(b)(4).Internal file number - (b)(4): during processing of this complaint, attempts were made to obtain complete event, patient and device information.The device was not returned for analysis.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 did not indicate a lot specific quality issue.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.
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It was reported that the 3.5x15 mm xience alpine stent delivery system (sds) reached the ostial lesion in the predilated, right coronary artery.The sds was being positioned and met resistance with the mild calcification when the stent dislodged from the sds.A small dilatation catheter was advanced around the dislodged stent and the stent was pulled into the tip of the guide catheter with the inflated dilatation catheter.The guide catheter was retracted into the introducer sheath at the groin when the stent became stuck in the sheath.It was suspected that the stent became flared with the calcium during positioning and the flared stent strut may have caught at the guide catheter/introducer sheath.A small cut-down was performed, but the stent was unable to be located in the groin.A ct scan was performed which found the stent in tissue, above the vasculature.The patient was sent for a surgical cut-down to remove the dislodged stent.No additional information was provided.
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