(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Date of event - estimated.Evaluation summary: visual and functional analysis were performed on the returned device.The reported loose or intermittent connection was not confirmed; however, the device was returned with a hypotube separation.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that may have contributed to this event.Additionally, a review of the complaint history identified no other similar incidents from this lot.The investigation was unable to determine a conclusive cause for the reported difficulty or for the noted hypotube separation.There is no indication of a product quality issue with respects to the design, manufacture or labeling of the device.
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