(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.(b)(4).The device is expected to be returned for evaluation.It has not yet been received.A follow up report will be submitted with all additional relevant information.
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It was reported that the procedure was to treat a narrow and heavily calcified proximal left anterior descending artery (lad) that had in-stent restenosis of a non-abbott stent and a 95% stenosed circumflex (cx) artery.The restenosis in the lad was treated with a drug-eluting balloon catheter.The cx was pre-dilated with a 2.5 x 12 mm unspecified balloon catheter to 12 atmospheres.An unspecified 2.75 x 8 mm drug-eluting stent was deployed at 12 atmospheres.The stent delivery system was left in the anatomy and a 4.0 x 12 mm nc trek balloon catheter was being advanced for a kissing balloon technique when there was strong resistance felt.The catheter was pushed extremely hard when the proximal shaft, outside the anatomy, separated.The catheter was removed without issue and a new 4.0 x 12 mm nc trek was successfully used to complete the procedure.There was no clinically significant delay in procedure and no adverse patient effects.No additional information was provided.
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(b)(4).Evaluation summary: visual and dimensional inspection was performed on the returned device.The shaft separation was confirmed.The difficulty positioning the device could not be replicated in a testing environment as it was based on operational circumstances.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 from this lot.It should be noted coronary dilatation catheters (cdc), nc trek rx, global, instruction for use states: if resistance is felt, determine the cause before proceeding.Continuing to advance or retract the catheter while under resistance may result in damage to the vessels and / or damage / separation of the catheter.The investigation determined the reported difficulty positioning the device appears to be related to circumstances of the procedure; however, the reported shaft separation appears to be related to user error.There is no indication of a product quality issue with respects to the design, manufacture, or labeling of the device.
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