What is the significance of detecting a thrill and bruit in an AV fistula?

A. It shows that the access site is not safe for dialysis: The presence of a thrill and bruit does not indicate danger; instead, it signals that blood flow is adequate. An unsafe access would be suspected if no thrill or bruit is present, suggesting poor patency. B. It suggests a blockage in the access site: A blockage would diminish or eliminate the thrill and bruit rather than create them. Detecting these signs means blood is moving effectively through the fistula without significant obstruction. C. It confirms the maturation of the access site: A palpable thrill and an audible bruit are expected findings that confirm adequate blood flow and fistula maturation. These signs indicate that the fistula is functioning well and is ready or preparing for use in hemodialysis. D. It indicates the presence of an infection: Infection of an AV fistula is characterized by redness, warmth, swelling, pain, or purulent drainage. A thrill and bruit are not infection signs but rather vascular flow indicators confirming patency.