Flush bag was properly primed and hung by technicians at 13:19.At 16:02, physician noted air in the tubing distal to the clamp and proximal to the 3 way stopcock.No air entered the patient.The entire flush was taken down.Examination of the pressure bag/heparin flush revealed full inflation and proper heparin flush bag placement within the pressure bag.Further examination of the bag was performed after the case, flushing the air out of the line successfully and clamping the distal end of the tubing.No air was seen, but air appeared within ~ 15 seconds.This is suspicious for a micro-fracture of the tubing, allowing air to enter the tubing.Tubing came from medline neuro ir drape pack-lf, reorder no dynjo780244k, lot 161k0429.
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