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The account reported finding backflow, and the customer stated that fluid was backing up in the tubing.No sample or photo was received for investigation; finished good production records were reviewed, and the vendor did not find any discrepancies or defects in their production records or retained samples that could contribute to the defect described by the customer.Based on the complaint details and investigation, the complaint cannot be confirmed, and root cause has not been identified or determined because no picture or sample was provided for evaluation.The division will continue to monitor the issue for trending, and if a sample, photo, and/or additional information becomes available, this complaint will be reopened to be further investigated.There were no reports of death, serious injury, medical intervention, or follow up care.It has been determined that the reported event could cause or contribute to serious injury if it were to occur again.In an abundance of caution, this is a reportable event.If additional information becomes available this report will be reopened and reevaluated.This medical device report (mdr) is being submitted as part of retrospective review activities, which include review of historical data in accordance with regulations at 21 cfr part 803.The information included in this mdr reflects the information reasonably known to the manufacturer at the time of this retrospective review and submission.
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