Which side of the stethoscope is best for listening to Korotkoff sounds during a blood pressure reading?

The bell side of the stethoscope is best for listening to Korotkoff sounds, which are used to determine blood pressure. This is because the bell is designed to pick up low-frequency sounds, allowing for clearer auscultation of the subtle but distinct sounds associated with the blood flow in the arteries during cuff inflation and deflation. These sounds become audible when the pressure in the cuff is released and blood begins to flow again, providing important information about systolic and diastolic pressures.

While the diaphragm can be used for various sounds, including high-frequency sounds like those heard in the lungs or heart, it is less effective for the lower-frequency Korotkoff sounds. Therefore, using the bell provides a more accurate reading during blood pressure measurements, ensuring that health care professionals can correctly assess a patient's cardiovascular status.