Stethoscopes are sound-conducting instruments to be used for auscultation of body and organ sounds, especially of heart and lung; meaning they are used in order to diagnose illness of internal organs.In medical science, doctors or other trained medical professionals use a stethoscope in order to assess sounds and noises linked with the function of heart, lung and bowel. During blood pressure measurement, a stethoscope is used to capture Korotkow blood flow murmur (Korotkow sounds) leading to determination of systolic and diastolic blood pressure.
A mechanical listening device designed for listening to sounds from the heart, lungs, and/or gastrointestinal tract. It typically comprises a membrane at the listening head connected by a split "Y" tube to the headgear with ear olives that are placed into the users ears. Mechanical stethoscopes are typically found in two variants 1) a general-purpose stethoscope used for clinical/ward activities; or 2) a reinforced stethoscope used by cardiologists.