(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Evaluation summary: visual inspection was performed on the returned device.The reported balloon rupture and separation was confirmed.The resistance and difficulty removing was not tested as it was related to case circumstances.The investigation determined that the reported difficulties and subsequent treatments were due to case circumstances.It is likely that the reported resistance and balloon rupture were due to interaction with the anatomy causing damage to the outer surface of the balloon.The difficulty removing and separation likely occurred due to the ruptured balloon material becoming entrapped within the significant angulation of the arteriovenous fistula during removal.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.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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It was reported that the procedure was performed to treat stenosis at an arteriovenous fistula on an anastomosis with a significant angulation.The 3.0x100mm armada 18 otw percutaneous transluminal angioplasty catheter was advanced to the lesion with resistance with the anatomy, and the balloon ruptured during the first inflation at 4 bar.There was resistance noted with the anatomy during withdrawal, and force was applied.The balloon separated in two pieces during withdrawal from the arteriovenous fistula, and the balloon remained on the guide wire.A small incision was made around the introducer, and small forceps were used to extract the balloon from the patient anatomy, which extended the procedure time.The procedure concluded after the balloon was retrieved.There was no adverse patient sequela and no reported clinically significant delay in the procedure.No additional information was provided.
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