoscope was developed in 1859. Designed by Scott Alison, the differential stethoscope had two separate chestpieces, allowing the user to hear and compare sounds in two different places. This stethoscope also allowed the physician to better pinpoint the source of the sound through the natural process of triangulation our ears normally use to discover the direction of sounds. The first electronic stethoscopes became available as early as the 1890s. by 1902, Albert Abrams developed a truly useable one. With it, he was able to amplify the sounds made by the heart. By applying resistance gradually to the circuit, he could eliminate certain sounds, thereby differentiating between the heart'.s muscular and valvular movements. The basic form of the binaural stethoscope has remained virtually unchanged since the beginning of the twentieth century. Major advancements have been made in the type of materials used—.plastics such as polyvinyl chloride and Bakelite became available. the manufacturing processes that increase the airtightness and flexibility of the stethoscope have been refined. and large scale production has been streamlined, ensuring that medical practitioners can obtain sufficient stethoscopes

Although the stethoscope is a simple device, it is typical for its metal parts and plastic parts to be manufactured at separate locations, and for the entire device to be assembled at yet another location. It is also common for inexpensive models to be sold disassembled.

A binaural stethoscope consists of earplugs, binaural pieces, flexible tubing, a stem, and a chestpiece. The earplugs are attached to springs made of steel so that they fit firmly in the ears, while the earplugs themselves are made from either Delrin (a trademark plastic that is white, rigid, and similar to nylon) or softer molded silicone rubber. The binaural pieces that run from the earplugs to the flexible tubing, the stem that runs from the flexible tubing to the chestpiece, and the chestpiece itself are made from metal (aluminum, chrome-plated brass, or stainless steel). The flexible tubing is either polyvinyl chloride or latex rubber. The stem for stethoscopes with dual diaphragms has a valve with a steel ball bearing and a steel spring inside. This type of stethoscope can switch from a flat diaphragm to a cupped one when turned by shifting the ball bearing to cover up the pathway to the diaphragm that is not in use. The flat diaphragm is formed from a flat, thin, rigid plastic disk that can be Bakelite, an epoxy-fiberglass compound, or other suitable plastic. Today, most stethoscopes have an anti-chill ring attached to both sides of the diaphragm. The anti-chill ring, besides being more comfortable for the patient, allows better suction and thus allows sounds to be heard more clearly. The rings are made from either silicone rubber or polyvinyl chloride.

Although the stethoscope is a simple device, it is typical for its metal parts and plastic parts to be manufactured at separate locations, and for the entire device to be assembled at yet another location. It is also common for inexpensive models to be sold disassembled. Stethoscopes are rarely custom-made. If there is a large volume sold to one customer, the manufacturer can make a certain specified color or put the name of the hospital onto the stethoscopes.

2 More expensive stethoscopes have tubing that is ".dipped.". The binaural pieces are repeatedly dipped into a liquid latex until the tubes are of the correct thickness. Tubes intended for inexpensive or disassembled models are molded or extruded using standard methods. To attach the separate tubing, it is first heated by placing it in warm water. next, it is pushed onto the binaural pieces, wrapping snugly around the barbs. Another less-common method of attaching the tubing is to place the binaural pieces in a mold and then place the tubing around them to form a seal.

3 Stethoscopes are hand assembled. Once the binaural pieces have tubes, the diaphragm is placed in the chestpiece and sealed. Next, the anti-chill ring is put on both sides of the chestpiece. This can be done by cutting a recess in a circular track around the rim and slipping the ring inside. The preferred method is to stretch the ring around the rim of the diaphragm or bell, making a secure fit. The earplugs are then screwed on.

4 Inexpensive stethoscopes, which may be disassembled, are placed in bags and sealed. Mid-range stethoscopes are boxed. Quality stethoscopes are placed in sturdy boxes that have spaces die-cut in the packaging into which the stethoscope and accessories fit snugly. The stethoscopes are then placed in cases that hold 20 to 50 boxes each and shipped to medical supply dealers, or, if there is a large volume, directly to a hospital. The medical supply dealers then provide stethoscopes to private practice, hospitals, medical supply stores, and drug stores.

A stethoscope must be able to pick up incredibly subtle, quiet sounds at such a level that a person of normal hearing can detect them using the instrument. Air leaks can decrease the volume of sound by as much as 10 to 15 decibels, as well as allow ambient noise to enter the stethoscope. therefore airtightness is imperative. Even inexpensive, disassembled stethoscopes available in drug stores easily disclose recognizable sounds (such as a heartbeat), while the highest quality instrument must meet tolerances of approximately 2.5 x 104 meters to ensure that all the pieces fit snugly and the junctions are airtight. Air leaks are almost inevitable, and are caused by cracking, punctures, weakness of metal, or pinhole formation during the manufacturing process. To detect any problems before shipping, the manufacturer places the stethoscopes in a machine that blows a steady stream of air through each instrument. There are also tug tests for stethoscopes. The instrument is placed on a machine that pulls at a certain level of force to check whether normal use will separate the pieces. All raw materials are also inspected, and each piece manufactured at a place other than the assembly plant is inspected for quality. Specific tolerances and procedures are checked at each step of the manufacturing and assembly process to see that the work is done correctly. The inspection consists of visually examining the stethoscope and testing the mechanical parts for proper fit and function. Every single assembled stethoscope is then checked to see if it is acoustically reliable. Nurses, doctors, and other health care professionals undergo extensive training in auscultation so that they can interpret the sounds they hear, though most might specialize in only one or a few types of readings. For instance, somebody listening to a patient breathe must know the sounds of a healthy lung system, as well as the sounds of each type of lung dysfunction so the patient can be diagnosed correctly. Maintenance and proper use of the stethoscope is just as important as the quality of manufacture. The stethoscope should be inspected periodically for air leaks and for defective parts that need replacing. To remove earwax and lint, the earplugs and chestpiece should be carefully wiped with rubbing alcohol, and the rest should be washed in mild, soapy water. If hospital procedure requires it, and the stethoscope can handle it, it should undergo standard sterilization procedures.

Bak, David J. ".Stethoscope Allows Electronic Amplification,". Design News. December 15, 1986, p. 50. Beaumont, Estelle. ".For the Latest Word on Stethoscopes. Listen Here!".Nursing78. November, 1978, pp. 33-37. Jaffe, Joe. ".Build This Doppler-Ultrasound Heart Monitor,". Radio-Electronics. November, 1991, p. 49. Reiser, Stanley Joel. ".The Medical Influence of the Stethoscope,". Scientific American. February, 1979, pp. us. Stone, John. ".Cadence of the Heart,". The New York Times Magazine. April 24, 1988, pp. 61-62.

StethoScope service minimizes risk and reduces cost with real-time calibration points for pore pressure models. This enables mud weight optimization so that drilling can continue confidently at ideal penetration rates. Our measurements also improve casing point selection by offering a better understanding of the formation pressure around the planned casing point, reducing risk.

Request more information about StethoScopeFormationPressureWhileDrilling and other Schlumberger innovations.

For decades, physicians relied almost solely on the stethoscope From the time it was invented in 1816 until early this century, the stethoscope was the most reliable and informative tool available for diagnosing cardiovascular disease. Although other, more sophisticated diagnostic methods have come into use since then, the stethoscope has never been discarded. "At the turn of the century.diagnosis relied on taking a history and examining the heart with a stethoscope, and treatment consisted mainly of rest and a few standard oral medications." said W. Bruce Fye, a University of Wisconsin cardiologist and historian. The stethoscope battles embarrassment Since the time of Hippocrates, physicians listened directly to patients' chests as they tried to assess cardiac health. The inventor of the stethoscope, Rene Theophile-Hyacinthe Laennec, relied on this method, too.

The inventor of the stethoscope listens directly to a patient's chest to hear the effect of tuberculosis on the lungs.

One day, when he needed to examine an obese young woman, Laennec hesitated to put his head to her chest. Remembering that you can hear a pin scraping one end of a plank by putting your ear to the other end, he came up with the idea for a stethoscope prototype. He rolled a stack of paper into a cylinder, pressed one end to the patient's chest, and held his ear to the other end. "I was surprised and pleased to hear the beating of the heart much more clearly than if I had applied my ear directly to the chest," Laennec said in 1816. Laennec's first manufactured stethoscope was a simple wooden tube. A succession of different designs followed his, including, eventually, a "binaural" type with two ear pieces. In 1850, George Camman substituted rubber for stiffer materials and made a more comfortable modelthe forerunner of today's stethoscopes.

The use of the stethoscope led to better descriptions of heart sounds and improved ability to distinguish among various murmurs and rhythmic disturbances. It increased understanding of how blood moves through the heart in each cardiac cycle, under normal and abnormal conditions. "A wonderful instrument called the stethoscope, invented a few months ago. is now in complete vogue in Paris." (London Times December 19, 1824)

What are the sounds that a stethoscope reveals? A normal heartbeat makes a lub-dup sound. This sound is created when the heart tissue vibrates when blood is thrown into turbulent oscillations as it is pushed against the heart valves and bounces back.

In 1905, Russian surgeon Nikolai Korotkoff developed the modern technique of using a stethoscope to listen for the sounds of blood flowing through the artery. His method proved to be extremely accurate and led to the discovery of hypertension.

It has hung round the necks of doctors and nurses for almost 200 years, but the stethoscope may soon be a thing of the medical museum. Researchers claim that even the most up-to-date electronic stethoscopes are no match for an MP3 player. Neil Skjodt, from the University of Alberta, Canada, argues that off-the-shelf music players can help doctors to record a variety of respiratory noises simply by pressing the machines in-built microphone directly to a patients chest. The quality, clarity and purity of the loud sounds were better than I have ever heard with a stethoscope, Dr Skjodt told the European Respiratory Societys annual congress in Stockholm, Sweden. Another big advantage of the MP3 player, he said, is that these recordings can then be stored and sent to a specialist, analysed using more sophisticated software, or added to a patients files for future reference.

Frans de Jongh, a respiratory physiologist at the University of Amsterdam, said that using MP3 players in listening to chest noises had merit. But he said that, as with stethoscopes, accurate assessment of a patients condition depended on expert interpretation of sounds by the doctor listening.

As a junior doctor, I have tried using electronic stethoscopes and I imagine they are similar to MP3 players because they both use a microphone. Unfortunately, although they are fantastic in ideal situations where you have lots of time to position the patient in a quiet room, they are absolute rubbish in an emergency, which is when they are important. In an emergency, the room will be noisy, the patient uncooperative, and you have to listen for lung sounds through a layer of clothing. Microphones pick up all the background sounds - especially the rustle of clothing and even the creaking joints in your fingers! In addition, the batteries are sure to run out at the crucial moment and you look an oddball for wearing such a different and uncomfortable-to-wear device.

Stethoscope. An instrument used to transmit low-volume sounds such as the heartbeat (or intestinal, venous, or fetal sounds) to the ear of the listener. A stethoscope may consist of two earpieces connected by means of flexible tubing to a diaphragm placed against the skin of the patient. The stethoscope has become one of the symbols of the medical profession. The origins of the stethoscope can be traced back to the French physician, Laënnec, who invented a crude model in 1819. It has undergone many modifications since then. The original consisted of a wooden box that served to help physicians hear the sounds within the chest cavity. From the French "stethoscope" which was created from "stethos" (meaning chest in Greek) + scope.

The stethoscope is an instrument for listening to sounds produced by organs in the human body, including the heart and lungs. One end of the stethoscope is placed against the body, and the other end is placed in or at the ear, a method called direct auscultation. The sounds are then interpreted by an experienced listener.

Laennec invented the stethoscope in 1816 during an examination of a young woman with a heart affliction. Laennec was unable to put his ear to the woman'.s chest to evaluate her condition. This was both because the patient was a very large woman and because moral standards of the day considered such an examination to be immodest (indecent). In a burst of inspiration, Laennec rolled a sheaf of paper tightly into a tube. He placed one end of the tube over the patient'.s heart and listened from the other end. The doctor later wrote, ".I was both surprised and gratified at being able to hear the beating of the heart with much greater clarity and distinctness than I had ever done before by direct application of my ear.". Laennec made a later stethoscope from a wooden tube. In 1819 Laennec wrote a book describing his instrument and the diagnoses to be made with it. To help promote the book, the publisher gave a stethoscope with each book purchase.

Austrian doctor Joseph Skoda ( us. ) promoted the use of the stethoscope. He was very instrumental in popularizing its use for diagnostic purposes. Various improvements were made to the device over the years, including the use of pliable (flexible) tubing, introduced in 1850. In 1852 American doctor George P. Cammann developed a binaural stethoscope, a stethoscope with an earpiece for each ear.

The next major development in stethoscope design came 100 years later, when the electronic stethoscope appeared in 1980. One application of an electronic stethoscope is the fetal monitor, which is used to listen to a unborn baby'.s heart rate. With the ".external". monitor, the heart rate is heard through belts placed around the mother'.s abdomen (stomach). With the ".internal". monitor, the heart rate is heard through a wire that is attached to the baby'.s scalp.

A modern stethoscope. The stethoscope is an instrument for listening to sounds produced by organs in the human body, including the heart and lungs. One end of the stethoscope is placed against the body and the other end is placed in or at the ear.

The advantage of electronic monitoring of the heart rate is that the monitor provides continuous listening and can pick up uncommon patterns, then can sound an alert so that medical personnel can take immediate action. That action is almost always to deliver the baby by Cesarean section (abdominal surgery), then to guard against oxygen starvation, which may occur with a faulty heartbeat and ultimately result in brain damage. Electronic stethoscopes are also being studied for their usefulness in areas where the patient is remote (distant) from the physician, a form of diagnosis called telediagnosis. The quality of the information obtained from the electronic stethoscope compared very well with direct, or conventional, auscultation. The method brought the information, or data, to the physician using a modern and a standard telephone line. When pitted against direct auscultation, the electronic stethoscope missed some faint heart murmurs, so the standard stethoscope-—.which doesn'.t need electricity to work-—.remains valuable and widely used. Its portability, low cost, and ready availability make the stethoscope an ideal basic tool.

All Littmann® Stethoscope models in all colors may not be in stock at the time of your order. If we do not have it we will get it for you as quickly as possible. If you are in a rush please list an alternate color choice in the comment box at the bottom of the order page or write rush and we will notify you of any delay in your order via phone or email.

Offers a wide variety of stethoscopes to meet your auscultation needs. Whichever model you choose, you can depend on a Littmann

Stethoscope to provide years of superior performance and service. We at Sunshine Pharmacy believe 3MLittmann

A new ultrasound stethoscope ignores outside noise, allowing medics to hear life-saving sounds inside the body. Developed by electrical engineers, the device exploits the Doppler effect as it sends an ultrasound wave into the body. The change in frequency is converted into sound that medics can hear, with a clean, audible signal.

The roar of a fire truck. the whine of ambulance sirens. MedEVAC helicopters overhead. They're first at an accident scene, but they're also loud -- making some emergencies too noisy for paramedics and doctors to listen to a patient's vital signs with a stethoscope. You can't hear lung sounds. You can't hear heart sounds inside of a running helicopter, Donald Lehman, a flight paramedic with the Maryland State Police in Pikesville, tells DBIS. William Bernhard, an anesthesiologist and Master Flight Surgeon with the U. S. Army in Perryville, Md., says traditional stethoscopes do not work well because of all the outside noise that interferes with the sounds they're trying to listen to. Now a new, ultrasound stethoscope ignores outside noise, allowing medics to hear life-saving sounds inside the body. It's extremely helpful because it's the only thing out there on the market that will work, Bernhard tells DBIS. Developed by electrical engineers, the device sends an ultrasound wave into the body. When it hits moving organs -- like the heart or lungs -- it bounces back at a different frequency, called the Doppler effect. This change in frequency is converted into sound that medics can hear. The exciting thing now is that we have a simple, hand-held device and can be used in these very high noise environments and gives a very, very clean, audible signal, Electrical Engineer Adrian Houtsma, of the U. S. Army Aeromedical Research Laboratory (USAARL), tells DBIS. The new device is being field tested for the Army, where loud war zones make a standard stethoscope useless. helping save lives one sound at a time. Researchers like Houtsma are in the process of obtaining FDA approval for the device and are working to make sure it doesn't generate signals that interfere with aircraft or other equipment. It will first be manufactured to sell to the armed forces and could cost between 250 and 700. The traditional stethoscope has hardly changed since its invention in the 1800s by French inventor and physician Ren Thophile Hyacinthe Lannec.

BACKGROUND. A new type of stethoscope relies on ultrasound to enable doctors to hear the sounds of the body in extremely loud situations, such as during the transportation of patients in MedEVAC helicopters, or wounded soldiers in Blackhawk helicopters. HOW IT WORKS. These new ultrasound models transmit a sound signal into the patient's body. This sound is reflected back to the stethoscope at a slightly different frequency because it bounces off the internal organs, changing the sound wave pattern essentially, the Doppler effect. The difference in frequencies between the transmitted sound wave and the returning sound wave received by the instrument can be computed to determine the motion of the internal organs. This difference in frequency is then converted into audible sound. Ultrasound stethoscopes produce a markedly different sound than conventional ones. An acoustic stethoscope yields a 'lub-dub' sound from a heartbeat with the first beat being the strongest. An ultrasound stethoscope yields a 'ta-da-ta' pattern with the second beat being the strongest. THE PROBLEM. Traditional stethoscopes transmit and amplify sound within the range of human hearing. from 20 hertz to 20,000 hertz. Most body sound, such as that of the heart and lungs, fall into the 100 to 200 hertz range. Current acoustic stethoscopes detect and amplify vibrations that allow doctors to hear the heart and lungs better. However, they become difficult to use around 80 decibels -- a noise level comparable to an alarm clock or a busy street -- and are useless above 90 decibels. Modern electronic stethoscopes improved that threshold to 95 decibels by replacing the earpieces with loudspeaker inserts, which provide a better seal over the ear canal. They also have electrical cables instead of the conventional tubing, decreasing acoustic noise. But this is still not sufficient to make the instruments useful in very noisy environments. The ultrasound stethoscope is nearly impervious to loud noise and can make accurate readings at noise levels up to 120 decibels, similar to the volume experienced in the front row at a rock concert. THE DOPPLER EFFECT. Both sound waves and light waves exhibit the Doppler Effect. Just as a train whistle will sound higher as it approaches a platform and then become lower in pitch as it moves away, light emitted by a moving object is perceived to increase in frequency (a blue shift) if it is moving toward the observer. if the object is moving away from us, it will be shifted toward the red end of the spectrum. The Acoustical Society of America contributed to the information contained in the TV portion of this report.

A new type of stethoscope enables doctors to hear the sounds of the body in extremely loud situations, such as during the transportation of wounded soldiers in Blackhawk.

Sounding the chest with a cold stethoscope is probably one of the most commonly used diagnostics in the medical room after peering down the back of the throat while the patient says, "Aaaah". But a.

An electronic stethoscope that doubles as a virtual patient dramatically improved the accuracy of medical residents in identifying heart.

Direct amplification combined with fixed and adjustable filters blocks out excessive ambient noise and extraneous sounds which cause massive interference with conventional stethoscopes. This allows monitoring of a patient's condition and blood pressure during medevac or ambulance transportation.

A stethoscope is often seen as a symbol of a doctor's profession. it can also be used by safe-crackers and auto mechanics to hear sounds that otherwise could not be heard. Well, it's time to make a high-tech electronic spy stethoscope for under $25. We'll be using a stethoscope, which I picked up at a local drugstore and a pair of multimedia microphones.

I carefully un-assembled the microphones and ended up with two mini condensor microphones and 3 1/2 millimeter mini stereo plugs. I was surprised that the specs on these microphones are actually quite good. Then, I removed the earpieces from the stethoscope and drilled them out to match the microphone housings.

After some fine-tuning and a little hot glue, I reassembled the ear pieces and reassembled them on to the stethoscope. I plugged these ear pieces into a mini stereo Y adapter, and then into my MP3 player and I got ready to record what I heard.

I was amazed at the clarity of this spy stethoscope and now, instead of a regular stethoscope, I could actually record what I heard. I heard my wife on the telephone and decided to test it out on a wall. Sam, quit calling here. You're old enough to be my father. There's my high-tech electronic spy stethoscope for under $25.

Param name=movie value= />PARAM value=true name=allowFullScreen />PARAM value=always name=allowScriptAccess />embed src= quality=high width=400 height=345 type=application/x-shockwave-flash pluginspage= allowscriptaccess=always allowfullscreen=true>/embed>/object>br />a href= href= To Make A High-Tech Spy Stethoscope/a>" id="ctl00_ctl00_Wide_Main_Main_ContentTabs_ShareTab_ucContentShareTabEmbed_txtFilmEmbedCode" onclick="this. select()" style="width.284px" />

A pocket added to a scrub pant that is suitable for carrying an unfolded stethoscope. The outline of the pocket approximates, and is larger than, the shape of the unfolded stethoscope. The pocket totally encloses the stethoscope. The pocket provides a convenient, safe and sanitary place for a stethoscope.

I claim. 1. A pair of pants for use by medical workers comprising two leg portions and a lower body portion. a pocket attached to one of the leg portions for holding a fully extended stethoscope. Wherein the pocket has two sections, a first, upper section and a second lower section, the first section having a generally trapezoidal shape and the second section having an elongated rectangular shape, the upper section shape for accommodating the binaural end of the stethoscope and the lower section for accommodating the chest piece end of the stethoscope. 2. The pocket of claim 1 wherein said pocket completely encompasses the stethoscope when inserted in the pocket.

1. Field of the Invention This invention relates to a modification of a garment comprising an addition of a pocket convenient for carrying an unfolded stethoscope. 2. Background Information A stethoscope is an instrument, used by medical professionals, in auscultation to convey sounds in a chest or other parts of a body to an ear of an examiner. Current practice is for a person with a stethoscope to hook it around his or her neck, or drape it over his or her shoulders, or fold it and stuff it in a conventional pocket. These are inconvenient, unsafe, unsanitary, and not particularly stylish alternatives. It is desirable to have a convenient way to carry a stethoscope. As will be shown in the subsequent description of the preferred embodiment of the present invention, these and other shortcomings in the present state of the art are overcome.

The present invention is a modification to a garment comprising a pocket sized to carry an unfolded stethoscope completely contained in said pocket. In the preferred embodiment of the present invention, the pocket has an outline approximately the shape of said stethoscope, said outline being sufficiently larger than the shape of said stethoscope so as to permit ease of dropping said stethoscope into said pocket and removal of said stethoscope from said pocket. The invention, in the preferred embodiment, has a semi-circular bottom to match a bottom end of said stethoscope, which tends to ride on said bottom when said stethoscope is inserted into said pocket.

FIGS. 1 and 2 illustrate a preferred embodiment of the present invention, a stethoscope pocket 1 useful in the carry of an well known unfolded stethoscope 200 said stethoscope pocket 1 attached to a scrub pant 100 and forming a pouch 11. For purpose of definition, scrubs are garments used by hospital and medical workers of all genders that typically include shirts and pants. A well known pocket 101 is shown. FIGS. 1 and 2 illustrates a pair of such scrub pants 100. Said stethoscope pocket 1 further comprises a upper portion 14 with tapered sides 12 and a lower portion 13. In the preferred embodiment of the present invention, the pocket 1 has an outline approximating the outer shape of said stethoscope 200, said outline of said pocket 1 sufficiently large as to leave an inch or two of distance from the outer shape of said stethoscope and said pocket 1 outline. Said pocket 1 is sufficiently large so as to completely contain said stethoscope 200 when said stethoscope is dropped into said pocket 1. In practice, in the preferred embodiment of the present invention, said stethoscope 200 has a chest piece 202 which sits on a semi-circular bottom of the pocket 1. The stethoscope 200 tends to center in the pocket 1. The purpose of having the pocket 1 with an outline providing some distance between the pocket 1 and the stethoscope 200 is for ease of dropping said stethoscope 200 into said pocket 1. A purpose in having the pocket 1 large enough to completely contain the stethoscope 200 which further comprises at least one binaural 201 so the at least one binaural 201 does not snag on other objects, such as tables or desks, as said stethoscope 200 is being carried in said pocket 1. A purpose of having said pocket 1 with an outline approximating the shape of the stethoscope 200 is for economy of material usage in constructing said pocket 1. The preferred material of construction for said stethoscope pocket 1 is typically the same material as is used for the scrub pant 100. This could be a fabric such as cotton, nylon, or a blend of natural and artificial fibers. It could even be paper or plastic. Although the description above contains many specificities, these should not be construed as limiting the scope of the invention but as merely providing illustrations of some of the presently preferred embodiments of this invention. Thus the scope of the invention should be determined by the appended claims in the formal application and their legal equivalents, rather than by the examples given.

Headset The headset is the metal part of the stethoscope onto which the tubing is fitted. The headset is made up of the two eartubes, tension springs, and the eartips. All Littmann stethoscope headsets are set at an anatomically correct angle so that they fit correctly into the wearers ear canals. The wearer can adjust the tension to a comfortable level by pulling the eartubes apart to loosen the headset or crossing them over to tighten.

Eartip The Cardiology III Stethoscope is fitted with 3M Littmann Snap-tight soft-sealing eartips. Soft-sealing eartips offer increased comfort, seal and durability, and feature a surface treatment that increases surface lubricity and reduces lint and dust adhesion. Snap-tight soft-sealing eartips are available in small and large sizes in black and grey colours. The Cardiology III Stethoscope comes with an extra set of soft-sealing eartips plus a pair of firm grey eartips. The firm eartips are available in small and large sizes, grey colour.

Eartube The eartube is the part to which the eartips are attached. The Cardiology III Stethoscope is fitted with a ribbed eartube. Note. all Littmann stethoscopes manufactured after 1994 are fitted with a ribbed eartube that gives a Snap-tight fit between the eartube and eartips.

Tunable Diaphragm A traditional stethoscope consists of a bell and a diaphragm. The bell is used with light skin contact to hear low frequency sounds and the diaphragm is used with firm skin contact to hear high frequency sounds. Littmann stethoscopes patented tunable diaphragm technology alternates between bell and diaphragm modes with a simple pressure change on the chestpiece. Use light contact to hear low frequency sounds. Press firmly for high frequency sounds. The small side of the Cardiology III Stethoscope can be converted to a traditional bell. The tunable diaphragm can easily be replaced with the nonchill bell sleeve that is included with each stethoscope.

Stem The stem connects the stethoscope tubing to the chestpiece. On the Cardiology III Stethoscope the stem is used to index, or open, the side of the stethoscope that the practitioner wants to use.

Tubing The Cardiology III Stethoscope has double lumen tubing if you were to view a cross-section of the tubing you would see two openings. The tubing on all Littmann stethoscopes is manufactured from polyvinyl chloride (PVC). The tubing does not contain either natural rubber latex or dry natural rubber.

Chestpiece The chestpiece is the part of the stethoscope that is placed on the location where the user wants to hear sound. The chestpiece of the Cardiology III Stethoscope is an innovative design that offers a patented tunable diaphragm on each side of the chestpiece. The large side can be used for adult patients, while the small side is especially useful for paediatric or thin patients, around bandages and for carotid assessment.

Lights Sirens Medical Supplies, also offer Cardionics Electronic Stethoscopes, ADC Stethoscopes. We now offer PayPal as a payment option for our customers. Lights Sirens Medical Supplies is your online source for high quality medical supplies for the medical office and home healthcare. You find over 9,000 items like. wound care,

Tunable Diaphragm and Rim Assembly for Littmann Cardiology III (large side), Cardiology II S. E., Master Classic II, Classic II S. E. and Select Stethoscope

Snap-On Rim for Littmann Cardiology III (large side), Cardiology II S. E., Classic II S. E., Select and Lightweight Stethoscope

Floating Diaphragm (with Littmann logo) for Littmann Cardiology II, Cardiology, Classic II, Classic, Lightweight Stethoscope

Snap-On Rim for Littmann Electronic Model 4000, Model 2000, Cardiology III (small side) and Pediatric Stethoscope

Floating Diaphragm (with Littmann Logo) for Littmann Model 4000, Model 2000 and Classic II Pediatric Stethoscope

Headset The headset is the metal part of the stethoscope onto which the tubing is fitted. The headset is made up of the two eartubes, tension springs, and the eartips. All Littmann stethoscope headsets are set at an anatomically correct angle so that they fit correctly into the wearers ear canals. The wearer can adjust the tension to a comfortable level by pulling the eartubes apart to loosen the headset or crossing them over to tighten.

Eartip The Cardiology III Stethoscope is fitted with 3M Littmann Snap-tight soft-sealing eartips. Soft-sealing eartips offer increased comfort, seal and durability, and feature a surface treatment that increases surface lubricity and reduces lint and dust adhesion. Snap-tight soft-sealing eartips are available in small and large sizes in black and grey colours. The Cardiology III Stethoscope comes with an extra set of soft-sealing eartips plus a pair of firm grey eartips. The firm eartips are available in small and large sizes, grey colour.

Eartube The eartube is the part to which the eartips are attached. The Cardiology III Stethoscope is fitted with a ribbed eartube. Note. all Littmann stethoscopes manufactured after 1994 are fitted with a ribbed eartube that gives a Snap-tight fit between the eartube and eartips.

Tunable Diaphragm A traditional stethoscope consists of a bell and a diaphragm. The bell is used with light skin contact to hear low frequency sounds and the diaphragm is used with firm skin contact to hear high frequency sounds. Littmann stethoscopes patented tunable diaphragm technology alternates between bell and diaphragm modes with a simple pressure change on the chestpiece. Use light contact to hear low frequency sounds. Press firmly for high frequency sounds. The small side of the Cardiology III Stethoscope can be converted to a traditional bell. The tunable diaphragm can easily be replaced with the nonchill bell sleeve that is included with each stethoscope.

Stem The stem connects the stethoscope tubing to the chestpiece. On the Cardiology III Stethoscope the stem is used to index, or open, the side of the stethoscope that the practitioner wants to use.

Tubing The Cardiology III Stethoscope has double lumen tubing if you were to view a cross-section of the tubing you would see two openings. The tubing on all Littmann stethoscopes is manufactured from polyvinyl chloride (PVC). The tubing does not contain either natural rubber latex or dry natural rubber.

Chestpiece The chestpiece is the part of the stethoscope that is placed on the location where the user wants to hear sound. The chestpiece of the Cardiology III Stethoscope is an innovative design that offers a patented tunable diaphragm on each side of the chestpiece. The large side can be used for adult patients, while the small side is especially useful for paediatric or thin patients, around bandages and for carotid assessment.

Littmann Classic II Infant Stethoscope - 28 inch Length, 3/4 inch Bell - Littmann Classic II Pediatric and Infant Stethoscopes 3/4" bell Infant …. Compare prices

Littmann Classic II Infant Stethoscope - 28 inch Length, 3/4 inch Bell - Littmann Classic II Pediatric and Infant Stethoscopes 3/4" bell Infant …

The infant stethoscope has a 3/4-inch bell for an easier chestwall seal. Designed for infant auscultation. Patented tunable diaphragm assures high acoustic sensitivity. Features solid stainless steel chestpiece, single-lumen tubing, non-chill rims and soft sealing eartips. Benefits The solid stainless steel chestpiece on the 3M Littmann Classic II Infant Stethoscope

Is optimally sized for your little patients. The small diaphragms conform to the contours of pediatric and infant bodies. The snap-on rim will not rust or corrode. And unlike threaded rims, it will not come loose or fall off. There is also a crack-resistant, reinforced yoke that allows you to fold the scope easily into your pocket without kinking or breaking. The internal double-leaf binaural spring helps assure a long life and allows easy adjustment of eartube tension. The lightweight eartubes are durable and abrasion-resistant. They feature a nonchill rim on both the diaphragm and bell, so theres no need to warm them up. Plus, each stethoscope comes with patented 3M Littmann Snap-tight Soft-sealing Eartips designed to assure an excellent acoustical seal in the ear canal and maximize comfort. Three year warranty. Using Your 3M Littmann Classic II Infant Stethoscope The Littmann Classic II Infant Stethoscope assures you of high acoustic sensitivity and consistent frequency response without diaphragm stress from a too-tightly threaded rim. When using the stethoscope be sure to index between bell and diaphragm …

The location and movement of the hands mimic the action of using a stethoscope. View larger sign language videos on Signing Savvy

Tunable Diaphragm and Rim Assembly for Littmann Cardiology III (large side), Cardiology II S. E., Master Classic II, Classic II S. E. and Select Stethoscope

Snap-On Rim for Littmann Cardiology III (large side), Cardiology II S. E., Classic II S. E., Select and Lightweight Stethoscope

Floating Diaphragm (with Littmann logo) for Littmann Cardiology II, Cardiology, Classic II, Classic, Lightweight Stethoscope

Snap-On Rim for Littmann Electronic Model 4000, Model 2000, Cardiology III (small side) and Pediatric Stethoscope

Floating Diaphragm (with Littmann Logo) for Littmann Model 4000, Model 2000 and Classic II Pediatric Stethoscope

During this most recent CFM week, we finally got to break out our new stethoscopes we were given during our white coat ceremony back in August. Once we learned how to use the different features of our stethoscopes, we practiced giving each other cardiac and pulmonary exams during the first half of the week. To finish off the week, actual patients with cardiac or pulmonary conditions volunteered their time to have us examine them. There were numerous patients with ailments ranging from a heart murmur to pulmonary fibrosis. It was a wonderful experience to be able to see, listen, and feel how the conditions that we spend time studying in lectures and readings present in real people. It was also a good reminder of how many of the things we are learning are actually applicable in real scenarios, although we may not realize or think about it in the middle of reading hundreds of pages of notes. Another added benefit of this past CFM week is that now that I know how to correctly use a stethoscope, it is humorous to watch medical TV shows and sometimes see the doctors using them backwards!

1.INTRODUCTION There are many medical emergencies where patient examination with a stethoscope (auscultation) is of critical importance for the patients survival. In military settings, medical evacuation from the battle field by helicopter (during the critical hour) often involves casualties with acute injuries to heart and lung function. Auscultation is an important tool for assessing the integrity of heart muscle, valves, and major arteries while blood pressure may be determined in conjunction with a pneumatic cuff. Auscultation of the lungs can be essential when confirming the placement of endotracheal tubes or when diagnosing conditions such as a collapsed lung, asthma, or pulmonary edema. Fixed-wing medical transport flights are often of longer duration, and auscultation of body sounds becomes valuable in managing chronic conditions. The environment itself may lead to further medical complications. expansion of intestinal gases at high altitudes can be monitored by auscultation of bowel sounds. Rotary-wing and fixed-wing aircraft tend to be very noisy. Without doubt there would be great benefit to accurate, easy auscultation in the noisy medical transport environment. There are also non-military situations where auscultation in noisy environments can be an issue. Train wrecks or multiple-car highway accidents are examples where victims are often transported to hospitals in helicopters. Noisy public events like football games or pop concerts are scenes where it could be difficult for a physician to provide the right diagnosis and emergency treatment to a heart attack victim. Conventional acoustic stethoscopes are sensitive to noise from the immediate environment because it can invade the stethoscope in at least three different ways. It can enter through the earpieces, since these always have a finite amount of sealing power. It can enter through the acoustic tubing, since sound is always conducted through the tubing walls to some extent. The most sensitive entry point is the acoustic sensor, where environmental noise enters either directly through the housing or indirectly as a surface wave propagating along the skin of the patient. As a result, the maximum noise level in the environment that still allows successful auscultation is between 80 and 85 dB sound pressure level (SPL), dependent on details of stethoscope design and physicians skill. Modern electronic stethoscopes have raised the maximum tolerable environmental sound level to about 90-95 dB SPL. This is because ear pieces are replaced by insert loudspeakers that provide a better seal with the ear canal, and tubing is replaced by electrical cables that do not pick up acoustic noise. Transducers in the stethoscope head can be designed to optimize mechanical to electrical transduction of body sounds while minimiz-ing transduction of air-born sound from the environment. Modern electronic stethoscopes are, unfortunately, still inadequate for effective auscultation in brutal noise environments as described above. Noise levels in heavy-duty helicopters like the Black Hawk can go as high as 120 dB SPL. Noise levels at indoor sporting events and pop concerts can easily reach 100 dB SPL. To conquer these high noise levels, a totally different technology was added to the stethoscope design. In ultrasound imaging, a high-frequency (megahertz range) sound signal is generated, transmitted from the stethoscope head into the patients body, and reflections from moving body tissue are picked up by a receiver also located in the stethoscopes head. Since these reflections have a slightly different frequency than the transmitted signal caused by the Doppler effect, a difference-frequency can easily be computed and made into an audible sound. The advantage of this technique is that environmental noise, no matter how intense, does not interfere withthe heart or lung sound, since the latter is carried by a 2.3 MHz carrier signal and a helicopter, ambulance, or stadium crowd do not produce any interfering sound at this high frequency. There are significant differences between the sounds produced by a conventional and by an ultrasound-based stethoscope. That is because they are based on totally different physical principles, and represent different physiological processes. Where a conventional stethoscope yields a lub-dub sound for normal heart beat, the same heart beat heard through an ultrasound stethoscope will yield a ta-d-da pattern. Because of these differences, the new noise-immune stethoscope was designed on a hybrid two-in-one principle, where a conventional operation mode can be selected for quiet or moderately noisy environments, andultrasound opera-tion is selected in extreme noise conditions.

The new stethoscope is shown in Fig. 1. The top part of the device is the battery compartment, containing two 1.5V AA-cells. The device can be held between the index and middle fingers, with the thumb being free to operate a 4-button control panel. The finger space has been designed to fit an average hand covered with a standard UH-60 aviation glove. The bottom part contains the stethoscope sensors and the signal-processing electronics. For electromechanicaloperation, a stack of conventional piezoelectric disk elements is driven by a movable piston at the bottom (the head) of the device, designed as a mechanical transformer between chest tissue of the patient andthe piezo-electric stack. The purpose of this transformer is to maximize the mechanical energy transfer from the human body to the sensor stack, while minimizing energy transfer from air-born sound to the sensor stack. An O-ring, placed on the bottom surface of the stethoscope and surrounding the sensor, keeps out surface waves that can be excited on the patients skin by high-level environment noise or vehicle vibration. For ultrasound operation, two semicircle-shaped disks, made of piezoelectric material, are embedded in the sensor head, where one functions as a transmitter and the other as a receiver of high-frequency sound waves. For this mode of operation, a contact gel placed between the stethoscope head and the patients skin must be used to minimize ultrasound reflections at the sensor-skin boundary. A thumb-operated 4-button control panel allows the device to be turned on, the signal volume to be set, and the operating mode to be selected. This allows a physician to switch between modes during auscultation of a patient, as long as noise levels are not so high as to obscure conventional-mode auscultation. Switching could be important, since each mode of auscultation provides its own specific kind of information. The stethoscope has a single signal output jack that can feed a set of Communications Earplugs or other types of sealed insert earphones or headsets.

3. PERFORMANCE Heartbeat auscultation was performed by a trained physician on a single healthy male subject of average body size. The auscultation environment was a reverberant chamber, equipped with high-power sound equipment capable of producing UH-60 type noise of various intensity levels, and yielding an approximately diffuse sound field. The maximum intensity level that could be produced by the sound system was 120 dB SPL. The stethoscope was connected to a set of Communications Earplugs (CEPs) as shown in Fig. 2. With the earplugs inserted (providing one layer of environmental noise protection), the auscultatingphysician wore a standard HGU-56/P aviation helmet equipped with circumaural ear pads, providing a second layer of environmental sound attenuation. For comparison with a conventional acoustic 3M Littmann Cardiology III stethoscope, one ear piece of the Littmann was plugged to prevent environmental noise to enter the system, while the other ear piece was acoustically coupled to aBrel Kjr Type 4134 condenser microphone. This transformed the Littmann temporarily into an electronic stethoscope, yielding an electrical output signal. Digital recordings of heartbeat signals were made at 16-bit resolution and 8-kHz sampling rates, atbackground noise levels from 70 to 110 dB SPL in 5-dB steps. A selection of results, obtained at background noise levels of 70 and 100 dB SPL are shown in Fig. 3. Graphs represent 5-second samples of stethoscope output on an arbitrary linear amplitude scale. Figure 3a, taken from the Littmann, shows a clearly discernable and audible heartbeat at 70 dB noise and a totally obscured and inaudible heartbeat at 100 dB. Figure 3b, however, shows almost identical heartbeat signals for the 70 dB and 100 dB background noise conditions, with both signals being clean and clearly audible. Even in a background noise level of 120 dB SPL, the maximum that could be produced by the equipment, the ultrasound stethoscopes output remained essentially noise-free.

Figure 3a. Heartbeat signals at 70 dB (top), 100 dB (bottom) background noise levels, measured with a 3M Littmann Cardiology III stethoscope.

4. DISCUSSION Conventional passive acoustic stethoscopes are ineffective in noisy environments that exceed levels of 80-85 dB SPL. Even if noise-attenuating earmuffs are worn, with the stethoscope tubing being fed through the earmuff walls, the background noise would still invade the system through the stethoscopes sensor head. Ultrasound technology offers an auscultation mode that is essentially free of acoustic noise invasion from the environment. Auscultation in very noisy environments using this technology is limited only by the amount of hearing protection worn by the physician and by the maximum amount of sound that can be tolerated by the human ear. There always is, of course, some system noise associated with physical movement in the placement or orientation of the stethoscope head. This explains why measured signal-to-noise ratios in the output signal are not infinite but typically limited to about +20 dB. Finally, the use of ultrasound in auscultation offers other advantages besides providing an essentially noise-free signal. The signal also contains information that cannot be obtained with conventional acoustic or electro-mechanical stethoscopes. Ultrasound acoustic images contain artifacts of tissue movement that could be of interest to cardiologists or other specialists, if it can be shown that specific sound features are correlated with specific physiological anomalies. Such exploration is left for future research. DISCLAIMER Opinions, interpretations, and conclusions contained in this article are those of the authors and are not necessarily endorsed by the U. S. Army and/or the Department of Defense.

Using an electronic stethoscope with a small display, physicians can watch the changing waveforms of a beating heart

There was a time when physicians diagnosed heart ailments merely by listening. They'd place a stethoscope's chest piece against a patient, then apply a wealth of medical experience and acoustical knowledge to detect maladies ranging from murmurs to heart failures. Now, the venerable stethoscope may be re-claiming its place among medicine's best diagnostic tools. Thanks to the integration of digital processing and display technology, physicians can now use a stethoscope to “see” a heart's behavior, as well as hear it. With an attached PDA-sized display, they can watch the changing waveforms of a beating heart and make preliminary diagnoses in less time and at a fraction of the cost of an echocardiogram or more complicated tests. “It's a real step forward,” says

HD Medical Group Ltd., could one day serve as a triage tool in hospital emergency rooms. It could also take up residence in doctors' offices, where family physicians might employ it for patient screening. And it has already played a role in crowded Third World medical clinics that don't have easy access to more expensive diagnostic machines. “You don't need something incredibly complex to do triage,” says Damon Coffman, president and chief technical officer of HD Medical Group, developer of the new stethoscope technology. “If you just need a 'go' or 'no-go' decision, you don't need a full work-up or full diagnostics. This stethoscope will give you an answer without all the added cost and time.”

Arvind Thiagarajan, launched a student project to develop a device about the size of a fountain pen that could recognize heart anomalies. Thiagarajan's idea was for a physician to be able to point the device at a person's chest and have it identify various types of heart murmurs and other cardiac maladies. His studies eventually took him to Singapore, where he garnered funding and, ultimately, to Sri Lanka, where he put the device to the test in poorly equipped medical clinics after the Indian Ocean earthquake and tsunami in 2004. There, Thiagarajan made an impression on visiting physicians by quickly screening patients in the crowded clinic, ultimately identifying those who were in need of immediate care. “He would place his device on the patient and say, 'this baby has a aortic regurgitant murmur,' or whatever,” says Coffman. “After about three or four times being right, the doctors started looking to him for a quick diagnosis. They recognized that he could go through that entire crowded room of 200 kids in one hour and find the 10 who needed the most immediate help.” Since that time, Thiagarajan's idea has evolved into a product that might now make its way into the U. S. medical establishment. Today's version, which has changed some details over the past four years, still uses the same basic approach. Unlike a conventional stethoscope, HD's

TI MSP430 ultra-low-power microcontroller. From there, two signals are sent to the stethoscope's electronic display, one is sent to an optional laptop computer and the final one is re-constituted into an analog audio signal and sent to a speaker in the stethoscope tube, which enables the physician to hear the original heartbeat as it would have sounded before it was digitized. As a result, the doctor not only sees the waveform — he or she hears the heartbeat through the stethoscope's earpieces. HD engineers say they've worked hard to take Thiagarajan's original vision and evolve it into a product physicians will actually use. To accomplish that, Coffman and HD's engineers focused on simplicity. “Our first product ended up going out and then being brought back because we realized it was too complex,” Coffman recalls. Over time, HD's engineering team worked at minimizing the size and maximizing the simplicity of successive product iterations, Coffman says. Ultimately, the display was reduced to a mere 1.5 x 2.5 inches and its software was repeatedly simplified until doctors could obtain each diagnosis quickly and easily. “Today's product answers the questions, 'does the patient have a (heart) murmur?' and 'if so, what kind of murmur is it?'” Coffman says. Moreover, HD engineers worked with counterparts at

Texas Instruments to maximize battery life. Using TI's MSP430, they were able to reduce current consumption, during use and during standby. The MSP430, which serves as the main controller for the stethoscope, offers active power consumption as low as 160 µA/MHz and standby consumption of 1.5 µA/MHz. As a result, a physician can use the stethoscope through the course of an entire workday without worrying about the battery drain. TI engineers say HD also made use of the MSP430's feature integration. Because the MSP430 incorporates a number of built-in features, such as LCD drivers, analog peripherals and power management, it served as a means for placing more functionality into a smaller area. It also enabled HD to bring the ViScope 100 to market faster and make software changes for subsequent iterations on the fly. “When you're a start-up company like HD Medical and you're trying to bring your product to market quickly, you need a component that has the ability to kick-start your development,” says Matt Harrison, director of marketing for medical and high-reliability applications at Texas Instruments. “Having the LCD controller and analog peripherals of the 430 was a big advantage for them from a time-to-market perspective.” TI engineers say they also worked hand-in-hand with HD on the technical issues surrounding the analog-to-digital and digital-to-analog conversion of the stethoscope's sounds. “Unfortunately, we don't live in a digital world of 'ones' and 'zeroes,'” Harrison says. “We live in a real analog world and it's a tough place to be, especially when you're dealing with acoustic signals and a lot of amplification, as you have in this particular project.”

The resulting technology could be a boon to physicians in the U. S., as well as in Third World medical clinics. Cardiologists say it could help resurrect a testing procedure known as phonocardiology, in which physicians record the sound of a patient's heartbeat as a means of gathering information. Once considered a viable means of testing hearts, phonocardiograms fell out of favor because they were costly and difficult to do, and were therefore overshadowed by the echocardiogram and the electrocardiogram. The visual stethoscope, however, could help bring phonocardiography back because it's now simpler and far less costly than those other methods. HD's ViScope provides about 3 sec — usually three or four heartbeats — worth of audio information on the heart, displayed in waveforms on the unit's screen. “This brings the phonocardiogram back,” Schiller says. “The display is just like the displays we used to labor over 30 years ago. It's quite familiar to cardiologists who have worked with phonocardiograms.” Coffman says he expects the devices to be used by a few cardiologists, but more so by family doctors looking for a quick diagnosis, so they can determine whether to send a patient to a specialist. That's why HD already laid plans to add sophistication to the product, incorporating electrocardiogram capabilities, as well as an automated diagnostic procedure for doctors. Coffman says he expects the company to roll out those product generations in the next two years. In the meantime, cardiologists at the University of California, San Francisco have published research suggesting cardiac function can be better understood by reviewing audio recordings from devices like the ViScope. “This is just the beginning as far as I'm concerned,” Schiller says. “This could serve as a teaching tool and as a better way of understanding cardiac function. We've only begun scratching the surface here.”

Take Up Thy Stethoscope and Walk" is a song by British psychedelic rock band Pink Floyd, and appears on their debut album, The Piper at the Gates of Dawn (1967). This was Roger Waters' debut song-writing credit, continually building in speed until the end and featuring frantic guitar-work by Syd Barrett and manic keyboard parts by Richard Wright. The song's title is a reference to John 5.8 - "Jesus saith unto him, Rise, take up thy bed, and walk." Its morbid lyrics are quite unlike anything else on the album, the rest of which was penned by Barrett, but is characteristic of much of Waters' work. the clinical motif would recur in compositions like "Free Four" and "Comfortably Numb." Similarly, in "Sheep," we find more Biblical quotations adapted by Waters to fit the song. In what is probably a coincidence, the song parallels the title track to Waters's Amused to Death by beginning with the phrase "Doctor, Doctor."

NET Brand Stethoscopes are being exported all over the world in huge quantities. Please send us your specific requirements and we shall be glad to send our C. I.F. rates and samples. Our Stethoscopes are light weight complete with binaural frame fitted with plastic Ear pieces (Knobs), PVC (vinyl) tubing double sided - Open and Diaphragm Chest pieces. Each stethoscope is provided with one set of spare Ear pieces and a diaphragm. Stethoscopes and spare parts can also be supplied under individual labels. Pinard Foetal Heart Sthethoscopes in plastic and aluminium too are available at competative rates.

Stethoscope diamond, blue/red bright tube, tool finish strong chestpiece with built in non chill ring.

Stethoscope cardiology, double side chestpiece with diaphragm on both sides good pediatric. ade of aluminum.

Stethoscopes, Parts Accessories, Pediatric Stethoscope, Cardiology Stethoscope, Fetal Stehoscopes, Lithman Colored, Manufacturer, Supplies, India Trust NET brand for Surgical Instruments, Medical Supplies, Hospital Equipments, Laboratory Products Goods.

Several recent studies demonstrate that 5-10% of hospitalized patient acquire nosocomial infection, 5% of which are fatal. Epidemiologists believe that one third of all nosocomial infections can be attributed to stethoscope contamination. Further studies demonstrated that 90-100% of the stethoscopes harvest microbial contamination and that more than 20% were MRSA (methicillin-resistant staphylococcus aureus) and other lethal resistant species. The cleanliness of the stethoscope head is of great concern, especially in hospitals where infectious agents can pass easily from one patient to the next through contact with contaminants on a doctor’s stethoscope. The stethoscope head is particularly prone to contamination since it comes into physical contact with each patient. To date, no device has become universally accepted for performing stethoscope disinfection. To be practical, such a device has to be very easy and convenient to use, not requiring any extra amount of time or effort.

Stethoscopes are being used in wide scale by physicians, nurses, and medial students. The sum of the above reaches 3-4 million users in the US market alone, in hospitals and in private clinics.

A compact, personal stethoscope-head disinfecting device which the healthcare practitioner can wear on the shirt lapel, coat pocket or the stethoscope itself. The head of the stethoscope is returned to the device between every use. The device is pre-loaded with disinfectant which, upon return of the stethoscope inbetween every patient exam, results in its automatic disinfection. A number of devices are possible with dispensing mechanisms including adhesive disposable pads, spray and roller.

Say goodbye to rummaging through pockets for your penlight! This handy stethoscope light easily fastens to most standard stethoscopes—so it’s always conveniently close by. Simply squeeze the sides of the light and examine whatever you want with the extra light you need. Plastic Squeeze-to-light feature Button cell batteries included (and replaceable)

This light fastens easily and securely to most standard stethoscopes. Please note. it does not fit the Littmann Master Cardiology or Littmann Master Classic.

This light is a perfect fit for my scope and has a bright, almost halogen glow. I ordered more than one, and have given a few to coworkers. It is very handy for nightshift workers. No need to go hunting for a flashlight--it's right there. My first stethoscope light was a promo from a drug company and did not fit my Littman Cardiology III very well.

Very convenient. Black blends in well with my stethoscope and my chic friends are jealous. I should have been nice and bought an extra for them.

Stethoscope [Gr.,=chest viewer], instrument that enables the physican to hear the sounds made by the heart, the lungs, and various other organs. The earliest stethoscope, devised by the French physician R. T. H. Lannec in the early 19th cent., consisted of a slender wooden tube about 1 ft (30 cm) long, one end of which had a broad flange, or bell-shaped opening. When this opening was placed against the chest of the patient, the physician, by placing his ear against the opposite opening, could hear the sounds of breathing and of heart action. The stethoscope changed little until the beginning of the 20th cent. when the binaural instrument was developed by G. P. Cammann, a New York physician. It consisted of two earpieces with flexible rubber tubing connecting them to the two-branched metal chest cone. Thus the sounds could be heard with both ears, and the instrument's flexibility permitted the physician to listen to various areas without changing his position. Electronic stethoscopes make it possible for several clinicians to listen at the same time to the sounds emitted by a particular organ. Stethoscopy (also called auscultation), used together with percussion (light tapping of the chest), is a fundamental diagnostic measure in medical practice. The qualities of the sounds emitted by the lungs and heart denote the health or abnormality of these organs. Many diseases of the heart and lungs, and sometimes of the stomach, blood vessels, and intestines, can be recognized early by skillful use of the stethoscope. Bibliography. See study by M. D. Blaufox (2001).

Stethoscope." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved March 03, 2009 from Encyclopedia. com.

Stethoscope Definition The stethoscope is an instrument used for auscultation, or listening to sounds.heart sounds of developing fetuses in pregnant women. Purpose A stethoscope is used to detect and study heart, lung, stomach, and other sounds. Read more

Stethoscope The stethoscope is an instrument for listening to sounds originating within the.the sounds of her heart and her breathing quite distinctly. The stethoscope had been invented. Leannec experimented with various materials and. Read more

Stethoscope ( steth -ŏ.-skohp) n. an instrument used for listening to sounds within the body (see auscultation ). A simple stethoscope usually consists of a diaphragm or an open bell-shaped structure (which is applied to the body) connected by rubber. Read more

Stethoscope Instrument that enables an examiner to listen to the action of various parts of the body, principally the heart and lungs. It consists of two earpieces attached to flexible rubber tubes that lead to either a disc or a cone. Read more

Stethoscope Background A stethoscope is a medical instrument used to listen to sounds produced in.especially those that emanate from the heart and lungs. Most modern stethoscopes are binaural. that is, the instrument is intended for use with. Read more

Recognising doctors could be much harder in future. Moves to get rid of the white coat are already progressing in the UK and now it seems MP3 players could replace the venerable stethoscope (Telegraph, AFP, Times, CanWest, The Canadian Press). Using players’ built in microphones is as good if not better for listening to chest sounds than using a stethoscope, according to research from the University of Alberta in Canada. “The quality, clarity and purity of the loud sounds were better than I have ever heard with a stethoscope,” Neil Skjodt, a respiratory medicine expert from the university, told the European Respiratory Society’s annual congress in Stockholm. Skjodt was browsing in a store a couple of years ago looking for an electronic microphone and decided to use one built into an MP3 player. “That’s when I had my eureka moment and realized [the microphone from the MP3 player] was far better than anything I was carrying around in my pocket,” he said (CanWest). Another bonus of using digital music players is recordings can be sent to other doctors for a second opinion. This could be useful given previous research suggests some medical students have a “woeful lack of stethoscope skills” (press release, study).

Your Next Stethoscope Should be Electronic. Here's Why. (Littmann Electronic Stethoscope Model 3000 Review)

Last month, I reluctantly entered the market for a new stethoscope. (My old one broke. Don't ask.)For doctors, choosing a stethoscope is not a decision made lightly. it requires laying out a significant amount of cash for a device you might carry in your pocket for years. So, after researching stethoscopes online for a few days, I surprised myself by buying an electronic model — the 3M Littmann Electronic Stethoscope Model 3000 — and I couldn't be happier."Why an electronic stethoscope?" is a reasonable question, but a better one might be. "What prevented you from buying one before?" Here are the most common objections.

The price of electronic stethoscopes has fallen dramatically in recent years. As of this writing, the Littmann Model 3000 is $287 on Amazon. Compare this with the price of the Littmann Cardiology II, which is $156. What does this $131 difference get you? The amplification of the Model 3000, according to the website, is "up to 18 times greater than the best non-electronic stethoscope." And the ambient noise reduction technology cancels out "an average of 75% of distracting room noise."That sounds great, but does it actually make a difference? To test the performance of the Model 3000, an internal medicine resident and I listened to the heart of a patient with hypertrophic obstructive cardiomyopathy. We each auscultated the patient's murmur with both a conventional acoustic stethoscope and the Model 3000 — but to level the playing field, we placed the electronic stethoscope on the patient's hospital gown and placed the acoustic stethoscope directly on the patient's skin. We heard the patient's murmur

With the electronic stethoscope on the patient's clothes than we did with the acoustic stethoscope on bare skin. In an ideal situation, could you pick up all the murmurs you might hear with the electronic Model 3000 with a conventional acoustic stethoscope? Sure — but there are no ideal situations. Hospitals are noisy, it's sometimes difficult to position patients properly to listen to their heart and lungs, and doctors are often rushed. At the very least, the electronic stethoscope provides an added level of assurance that you haven't missed any significant findings. If you view the physical exam as a test, then the electronic stethoscope significantly increases the test's sensitivity without decreasing its specificity. If you see 20 patients a day, 5 days a week, for 48 weeks a year, in 2 years you will have used your stethoscope on patients 9600 times. For the Littman Model 3000, that is the equivalent of an extra 2 cents per physical exam. Is this worth it? If the average physician makes $50 per hour — and feel free to check my math, here — 2 cents is worth about a second of their time. So if an electronic stethoscope saves you more than a second per patient — and I would argue that it does — it's worth buying. Even so, I wasn't fully convinced the Model 3000 was worth it until I showed it to another resident. She placed the chestpiece on her heart — over her clothes, mind you — and listened. Her eyes widened. "Oh my god," she said, "I have mitral valve prolapse. I was never able to hear it before." And I listened too. She was right. Even through her clothes, you could clearly hear the mid-systolic click. What do you think? Has anyone else had positive or negative experiences with electronic stethoscopes? Are there compelling reasons not to get one?(Also posted on The Efficient MD.)

During this most recent CFM week, we finally got to break out our new stethoscopes we were given during our white coat ceremony back in August. Once we learned how to use the different features of our stethoscopes, we practiced giving each other cardiac and pulmonary exams during the first half of the week. To finish off the week, actual patients with cardiac or pulmonary conditions volunteered their time to have us examine them. There were numerous patients with ailments ranging from a heart murmur to pulmonary fibrosis. It was a wonderful experience to be able to see, listen, and feel how the conditions that we spend time studying in lectures and readings present in real people. It was also a good reminder of how many of the things we are learning are actually applicable in real scenarios, although we may not realize or think about it in the middle of reading hundreds of pages of notes. Another added benefit of this past CFM week is that now that I know how to correctly use a stethoscope, it is humorous to watch medical TV shows and sometimes see the doctors using them backwards!

Use the device with the rich sound and a great feel. Our stethoscopes are precisely machined for exceptional performance and robust durability.

The Single head stethoscope is preferred by Cardiologists for monitoring heart sounds. It has a wide frequency range and the thick dual tube delivers a clear clean sound. Specs Purchase "..acoustics are sharp"

The Cardiology Performance dual head stethoscope is perfect for listening to subtle heart sounds and murmurs. The heavier conical head and the thick dual tube deliver a clear clean sound. Specs Purchase

We use a conical stainless steel chest piece, a large premium diaphgram, angled soft ear pieces, and thick bilumen tubes. The result is the best sound and looks in a cardiology stethoscope. Our stethoscopes match the quality of the premium brand. To see what makes a great scope click here.

The Dual Head Stethoscope is a traditional versatile general purpose device. The diaphragm mode is used for heart sounds while the bell mode is used for lower frequency lung sounds. Specs Purchase. ".great value and quality!"

Treat yourself to a cardiology quality steel stethoscope with soft ear tips. You will love the clear sounds and great looks. We back our products with an unconditional money back guarantee. Compare us to the market leaders such as Littmann.

The model is also known as a di-echoscope. The special patented diaphragm allows the user to modify the frequencey response of the device by changing the pressure on the head. When the diaphragm is pressed the diaphragm Snaps into the bell mode. The back of the head has a pedaitric sized diaphgragm. Some users will prefer the ease and convenience of this device. However, the majority of users may prefer the traditionla style stethoscopes. Specs Purchase

The Pediatric stethoscope has a smaller 35mm diaphragm and a 25mm bell. The smaller head allows the user to auscultate with more precison. However the smaller head also results in a smaller acoustic signal. Available in blue only. Specs Purchase

Your Next Stethoscope Should be Electronic. Here's Why. (Littmann Electronic Stethoscope Model 3000 Review)

Last month, I reluctantly entered the market for a new stethoscope. (My old one broke. Don't ask.)For doctors, choosing a stethoscope is not a decision made lightly. it requires laying out a significant amount of cash for a device you might carry in your pocket for years. So, after researching stethoscopes online for a few days, I surprised myself by buying an electronic model — the 3M Littmann Electronic Stethoscope Model 3000 — and I couldn't be happier."Why an electronic stethoscope?" is a reasonable question, but a better one might be. "What prevented you from buying one before?" Here are the most common objections.

The price of electronic stethoscopes has fallen dramatically in recent years. As of this writing, the Littmann Model 3000 is $287 on Amazon. Compare this with the price of the Littmann Cardiology II, which is $156. What does this $131 difference get you? The amplification of the Model 3000, according to the website, is "up to 18 times greater than the best non-electronic stethoscope." And the ambient noise reduction technology cancels out "an average of 75% of distracting room noise."That sounds great, but does it actually make a difference? To test the performance of the Model 3000, an internal medicine resident and I listened to the heart of a patient with hypertrophic obstructive cardiomyopathy. We each auscultated the patient's murmur with both a conventional acoustic stethoscope and the Model 3000 — but to level the playing field, we placed the electronic stethoscope on the patient's hospital gown and placed the acoustic stethoscope directly on the patient's skin. We heard the patient's murmur

With the electronic stethoscope on the patient's clothes than we did with the acoustic stethoscope on bare skin. In an ideal situation, could you pick up all the murmurs you might hear with the electronic Model 3000 with a conventional acoustic stethoscope? Sure — but there are no ideal situations. Hospitals are noisy, it's sometimes difficult to position patients properly to listen to their heart and lungs, and doctors are often rushed. At the very least, the electronic stethoscope provides an added level of assurance that you haven't missed any significant findings. If you view the physical exam as a test, then the electronic stethoscope significantly increases the test's sensitivity without decreasing its specificity. If you see 20 patients a day, 5 days a week, for 48 weeks a year, in 2 years you will have used your stethoscope on patients 9600 times. For the Littman Model 3000, that is the equivalent of an extra 2 cents per physical exam. Is this worth it? If the average physician makes $50 per hour — and feel free to check my math, here — 2 cents is worth about a second of their time. So if an electronic stethoscope saves you more than a second per patient — and I would argue that it does — it's worth buying. Even so, I wasn't fully convinced the Model 3000 was worth it until I showed it to another resident. She placed the chestpiece on her heart — over her clothes, mind you — and listened. Her eyes widened. "Oh my god," she said, "I have mitral valve prolapse. I was never able to hear it before." And I listened too. She was right. Even through her clothes, you could clearly hear the mid-systolic click. What do you think? Has anyone else had positive or negative experiences with electronic stethoscopes? Are there compelling reasons not to get one?(Also posted on The Efficient MD.)

Description.With its innovative design, this stethoscope is the ultimate in acoustical performance. The traditional bell mode and diaphragm mode have been incorporated into a dual chestpiece which lets you hear both high and low frequency sounds. There are no moving parts to wear out or leak sound. Black.

During this most recent CFM week, we finally got to break out our new stethoscopes we were given during our white coat ceremony back in August. Once we learned how to use the different features of our stethoscopes, we practiced giving each other cardiac and pulmonary exams during the first half of the week. To finish off the week, actual patients with cardiac or pulmonary conditions volunteered their time to have us examine them. There were numerous patients with ailments ranging from a heart murmur to pulmonary fibrosis. It was a wonderful experience to be able to see, listen, and feel how the conditions that we spend time studying in lectures and readings present in real people. It was also a good reminder of how many of the things we are learning are actually applicable in real scenarios, although we may not realize or think about it in the middle of reading hundreds of pages of notes. Another added benefit of this past CFM week is that now that I know how to correctly use a stethoscope, it is humorous to watch medical TV shows and sometimes see the doctors using them backwards!

Stethoscope. An instrument used to transmit low-volume sounds such as the heartbeat (or intestinal, venous, or fetal sounds) to the ear of the listener. A stethoscope may consist of two earpieces connected by means of flexible tubing to a diaphragm placed against the skin of the patient. The stethoscope has become one of the symbols of the medical profession. The origins of the stethoscope can be traced back to the French physician, Laënnec, who invented a crude model in 1819. It has undergone many modifications since then. The original consisted of a wooden box that served to help physicians hear the sounds within the chest cavity. From the French "stethoscope" which was created from "stethos" (meaning chest in Greek) + scope.

[Gr.,=chest viewer], instrument that enables the physican to hear the sounds made by the heart, the lungs, and various other organs. The earliest stethoscope, devised by the French physician R. T. H.

In the early 19th cent., consisted of a slender wooden tube about 1 ft (30 cm) long, one end of which had a broad flange, or bell-shaped opening. When this opening was placed against the chest of the patient, the physician, by placing his ear against the opposite opening, could hear the sounds of breathing and of heart action. The stethoscope changed little until the beginning of the 20th cent. when the binaural instrument was developed by G. P. Cammann, a New York physician. It consisted of two earpieces with flexible rubber tubing connecting them to the two-branched metal chest cone. Thus the sounds could be heard with both ears, and the instrument's flexibility permitted the physician to listen to various areas without changing his position. Electronic stethoscopes make it possible for several clinicians to listen at the same time to the sounds emitted by a particular organ. Stethoscopy (also called auscultation), used together with percussion (light tapping of the chest), is a fundamental diagnostic measure in medical practice. The qualities of the sounds emitted by the lungs and heart denote the health or abnormality of these organs. Many diseases of the heart and lungs, and sometimes of the stomach, blood vessels, and intestines, can be recognized early by skillful use of the stethoscope.

Polymer gives doctors a custom stethoscope. (Tycos Instruments uses DuPont Engineering Polymers' Hytrel G3548W to manufacture custom fit stethoscopes)(Assembly in Action)

Just about all health care providers have need of stethoscopes. Whether you’re a nurse, respiratory therapist or a medical doctor, the need to auscultate the chest, lungs and heart is a necessary and important part of your work. In deciding from the many stethoscopes to choose from it’s important to keep in mind what you’ll be using your stethoscope for. For general purpose listening, stethoscopes are excellent tools and come at a very good price. Cardiologist may like to choose from stethoscopes that can record sounds that can later be played back on their computer. Comfort when using stethoscopes. Many people don’t realize that a stethoscope and actually be uncomfortable to use if the ear pieces are not soft. Obtaining the right ear piece that is soft and comfortable is very important if you plan to use your equipment frequently. Generally, the thicker the tube, the better sound conduction you’ll experience. stethoscopes come in both single and double tube models. The single tube splits into two separate tubes while the double tube model stethoscopes send sound waves to each ear through a single tube, possible allowing for better sound interpretation. If you work in the health care field you'll need medical supplies to help you with your work. Quality products that you know you can depend on will give you greater confidence during stressful situations.

The Other Side of the Stethoscope"By Paula Hartman CohenPhysicians, for all their knowledge about health, sometimes fall prey to serious illness and injuryand find themselves on the receiving end of the stethoscope. Or individuals with experience as a patient sometimes decide to enter medicineand become the person wielding the stethoscope. In either case, their patients often benefit.

PDF VersionPrinter-Friendly Version Page. 1 2 3 4 5 6 7 8 The Other Side of the Stethoscope Physicians, for all their knowledge about health, sometimes fall prey to serious illness and injuryand find themselves on the receiving end of the stethoscope. Or individuals with experience as a patient sometimes decide to enter medicineand become the person wielding the stethoscope. In either case, their patients often benefit. By Paula Hartman Cohen

25 February 2009 Lebowakgomo, South Africa. It was in 2005 that I came across the UNV Limpopo Doctors programme, designed to assist the province’s various health facilities through the provision of specialist doctors where there were critical shortages. The news brought about fond memories of my first encounter with a Belgian volunteer with whom I worked for a short period in one rural hospital in Ethiopia at an early stage of my career. I was just out of medical school at the time and was hoping to land a job in one of the big towns and enjoy the respect and financial rewards for all those tough times at medical school. The medical school armed me with knowledge about thousands of diseases and how to diagnose and treat them. But my first month at work was really the time I learned what it all meant to be a doctor. I found out that my daily routine ranged from administrating the hospital to getting my queue of patients in the morning. My work also required me to constantly liaise with town elders, for whom I was the trusted advisor and confidant in all matters related to health and social development issues. I still vividly recall young children brought to me by parents seeking my advice on the advantages of education. The support and guidance of my Belgian volunteer colleague was of paramount importance in those early days of my career. Given the above background and subsequent experiences, I was pretty confident and felt appropriately qualified for the South Africa project. In addition, being an assistant professor and a consultant anaesthesiologist in a university hospital and my understanding of volunteerism prepared me well for the task awaiting me ahead. On my arrival in South Africa for the first time in 2005, I was lucky enough to attend the UNV annual meeting which provided me with the opportunity to learn more and get the overall picture of the project I was to join. The then UNV Programme Officer Mr. Alex Rusita informed us, during an orientation meeting, that the UNV volunteers had a crucial role in supporting new Government policy initiatives and priorities to improve service delivery in all sectors of the economy. This struck a chord in my mind and reminded me of my first rural practice. gave me a hunch that my stethoscope and magic gas may not be the only things I needed for the mission ahead. I still have a fresh recollection of my arrival day in my new home, almost four years ago, Lebowakgomo Hospital in the rural township of Limpopo Province about 250 km from the South African administrative capital, Pretoria. It was a new hospital constructed in 1999 and run mostly by new graduate doctors. I was given a wonderful welcome reception fit for a king. The head of the hospital took me around various sections of the hospital and guided me to important locations I must know in the township, which actually were the marketplace, petrol station and the road to the next big town. On my first introductory meeting with the doctors I was shocked to learn the unacceptable high rate of anaesthetic complications the hospital was facing, especially involving maternal anaesthetic complications. I could see the relief and appreciation my arrival had stirred among the young doctors. I was given a chance to introduce myself to the hospital staff and proudly said that I am an anaesthetist by profession and a UNV volunteer. The first question I received was. Did a UNV volunteer assignment mean that I was stationed for a short time only? It was with this encounter that I started my primary role of advocating for volunteerism. The task of establishing and building up the anaesthesia unit kept me busy for the first months. The eagerness and dedication of the operation staff and doctors to provide better care and equip the hospital to handle the challenges faced day by day made it possible to quickly pass the first hurdle. I was able to markedly reduce the rate of anaesthetic referral cases to tertiary hospitals. the establishment of paediatric anaesthesia played a big role. In addition a regular pre- and post-anaesthetics care service and strengthening of critical care follow-up rooms in each ward had a sound impact in improving patient care. My early days in the hospital used to be hectic and full of dramas in the theatre. Being on call for emergency anaesthesia throughout the month is not an easy task. The calls to my house in the middle of the night to attend to failed intubation, resuscitation, and numerous other complications used to be a daily occurrence. My accommodation, which was advantageously located 120 steps from the operation theatre, was my running field during those nights attending to emergencies. The telephone calls and sometimes the banging on my door in the middle of the night followed by the urgent voices of nurses informing me of a critical situation in the theatre and urging me to come and rescue the situation used to be so common that sometimes I just slept wearing my operation theatre's green attire. I am happy to say these things are history now. most doctors are well enough equipped in basic anaesthesia skills to address emergencies. In a town where recreational facilities are non-existent, my evenings and weekends are mostly spent in one of the hospital corridors with an Internet connection. My routine evening schedule is well known among the doctors. a welcome regular interruption is when interns and doctors come for informal consultations and to discuss challenging patients. My corridor office gave me a vantage point to see my colleagues coming to hospital in their free time to help out with emergency cases or just revisit their critical patients. I trust volunteerism always starts at home and I strongly believe that this is just a first step to future volunteerism. The opening of an Intensive Care Unit, in 2006-7, was a milestone in the history of our hospital. In addition the hospital managed to successfully organize and run a two-month interns' training and a one-month community doctors' training in anaesthesia which I am very proud off. This accomplishment has earned the hospital a well deserved recognition as an internship training centre. Furthermore, expansion of service delivery programmes and accreditation of the hospital to a district level one hospital was the priority in this period. I was given the task of developing policies, management guidelines, treatment protocols and teaching manuals for anaesthesia, the intensive care unit and the emergency unit (out-patient unit) and upgrading of this unit to attain the scope set for the level one district hospital. As a result of the sustained hard work by the management and staff, the hospital was accredited as the first health facility in September 2008 and recognized by the Council for Health Service Accreditation of South Africa (COHSASA) among more than 42 health facilities in the province. On 29 October 2008 I was awarded the best anaesthetist achievement award for outstanding performance and lasting contribution on innovation in the public service. I believe this honour bestowed on me was not only in recognition of my personal contribution but also was an endorsement to all the UNV volunteers working in the province. In my heart I will always be indebted to UNV for giving me this opportunity to apply my knowledge and experience for the benefit of society, live and work among the South African people and learn their beautiful cultures. As it is beautifully expressed in local languages I would like to end by saying 'Re a Leboga!' (thank you!) to UNV.

1) Stethoscope. I picked mine up at a local drug store (Walgreens) for $10 2) A pair of Stereo Multimedia Microphones. Chosen because of the low cost and decent specs. $12

I used a small dot of hot glue and inserted the microphones into the earpieces and then reassembled the earpieces on the Stethoscope.

Great idea! Do you have any plans for making a portable electronic stethoscope? I use one at work, but my hearing is bad, so I need one to amplify sounds.

Hey kip. great idea, just one thing. the stethoscope dosen't have stereo. the same sound comes up the tube and splits into two ear pieces. I. E. you get the same sound in both ears. you only need to use one mic.

Each of the two mics is getting half the input volume because they're sharing it. No boost at all. One mic would work better, and you might as well place it right at the stethoscope sender, without the tube.

Tags. tech offbeat, spy, stethoscope, hack, mod, snoop, kipkay license. Attribution-NonCommercial-ShareAlike

This study will characterize the accuracy of a commercially available artificially-intelligent stethoscope in determining which childhood murmurs suggest underlying congenital structural heart disease and therefore warrant diagnostic echocardiograms.

Sensitivity of the Artificially-Intelligent Stethoscope as compared with that of Pediatric Cardiologists in determining which patients needed echocardiograms because they have congenital structural heart disease [TimeFrame.Not applicable. all data collection for any given patient will be completed within less than 12 hours--usually MUCH less than 12 hours.] [Designatedassafetyissue.No]

Specificity of the Artificially-Intelligent Stethoscope as compared with that of Pediatric Cardiologists in determining which patients needed echocardiograms because they have congenital structural heart disease. [TimeFrame.Not applicable. all data collection for any given patient will be completed within less than 12 hours--usually MUCH less than 12 hours.] [Designatedassafetyissue.No]

After subjects' medical visits are complete, the heart sounds of all subjects will be recorded and assessed by an artificially-intelligent stethoscope. Attempts will be made to make satisfactory 20-second recordings from a total of eight positions on the chest with the patient in supine and upright positions.

The kit has a Mabis professional aneroid sphygmomanometer plus a color-coordinated Classic II S. E. stethoscope together in a matching, full-sized, carrying case.

The Trusts Medical Physics team has been awarded a prestigious The Engineer Technology and Innovation Award 2008 for developing an acoustic device, the Smart Stethoscope, which is used to help treat kidney stones more effectively.

Currently many kidney stones are treated by lithotripsy, which uses thousands of shock waves focussed onto the kidney stones to shatter them into small pieces, which can then be dissolved by drugs or passed from the body in urine. However, there is a high failure rate with this procedure with between 30 and 50 per cent of patients needing further treatment because clinicians have no effective way of knowing whether the treatment is breaking the stone. The 'Smart Stethoscope' device has an acoustic sensor which identifies the echoes reverberating around the body from each shock wave. These echoes are then analysed by computer software created by the team, to give a clear assessment of the effectiveness of the treatment. The device was developed by Dr Andrew Coleman and Dr Fiammetta Fedele who worked with Professor Tim Leighton from Southampton University and Andrew Hurrell from Precision Acoustics Ltd. It is clinically proven to be more effective than any previously available technology. Dr Coleman said. "We are proud to have received this award in recognition of our work in developing this device. Clinical staff like to use it because they can easily identify when the stones are breaking and so can tailor each treatment accordingly, rather than having to give a standard number of shocks. The device not only saves time but also saves the patient from going through unnecessary pain associated with long treatment." The 'Smart Stethoscope' is now being manufactured by Precision Acoustics Ltd who have received orders from around the world.

NET Brand Stethoscopes are being exported all over the world in huge quantities. Please send us your specific requirements and we shall be glad to send our C. I.F. rates and samples. Our Stethoscopes are light weight complete with binaural frame fitted with plastic Ear pieces (Knobs), PVC (vinyl) tubing double sided - Open and Diaphragm Chest pieces. Each stethoscope is provided with one set of spare Ear pieces and a diaphragm. Stethoscopes and spare parts can also be supplied under individual labels. Pinard Foetal Heart Sthethoscopes in plastic and aluminium too are available at competative rates.

Stethoscope diamond, blue/red bright tube, tool finish strong chestpiece with built in non chill ring.

Stethoscope cardiology, double side chestpiece with diaphragm on both sides good pediatric. ade of aluminum.

Stethoscopes, Parts Accessories, Pediatric Stethoscope, Cardiology Stethoscope, Fetal Stehoscopes, Lithman Colored, Manufacturer, Supplies, India Trust NET brand for Surgical Instruments, Medical Supplies, Hospital Equipments, Laboratory Products Goods.

Your name or message can be engraved on any model stethoscope in your choice of text font (typeface) for only $17.95, with no extra charge for additional text. Click to preview your name in any chosen font.

View & Purchase Description.2009 Metacardia LT.10 has the highest fidelity frequency response of any stethoscope, combining astonishing loudness with uncompromising clarity. External noise cancelling and artifact eliminatingRead More.

View & Purchase Description.2009 Epicardia VsT-P model (750 series) features now includes new snap-on anti-microbial adult and pediatric tunable diaphragms. And, VSAVR (Voluble Stethoscope Acoustic Vestibule Reflector). a new, Read More.

3M and Littmann are registered trademarks of the 3M Corporation, ADC is a registered trademark of the American Diagnostic Corporation, Hewlett Packard is a registered trademark of Hewlett Packard, Tycos and Welch Allyn are registered trademarks of Welch Allyn, DRG is a registered trademark of Doctor's Research Group. www. stethoscopes. com is Internet fulfillment service of Stethoscopes Plus. Inc, 7683 SE27th Street, Suite 146, Mercer Island, WA 98040, USA. e-mail. us Design and Miva Website Programming by PCINET, LLC

AND Medical / LifeSource is a leading manufacturer of home health care products, including automatic and manual blood pressure monitors, digital thermometers and stethoscopes. All contents us. A&D Medical, All Rights Reserved. By using this site, you agree to our Legal Notice and Privacy Policy. Powered by Webb Consulting

The stethoscope is a medical device used to listen to sounds produced in the human body. It is mostly used to listen to a persons breathing or the pounding of the heart. It is also used to listen to intestines as well as the flow of blood through the arteries and veins. The stethoscope was invented by René-Théophile-Hyacinthe Laënnec in 1816 in France. This was monaural and was made of wood. The binaural stethoscope was invented in 1851 and is the standard design followed till today. Differential stethoscopes that could create a slight stereo effect were invented by 1853. These weren?t very popular with medical practitioners. There are two basic types of stethoscopes - acoustic and electronic. Acoustic stethoscopes are well known. they operate by transmitting sound from the chestpiece, through the hollow tube, and finally into the listeners ears. There are two parts to the chestpiece i. e.. the diaphragm and the bell, either of which could be placed against the body. The bell emits low frequency sounds, while the diaphragm emits high frequency sounds. This two sided stethoscope was developed by Rappaport and Sprague in the early 1920s. The sound level of the acoustic stethoscope is extremely low, making diagnosis difficult. The electronic stethoscope increases the level of the sound by amplifying it. It converts the analog sounds made by the body into digital signals, which can then be amplified and processed. The simplest form of this type of stethoscope is a microphone placed against the body. This is not full proof as it picks up ambient sounds as well. The latest stethoscopes make use of a piezoelectric crystal. This is placed on the head of a metal shaft. the other end of the shaft is in contact with diaphragm. The stethoscope is used to diagnose various dieses and conditions in patients. Before the use of stethoscopes, doctors used to place their ears on the patients body hoping to hear something. They are symbolic to the overall look of a doctor, as doctors are often seen with a stethoscope round their neck. Stethoscopes are also used by mechanics to isolate particular sounds of running engines to detect malfunctions.

Reader said. Just thought I'd give a heads-up to whoever edited this piece. wherefore means why, not where. So your headline essentially says "Why are you stethoscope?" The scene in Romeo and Juliet is actually Juliet lamenting that Romeo is a Montague, and therefore forbidden to her.