What does a bruit in an extremity with an AV fistula indicate?

A bruit in an extremity with an arteriovenous (AV) fistula indicates patency. The presence of a bruit, which is a whooshing sound heard with a stethoscope over the site of the fistula, signifies that blood is flowing freely through the fistula. This is an important assessment finding as it confirms that the fistula is open and functioning properly, allowing for effective blood flow during procedures such as dialysis.

The detection of a bruit is a routine part of monitoring AV fistulas. It assures healthcare providers that there is adequate blood flow between the artery and vein involved in the fistula. If the bruit were absent or diminished, it could suggest possible complications, such as blockage or thrombosis, highlighting the significance of a positive bruit in the assessment of an AV fistula's function. This sound indicates that the fistula is not only patent but also operating as intended for the patient’s renal replacement therapies.