(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 incidents reported from this lot.It should be noted the nc trek rx coronary dilatation catheter instructions for use states: balloon pressure should not exceed the rated burst pressure (rbp).Use of a pressure-monitoring device is recommended to prevent overpressurization.Based on the information reviewed, there is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.The investigation was unable to determine a conclusive cause for the reported balloon refold issue; however, the difficulty removing the device appears to be related to circumstances of the procedure.
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It was reported that this was a de novo lesion located in the proximal left anterior descending coronary artery.Pre-dilatation was performed with a non-abbott balloon dilatation catheter (bdc) and a non-abbott stent was placed.Post-dilatation was performed with the 4.0 x 20 mm nc trek balloon catheter.The nc trek balloon was inflated to 20 atmospheres, for 20 seconds.After fully deflating the balloon, it was observed that the balloon had not re-wrapped properly.There was reported resistance during removal with the guiding catheter.There was no reported adverse patient effect.There was no reported clinically significant delay in the procedure.No additional information was provided.
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