(b)(4).There was no reported device malfunction and the product was not returned.The reported patient effect of intimal dissection is listed in the coronary dilatation catheters, trek rx global, instructions for use as a known patient effect.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Based on the information reviewed, there is no indication of a product quality issue.Based on the case information and related record review, a conclusive cause for the reported patient effects, and the relationship to the product, if any, cannot be determined and the treatment appears to be related to operational circumstances.
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It was reported that the procedure was to treat a lesion located in the heavily calcified right coronary artery (rca).The patient presented experiencing a st elevation myocardial infarction.Pre-dilatation was performed on the lesion with a 3.0 x 12 mm trek balloon catheter.Despite pre-dilatation being performed the implant delivery system could not be advanced into the target lesion.The delivery system was retracted from the anatomy without issue and a 3.5 x 15 mm trek was advanced for additional pre-dilatation and inflated three times (2 times at 18 atmospheres (atm) and 1 time at 20 atm.) during pre-dilatation a dissection was observed.The dissection was treated at the same time as the lesion with three xience prox stents with a good result; however, after deployment a small dissection confirmed to be caused by the trek balloon, was observed in one of the small side branches of the rca which was not treated.On 4/13/2016 the side branch was reassessed and was fine; therefore, no treatment was performed.The patient is reported to be well.No additional information was provided.
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