The stethoscope is a medical instrument used to listen to sounds inside the body, such as: heart,breathing, and intestines. The stethoscope was created by the French sician Renac in 1816 and published in 1819. The stethoscope is an important method for doctors to examine patients and diagnose diseases. Since the stethoscope was used in clinical practice, there have been continuous improvements in shape and sound transmission, but its basic structure has not changed much, mainly consisting of the sound pickup part (chest piece), the conduction part (rubber tube) and the hearing part (ear piece).
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