A patient in (b)(6) was treated with therapeutic plasma exchange (tpe) using a prismaflex tpe2000 set and a prismaflex machine.The prismaflex set was primed using 3300 ml saline prior to start of treatment.Approximately 30 minutes after the start of treatment the prismaflex machine generated a blood leak alarm.Reportedly, air was noticed in the venous chamber and an external blood leakage was observed at the arterial pod.The treatment was discontinued without returning the extracorporeal blood to the patient resulting in an estimated blood loss of 175 ml.The patient's clinical condition post event remained unchanged.
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