Should a venipuncture be performed on the arm with a fistula?

No, a venipuncture should not be performed on the arm with a fistula, as this could damage the fistula and compromise its function for dialysis. The fistula is specifically designed to provide access for hemodialysis, and using that arm for venipuncture can lead to complications such as thrombosis or infection. It's essential to use the opposite arm for blood draws or any other procedures.