(b)(4).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 other similar incidents from this lot.The investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely that inadvertent mishandling and/or applied force resulted in the reported shaft kink thus resulting in the reported inflation issue as the device was attempted to be inflated.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 performed to treat a 75% stenosed, eccentric lesion with no tortuosity and no calcification in the left main coronary artery.A xience alpine was implanted at the lesion.For post-dilatation, the 4.0 x 12 mm nc trek balloon catheter was advanced and crossed the lesion without resistance.However, the shaft became kinked and the balloon could not inflate.The nc trek was changed to a non-abbott balloon catheter to complete the procedure.Reportedly, the physician commented that device handling was as usual, but extra force might have been applied to the nc trek during advancement to the lesion.There was no adverse patient effect and no clinically significant delay in the procedure.No additional information was provided.
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