Patient¿s age was reported as ¿early 50¿s¿.Patient¿s weight was reported as ¿average weight¿.A review of the complaint history, device history record, manufacturing instructions, instructions for use (ifu), quality control, and visual inspection of the returned device was conducted during the investigation.The blue sheath with separated hub was returned.The sheath tip was severely damaged and an investigation revealed a sheath flaring that is out of specification.However, pulling the sheath out of the hub may have affected the flaring dimension.A similar test fitting was attached to the complaint sheath; by strongly pulling, the fitting did not slip the sheath.Based on these findings, it is suggested that the device was exposed to strong pulling/manipulation during the filter retrieval procedure.Ifu state that excessive force should not be used to retrieve the filter.There is no evidence to suggest the finished product was not made to specifications.Review of the device history record shows no nonconforming events that would contribute to this failure mode.There were no other reported complaints for this lot number.Based on the information provided and the results of our investigation, the root cause was determined to be excessive force applied to the device.Per the risk assessment, no further action is warranted.Monitoring will continue to be performed for similar complaints.
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