It was reported that the procedure was treating a moderately calcified lesion in the proximal right coronary artery.During post-dilatation, the 4.5x8mm nc trek balloon dilatation catheter (bdc) was inflated to 22 atmospheres.The balloon was deflated; however, was noted to have a bad re-fold and experienced resistance retracting into the 6f guiding catheter.The balloon was inflated again slightly and then deflated in an attempt to obtain a better re-fold, but the balloon still had a bad re-fold.The balloon was able to be retracted about 80% into the guiding catheter.Due to the resistance with the guiding catheter during retraction, the guiding catheter, balloon, and guide wire were all removed together as a single unit.Post-dilatation was confirmed to be successful and nothing further needed to be done.There were no adverse patient effects and no clinically significant delay in the procedure.No additional information was provided.
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(b)(4): above rated burst pressure (rbp).Evaluation summary: the device was returned for evaluation.The reported difficulty and poor refold was not confirmed; however it may have been due to the circumstances of the procedure.Based on visual, dimensional and functional analysis of the returned device, there is no indication of a product deficiency.A review of the lot history record revealed no non-conformances that would have contributed to this complaint.A query of the electronic complaint handling database revealed no other incidents for difficult to remove from the guiding catheter, improper method, or poor refold reported from this lot.Based on the information reviewed, there is no indication of a product deficiency.It should be noted that the instructions for use (ifu) states that the balloon pressure should not exceed the rbp.It is unknown if the reported ifu deviation directly caused or contributed to the reported complaint.
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