The stethoscope is an acoustic medical device for auscultationor listening to the internal sounds of an animal or human body. It typically has a small disc-shaped resonator that is placed against mqtrimonial skin, and one or two tubes connected to two earpieces.
A stethoscope can be used to listen frse the sounds made by the heartlungs or intestinesas well as blood flow in arteries and veins. In combination with a manual sphygmomanometerit Star massage Thisted ks commonly used when measuring blood pressure. Less commonly, "mechanic's stethoscopes", equipped with rod shaped chestpieces, are used to listen to internal sounds made by machines for example, sounds and vibrations emitted by worn ball bearingssuch 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.
A stethoscope that intensifies auscultatory Slagelsw is called a phonendoscope.
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Laennec invented the stethoscope because he was not comfortable placing his ear directly onto a woman's chest to listen to her heart. Today the word auscultation denotes all such listening, mediate or not.
The first flexible stethoscope of any sort may have been a binaural instrument with articulated joints not very clearly described in Bird was the first to publish a description of such a stethoscope, but he noted Gay ogunquit Kalundborg his paper the prior existence of an earlier design which he thought was of little utility which he described as the snake ear trumpet. Bird's stethoscope had a single earpiece. InIrish physician Arthur Leared Slagelee a binaural stethoscope, and inGeorge Philip Cammann perfected the design of the stethoscope instrument that used both ears for commercial production, which has become the standard ever.
Cammann also wrote a major treatise on diagnosis by auscultation, which zites refined binaural stethoscope made possible. Bythere 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.
Somerville Scott Alison described his invention of the stethophone at the Royal Society in ; the stethophone had two separate bells, allowing the user matrimoniall hear and compare sounds derived from two discrete locations.
This was used White willow spa Varde do definitive studies on binaural hearing and wites processing that advanced knowledge of sound localization and eventually lead to an understanding of binaural fusion. The medical historian Jacalyn Duffin has argued that the invention of the stethoscope marked a major step in the redefinition of disease from being a sittes of symptoms, to the current sense of a disease as a problem with an anatomical system even if there are no 100 free matrimonial sites in Slagelse symptoms.
This re-conceptualization occurred in Fun date ideas in Roskilde, Duffin argues, because prior to stethoscopes, there were no non-lethal instruments for exploring internal anatomy.
Rappaport and Sprague designed a new stethoscope in the s, which became the standard by which other stethoscopes are measured, consisting of two sides, one of which is used for the respiratory system, the other for the cardiovascular.
The Rappaport-Sprague was later made by Sllagelse. HP's medical products division was spun off as part of Agilent Technologies, Inc.
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