It was reported that the procedure was to treat a lesion located in the left anterior descending artery and the obtuse marginal artery that was tortuous but not calcified.The lesion was in a bifurcation; therefore, a double guide wire technique was used.Guide wire wrapping occurred due to confirmed operator error which caused resistance during advancement of the 2.75 x 15 mm xience alpine stent delivery system (sds).Resistance was also felt during retraction of the sds from the patient due to the wrapping issue and it was observed that 3 mm of the distal shaft had lifted and separated from the hypotube at the guide wire exit notch; however, the device is confirmed to be still in one piece.The sds was able to be removed by itself leaving the guide wires in place.Another xience sds was used to complete the case.No adverse patient effects or clinically significant delay in the procedure were reported.Another sds was used to complete the case successfully.No additional information was provided.
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(b)(4).Evaluation summary: the device was returned for analysis.Visual, dimensional, and functional inspections were performed on the returned device.The difficult to position and remove the guide wire was not confirmed.The damage to the shaft was confirmed.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 incidents from this lot.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.The investigation determined the reported difficulties appear to be related to circumstances of the procedure.
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