The customer reported a bulge in the pumping segment of the set installed in channel a.This module had been infusing ns at kvo but was then turned off to run an infusion on channel b; the line was not clamped.Vidaza was administered on channel b at an unspecified rate via a short primary set that was connected to the primary set in channel a at the port just below the pump.When the vidaza administration was complete in channel b, channel a was then turned on to infuse a normal saline flush and it immediately alarmed for a channel error.When the nurse opened the pump door of channel a, ballooning was noted in the pumping segment just below the upper fitment.It was reported that no iv push had been given prior to the channel error, no pressure bags were used, the patient¿s central line gave a positive blood return, and all clamps were checked and unclamped before pressing start.There was no patient harm.
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