What complication should a technician assess for if a patient reports their fistula arm feels "funny" and "asleep"?

When a patient reports that their fistula arm feels "funny" or "asleep," it typically indicates a concern about blood flow and potential complications associated with the fistula. Thrombosis, which refers to the formation of a blood clot within the blood vessel, is a critical complication to consider, especially if there is compression affecting blood flow. If the blood flow is compromised due to a thrombus, the arm may experience symptoms such as numbness or a tingling sensation, reflecting the inadequate circulation.

In this scenario, assessing for thrombosis is essential, as it directly relates to the fistula's function and the vascular integrity of the arm. Timely identification of thrombosis can allow for interventions to restore patency and blood flow, preventing further complications for the patient.