It was reported that the procedure was to treat a lesion in the circumflex (cx) artery, middle third, with de novo, heavy calcification and mild tortuosity.The 2.5x12mm xience sierra stent delivery system (sds) failed to cross the lesion and was noted with resistance in the recoil, creating difficulties in the removal.The physician confirms the anatomy contributed significantly in the resistance during advancement but does not know whether it is just the anatomy.There was resistance with the anatomy upon removal.The sds was removed independently.Upon removal, the stent was noted to be flared in the proximal part.Another xience sierra was used to complete the procedure.There was no adverse patient effect and there was no clinically significant delay in the procedure.No additional information was provided.
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The device was returned for analysis.The reported material deformation was confirmed.The reported failure to advance and difficulty to remove could not be replicated in a testing environment as they were both related to operational context of the procedure.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 appear to be related to circumstances of the procedure.There is no indication of a product quality issue with respect to manufacture, design or labeling.H6: medical device problem code 2682 was removed.
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