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One sample of ivenix administration set was returned for evaluation.No defects were observed during visual inspection.The gold foil corresponded to the specific code set-0021-25.During the microscopic evaluation liquid drops were coming out of the ivenix unit from the resistor knob.An underwater leak test was performed, and a leak was detected, bubbles were observed coming from the flow dial area.During the autopsy of the resistor knob the seal was found positioned inverted on the pump side.The customer complaint is confirmed.The root cause could be related to improper placement of the seal (wafer side up).Also, the adjustment method used in primary lube was incorrect and lacked standardization following the mgs implementation, which led to insufficient detection sensitivity for improperly positioned seals due to the reduced translucency of the new cassettes.An internal investigation was opened to address this issue.The current process controls detection include 1) 100% leak and occlusion test is performed through the leak and occlusion test machine in order to capture units with any blockage or leak failure mode, 2) quality sampling for final physical testing, for performing a flow and underwater leak tests, 3) 100% visual inspection during the manufacturing process and final physical inspections, 4) primary lube machine detects the correct position of the seal at the knob.The batch review could not be performed as the affected batch was not provided.
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