A student nurse wants to know why a bruit is heard and a thrill palpated at the site of an AV fistula used for dialysis. Which response by the nephrology nurse is the most appropriate?
A.
Abnormal findings signaling complications
B.
Flapping of the AV valve during circulation
C.
Small blood clots blocking some blood flow
D.
Turbulent blood flow through the fistula
ANS: D
Blood flowing through an AV fistula goes from a high-pressure system into a low-pressure system during circulation, leading to turbulent flow. It is a normal finding and not caused by the AV valve or small blood clots.
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