What tool is used to measure blood pressure?

A sphygmomanometer is specifically designed to measure blood pressure. It consists of an inflatable cuff, a measuring device (which can be digital or analog), and often includes a valve to release air from the cuff slowly. The measurement process involves wrapping the cuff around the patient's arm and inflating it to constrict blood flow in the artery. As the cuff deflates, the healthcare provider listens with a stethoscope for the sound of blood returning to the artery. This is known as Korotkoff sounds, which allows for the determination of systolic and diastolic blood pressure readings.

Other tools mentioned serve different purposes. A thermometer measures temperature; a pulsometer typically refers to devices that measure pulse or heart rate but not blood pressure; and a stethoscope is employed to listen to internal body sounds, such as heartbeats and breath sounds, but is not itself used to measure blood pressure without the presence of a sphygmomanometer. Understanding the different tools and their specific functions is crucial for effective patient care.