What device is commonly used to measure blood pressure?

A sphygmomanometer is the commonly used device for measuring blood pressure. It consists of an inflatable cuff that is wrapped around the upper arm and a manometer to measure the pressure within the cuff. When the cuff inflates, it temporarily stops blood flow in the artery. As the pressure in the cuff is gradually released, the healthcare provider can listen with a stethoscope to determine the systolic and diastolic pressures, which are the key components of blood pressure readings.

The other devices listed have different functions: a glucometer is used to measure blood glucose levels, a thermometer is utilized to measure body temperature, and a pulse oximeter measures the oxygen saturation in the blood. Each of these devices serves a distinct purpose in the healthcare setting, but for assessing blood pressure specifically, the sphygmomanometer is the accurate and standard tool.