Final answer:
Auscultation is a technique used to measure blood pressure using a sphygmomanometer and a stethoscope. Different sounds known as Korotkoff sounds indicate specific pressure values, with the first sound representing systolic pressure and the last sound representing diastolic pressure.
Step-by-step explanation:
Auscultation is the technique used to measure blood pressure using a device called a sphygmomanometer and a stethoscope. The process involves wrapping an inflatable cuff around the patient's arm and gradually reducing the pressure in the cuff while listening for specific sounds called Korotkoff sounds. The first sound heard, known as the first Korotkoff sound, indicates the systolic pressure, while the point at which the last sound is heard represents the diastolic pressure.