Investigation summary: one connecting tube and 050010 were received.The stent and remaining set components were not returned.Connecting tube ctu-10-30-nstc and 050010 adapter are part of the set for sipsf-040018-5.9.The end of the connecting tube had a 050010 adapter attached to the male luer lock adapter (mlla).The adapter did not have a black o-rings inside the cap.During investigation, it was found out that the missing o ring in the adapter caused the customer's difficulty.Review of production and quality documentation did not observe any specific issues with current manufacturing or quality controls that may have contributed to this incident.Current controls for manufacturing are in place to assure functionality and device integrity prior to shipping.Based on the investigation evaluation, there is an indication that a process-related failure mode contributed to this event, however a specific root cause could not be determined.Relevant personnel have been notified and monitoring of this complaint issue has been instituted.We will notify the appropriate personnel and continue to monitor for similar complaints.Per the quality engineering risk assessment no further action is required.
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