Investigation - evaluation: a review of the complaint history, device history record, instructions for use (ifu), manufacturing instructions,quality control, and visual inspection of the returned device was conducted during the investigation.A document-based investigation was performed.There is no evidence to suggest the finished product was not made to specifications.Review of the device history record of the finished product shows no nonconforming events that would contribute to this failure mode.There were no other reported complaints for this lot number.The blue sheath was returned with the separated fitting.Investigation revealed a 7.0mm sheath flaring, which is according to spec.A similar test fitting was attached to the complaint sheath and even by strong 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.It is the understanding that the filter was successfully retrieved, since reported that the no additional procedure was required.Per the ifu: excessive force should not be used to retrieve the filter.Based on the information provided, examination of the returned product and the results of our investigation; the root cause was determined to be the product receiving excessive pressure.Per the risk assessment, no further action is required.Appropriate personnel have been notified and monitoring will continue to be performed for similar complaints.
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