![]() 1c: The latest generation of stethoscopes is electronic and uses a microphone system and speakers to restore sounds ( adapted from the chapter: Advances and Perspectives in the Field of Auscultation, with a Special Focus on the Contribution of New Intelligent Communicating Stethoscope Systems in Clinical Practice, in Teaching and Telemedicine. Traditionally, the sound is transmitted in an aerial way via a conduit. Using a specific interface (diaphragm or bell), a sound is picked up and then transmitted over a small distance to the user’s ears. ![]() 1b: The stethoscope is a system of transmission and amplification of sound by resonance. Not only did this enable him to listen to internal noises without being in direct contact with his patient, but it also provided a much stronger and clearer perception of the noises.ġa: Doctor René-Théophile-Hyacinthe Laennec, inventor of the stethoscope. Doctor Laennec also built the first paper-based (a cone made out of 24 sheets of paper) and wood-based stethoscopes ( Fig. In 1817, Laennec created a new technique he labeled “ auscultation médiate”, meaning auscultation through a medium ( Traité de l’auscultation médiate, Paris, 1817) ( Fig. Up to the beginning of the 19 th century, doctors still examined their patients this way, pressing the ear to the thorax to listen to the noises within. have been uncovered describing listening to sounds inside the body as a way to learn about illnesses. Papyrus records from the 17 th century B.C. Įvaluation of the sounds produced by the human body can be traced back as far as ancient Egypt. Respiratory sounds include all the invaluable information concerning the physiology and pathology of lung and airway obstruction. Distinguishing between normal respiratory (lung) sounds and abnormal ones (such as crackles and wheezes) is crucial for establishing an accurate medical diagnosis.
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