What condition is monitored by the presence of a thrill in an AV fistula?

The presence of a thrill in an arteriovenous (AV) fistula is a critical indicator of blood flow adequacy. A thrill is a palpable vibration or rush of blood that can be felt over the fistula site, signifying that there is a good flow of blood from the artery into the vein. This is particularly important for patients undergoing dialysis, as the effectiveness of the fistula in providing sufficient blood flow is essential for the dialysis process.

Monitoring the thrill helps to ensure that the AV fistula is functioning optimally. If the thrill diminishes or is absent, it may indicate issues such as reduced blood flow due to vessel stenosis or thrombosis, which could compromise the effectiveness of dialysis treatment. Thus, regular assessment of the thrill is a vital component of monitoring the AV fistula's functionality.