What is the abnormal flow rate for a radial artery/cephalic vein dialysis fistula?

In a dialysis fistula, particularly one created between the radial artery and the cephalic vein, the flow rate is vital for adequate dialysis function. Normal flow rates for a functioning fistula typically exceed 200 ml/min, often reaching levels between 400 and 600 ml/min.

When considering the abnormal flow rate, a rate of less than 200 ml/min indicates insufficient blood flow, which can lead to complications in dialysis treatment and may suggest potential issues with the fistula, such as stenosis or thrombosis. Therefore, stating that the abnormal flow rate is less than 200 ml/min highlights a critical threshold that, when not met, requires further evaluation and possibly intervention to restore adequate dialysis function.

Thus, identifying less than 200 ml/min as the abnormal flow rate is consistent with clinical understanding of the typical function required from a dialysis fistula and underscores the importance of maintaining sufficient flow to ensure effective dialysis treatment.