Machine alarm s.A.D.10 minutes after starting patient on dialysis.Tubing, machine and connects all looked over without any obvious cause for alarm.Staff was unable to clear or reset alarm and machine became "stuck" in s.A.D.Alarm mode.Staff had to hand crank machine to return pt blood.Patient remained unharmed though.Machine was then restrung with new lines.This particular incident, with machine becoming stuck in s.A.D.Alarm mode has happened three times in the unit today using lines from the same lot number.
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