What does the term "sphygmomanometer" refer to?

The term "sphygmomanometer" specifically refers to an instrument used to measure blood pressure. This device typically consists of an inflatable cuff that is placed around the arm and a pressure gauge that displays the pressure readings, which are expressed in millimeters of mercury (mm Hg). Blood pressure measurement is crucial for assessing cardiovascular health and diagnosing conditions such as hypertension.

In contrast, the other options refer to different measurements: temperature is measured by a thermometer, oxygen levels are assessed using a pulse oximeter or blood gas analyzer, and heart rate is typically measured with a stethoscope or an electrocardiogram (ECG). Understanding the specific functions of medical instruments is vital for accurate measurements and patient care in a healthcare setting.