It was reported that the procedure was to treat a chronic totally occluded lesion in the distal right coronary artery (rca).A non-abbott non-compliant (nc) balloon was used to post-dilate an implanted stent at the bifurcation area and a 2.0x15mm mini trek balloon dilatation catheter (bdc) was used to be used to open up the side branch.There was reported resistance during advancement of the bdc with the guide catheter and the anatomy.After inflation at the ostium, twice at nominal pressure, the mini trek bdc was kept in position to re-insert the nc balloon for kissing balloon technique to complete the procedure.During advancement of the nc balloon resistance was met with the guiding catheter and a mixture of blood and contrast was noted in the indeflator.It was suspected that the mini trek balloon had ruptured.During the attempt to remove the mini trek bdc resistance with the guiding catheter was felt.The shaft broke during removal and became stuck inside the rca.Angiography was performed at the edge of the guiding catheter.The nc balloon was re-advanced to trap the separated shaft, but the balloon ruptured.A new nc balloon was inserted and the mini trek bdc was removed by trapping it inside the guiding catheter and snaring it out.All part of the mini trek bdc were successfully removed.There was no clinically significant delay in the procedure and no adverse patient sequela.No additional information was provided.
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(b)(4).Evaluation summary: visual, dimensional and functional inspections were performed on the returned device.The reported separation was confirmed.The reported balloon rupture was not confirmed; however, a tear was identified in the guide wire notch and is likely what was perceived as the rupture by the account.The reported physical resistance and difficulty positioning and removing the device from the guiding catheter could not be replicated in a testing environment as it was based on operational circumstances.It should be noted coronary dilatation catheters, mini trek rx, global, instruction for use, states: if resistance is felt, determine the cause before proceeding.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 of the reported lot did not indicate a lot specific quality issue.The investigation determined the reported balloon rupture, physical resistance, difficulty positioning and removing the device from the guiding catheter, patient effect and additional treatment appear to be related to circumstances of the procedure.The reported shaft separation appears to be related to user error/circumstances of the procedure.There is no indication of a product quality issue with respects to the design, manufacture, or labeling of the device.
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