The correct option is Sphygmomanometer.
Explanation
Arterial blood pressure is the lateral pressure exerted by circulating blood upon the walls of blood vessels. The measurement of this pressure involves determining the systolic (contraction) and diastolic (relaxation) pressures using specific medical instrumentation.
Option Analysis:
- Sphygmomanometer is correct: A Sphygmomanometer is the standard instrument used to measure arterial blood pressure. It consists of an inflatable cuff to collapse and then release the artery under the cuff in a controlled manner, and a mercury or mechanical manometer to measure the pressure.
- Stethoscope is incorrect: A Stethoscope is an acoustic medical device used for auscultation, or listening to internal body sounds (such as heartbeats or breathing). While it is often used in conjunction with a sphygmomanometer to detect Korotkoff sounds during measurement, it does not measure pressure itself.
- Glucometer is incorrect: A Glucometer is a device used to measure the concentration of glucose in the blood, primarily for managing diabetes mellitus.
- Electroencephalograph is incorrect: An Electroencephalograph (EEG) is an instrument used to record the electrical activity of the brain.
Key Takeaway:
The Sphygmomanometer is the primary device for quantifying blood pressure, distinguishing it from the stethoscope, which is used to listen to the sounds of blood flow.