Which vital sign is measured using a sphygmomanometer?

Blood pressure is the vital sign measured using a sphygmomanometer. This device is specifically designed to assess the pressure of blood within the arteries. It typically consists of an inflatable cuff that is wrapped around the upper arm and a gauge that displays the pressure readings. By inflating the cuff to restrict blood flow and then gradually releasing the pressure, the sphygmomanometer allows healthcare providers to determine both systolic and diastolic blood pressure values.

In contrast, heart rate is assessed through methods such as palpation of the pulse or using an electrocardiogram, respiratory rate is observed by counting breaths over a set period, and body temperature is typically measured using thermometers. Each of these vital signs has its own designated instruments and methods, but blood pressure specifically requires a sphygmomanometer for accurate measurement.