Final answer:
A sphygmomanometer is the device used to measure indirect arterial blood pressure, and it consists of an inflatable cuff, a pump, and a gauge.
Step-by-step explanation:
The monitoring device used to obtain indirect arterial blood pressure is a sphygmomanometer. This device includes an inflatable cuff that wraps tightly around the upper arm, a rubber bulb to inflate the cuff, and a gauge to measure the pressure. The cuff is inflated to a pressure higher than the patient's expected systolic pressure, which temporarily halts blood flow in the arm's artery. As air is slowly released from the cuff, the first sound of blood spurting back through the artery indicates the systolic pressure, and when the sound stops, it indicates the diastolic pressure. These are typically heard through a stethoscope and the pressures are recorded as a ratio, such as 120/80 mm Hg, where 120 represents systolic and 80 represents diastolic pressure.