Question

Which of the following is a non-invasive method to measure blood pressure?

• A. Sphygmomanometer
• B. Electrocardiogram
• C. Pulse oximeter
• D. Stethoscope

Hint:

A sphygmomanometer is typically used in conjunction with a stethoscope to measure blood pressure manually.

Answer 1

The Correct Option is A

A sphygmomanometer is a non-invasive medical device used to measure blood pressure. It measures the pressure in the arteries when the heart pumps blood and when it rests between beats. 
Step 1: Understanding Non-Invasive Methods. 
Non-invasive methods do not require insertion into the body. They simply involve external devices that measure bodily functions or conditions. Step 2: Examining the Options.
(a) Sphygmomanometer: This is the correct answer. It measures blood pressure externally without breaking the skin.
(b) Electrocardiogram: This measures the electrical activity of the heart, not blood pressure.
(c) Pulse oximeter: This measures the oxygen saturation of the blood, not blood pressure.
(d) Stethoscope: While a stethoscope is used to listen to heart sounds and blood flow, it does not directly measure blood pressure. 
Step 3: Conclusion. 
A sphygmomanometer is the correct tool for non-invasive blood pressure measurement. Thus, the correct answer is (a) Sphygmomanometer.