(b)(4).The device was not returned for analysis.The investigation determined the reported physical resistance appears to be related to circumstances of the procedure as it is likely that as the sds was advanced resistance was met with the heavily tortuous, moderately calcified anatomy resulting in the reported physical resistance.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.A conclusive cause for the reported patient effect, and the relationship to the product, if any, cannot be determined.However, dissection is listed in the xience prime everolimus eluting coronary stent systems instructions for use as a known patient effect of coronary stenting procedures.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 procedure was to treat a de novo lesion in the heavily tortuous, moderately calcified, distal posterior descending coronary artery.A 2.5 x 18 mm xience prime stent delivery system (sds) was advanced to the lesion with resistance felt, and crossed.The stent was successfully deployed at a pressure of 10 atmospheres and a 2.5 x 12 mm nc trek balloon dilatation catheter (bdc) was used for post-dilatation and was inflated to a pressure of 18 atmospheres.After post-dilatation a distal edge dissection was observed.In order to cover the dissection, another 2.5 x 18 mm xience prime stent was successfully implanted.There was no reported clinically significant delay in the procedure.No additional information was provided.
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