Baxa exactamix 2400 valve set - 24-port valve assembly found to have "leaking" number 4 port.Port had potassium acetate 2meq/ml 50 ml vial attached.Compounding technician noted bubbles entering the vial during the sterile water flush at the end of tpn compounding.The 6ml from the vial were unaccounted for.Tpn's compounded prior to the discovery were re-made for the neonatal population.Upon removal of the valve set the underside of port 4 was noted to be turned counterclockwise more so than the "normal" position.The side of the port facing the outside wall of the housing was noted to be pinched inward as well which could have happened during the initial set up process that day.Valve sets are changed at approximately 1100 each day.The time of discovery was approximately between 1400 and 1600.
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