The difference in time between ejection of blood and the first Korotkoff sound in the brachial artery at the antecubital fossa is about (choose the best answer - obviously none are right on the money)
A) 1 ms
B) 0.01 s
C) 0.1 s
D) 1 s
E) 5 s

Question

Quizplus · Accepted Answer

The first Korotkoff sound, which is heard when taking blood pressure with a sphygmomanometer, occurs due to the turbulent flow of blood as it starts to pass through the partially compressed artery. This sound is heard shortly after blood is ejected from the heart, and the most accurate approximation among the given options is 0.1 seconds (C), as the delay accounts for the time it takes for the pressure wave to travel from the heart to the point of measurement and for the blood flow to become turbulent enough to produce an audible sound.

The Difference in Time Between Ejection of Blood and the First