(b)(4).Internal file number - 370890/1-1: during processing of this complaint, attempts were made to obtain complete event, patient and device information.Evaluation summary: visual and functional inspections were performed on the returned device.A review of the lot history record revealed no manufacturing nonconformities that would have contributed to this complaint.Additionally, a review of the complaint history of the reported lot revealed no other similar incidents.The investigation was unable to determine a cause for the reported difficulty.It is possible that the noted bends and separation of bare wire core resulted in the reported difficulty advancing.A cause for the damage could not be determined.It may be possible the tip of the bare wire was entrapped in the vessel causing the core to separate during retraction; however, with the limited information provided, this could not be confirmed.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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It was reported that during the procedure it was observed the removal of the supporting wire, preventing the advancement through the internal carotid after crossing the lesion.There were no reported adverse patient effects and there was no reported clinically significant delay in the procedure.No other damage was noted to the nav6 embolic protection system.No additional information was provided.Return device analysis identified that the bare wire core was separated 2.7 cm proximal to the step.The coils were still intact, not separated.The core was bent 1 mm proximal to the separation.
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