(b)(4).Internal file number - (b)(4): during processing of this complaint, attempts were made to obtain complete event, patient and device information.Evaluation summary: a visual and dimensional inspection was performed on the returned device.The reported shaft detachment was confirmed.The reported difficult to position could not be tested due to the condition of the returned device.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no similar incidents from this lot.The investigation determined the reported difficulties and subsequent treatment appear to be related to the operational context of the procedure, as it is likely the stent delivery system, which was not properly supported or coaxially aligned, interacted with the guide catheter/guideliner, as resistance was noted, which contributed to the reported difficult to position.Further manipulation while advancing/retracting the device contributed to the reported shaft separation.There is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.The 3.5x16mm graftmaster covered stent referenced is being filed under a separate medwatch report.
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