(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Evaluation summary: visual inspections were performed on the returned device.The reported difficult to deploy was unable to be confirmed as the device was returned disassembled and the thumbwheel gear was not returned.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 other similar incidents from this lot.The investigation determined the reported difficulty appears to be related to circumstances of the procedure as it is likely that the noted kink on the shaft occurred during procedure which contributed to the reported difficulty deploying the stent.Based on the information reviewed, there is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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