How to use a stethoscope

Stethoscope, mainly composed of pickup part (chest piece), conduction part (hose) and listening part (ear piece), put on the ear tube, pull the ear tube of the stethoscope outward, tilt the metal ear tube forward, and put the ear tube into your external auditory canal, so that the ear sinus and your ear canal can be closed tightly. If you wear it correctly, but the tightness between the sinuses and the ear canal is not good and the auscultation effect is not good, please auscultate it poorly when the sinuses and the ear canal are not tightly closed. For example, if the ear tube is worn backwards, it will be completely inaudible. When auscultating the heart, the membrane-type listening head can listen to high-frequency sounds well, and the cup-type listening head is suitable for listening to low-frequency sounds or murmurs. Modern stethoscopes are all double-sided stethoscopes. There are both membrane stethoscope and cup stethoscope, and the conversion between them only needs to rotate 180 degrees. There is also a patented technology called floating membrane technology, which can change the membrane stethoscope into a cup stethoscope in a special way to listen to low-frequency noise. Normal and abnormal lung sounds belong to high-frequency sounds, and lung auscultation can only be done with membrane listening head.