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 identified no similar incidents from this lot.The reported patient effect of dissection is listed in the xience sierra everolimus eluting coronary stent systems instructions for use as a known patient effect of coronary stenting procedures.The investigation was unable to determine a conclusive cause for reported difficulty to remove; however, factors that may contribute to difficulty to remove include, but are not limited to, patient anatomical morphology, patient disease state, and deflation technique.The reported patient effect of dissection and additional therapy/non-surgical treatment appear to be related to operational context of the procedure.There is no indication of a product quality issue with respect to manufacture, design or labeling.The xience pro device is currently not commercially available in the us; however, it is similar to a device sold in the us.
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It was reported that the procedure was to treat a lesion located in the highly stenosed middle ramus interventricularis anterior (riva).After pre-dilatation, the stent delivery system (sds) was advanced through the stenosis without issue.The stent was them deployed at 14-15 atmospheres for about 30 seconds.After stent implantation, the sds could not be removed.Some troubleshooting was performed and the sds was successfully removed; however, a dissection was noted, so a second unplanned stent was implanted as treatment.There was no adverse patient sequela.No additional information was provided.
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