It was reported the procedure was performed to treat the left anterior descending artery with moderate calcification and tortuosity.The pressurewire x, wireless device was advanced and resistance was met with the introducer sheath.The physician proceeded with advancement as the resistance ceased but was unable to make the turn out of the left main into the left anterior descending artery.The device was therefore removed and replaced.At the end of the procedure, the introducer sheath was flushed, and green material (assumed to be teflon) was noted to be coming out of the introducer sheath.It is unknown if the green material came off while the pressurewire x was in the anatomy.There was no clinically significant delay in the procedure.No additional information was provided.
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Visual analysis was performed on the returned device.The reported difficulty/failure to advance was not tested as it was based on procedural circumstances.There was no peeling of the coating observed; however, the teflon was noted to be scraped in multiple locations.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 revealed no indication of a lot specific product quality issue.The investigation determined that the reported difficulty advancing, failure to cross and scraped teflon resulting in potential foreign body in patient was related to circumstances of the procedure.Based on the reported information resistance was met with the introducer sheath and continued attempt to advance against resistance was unsuccessful.It is likely that the introducer sheath was kinked or bent in the anatomy preventing advancement.Additionally, while attempting to advance against resistance, it likely that damage/scrapes to the pressurewire teflon coating occurred.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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