It was reported that during an rfr [relative flow reserve] guided angioplasty, difficulty accessing the coronary artery with the pressurewire x wireless device was noted because the guide catheter did not provide enough support.The guide catheter was exchanged and when passing the pressurewire x wireless device, the polymer coating had come loose / unstable leaving the guide core exposed from the middle to proximal end.A new pressurewire x wireless device was used to complete the procedure.There was no adverse patient effect and no reported clinically significant delay in the procedure.No additional information was provided.
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Visual inspection was performed on the returned device.The reported event of failure to advance could not be replicated in a testing environment as it was based on operational circumstances.Meanwhile, the reported delaminated/peeled material could not be confirmed.However, a fracture was noted at the coated proximal tube region.The corewire was pulled out (separated) from the proximal tube but it was still intact which can result in the reported exposed guidewire core.Multiple kinks were also noted.It was likely that challenging anatomy, the interaction between the guidewire with other devices, or excessive manipulation/navigation in narrow vessel/stenosis caused damage to the guidewire resulting in material separation.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 indication of a lot specific product quality issue.The investigation determined that the reported peeled material and failure to advance were likely related to the material separation at the proximal tube, and the reported issue was likely related to the circumstances of the procedure.It was likely the challenging anatomy, the interaction between the guidewire with other devices, or excessive manipulation/navigation in narrow vessel/stenosis caused damage to the guidewire resulting in material separation and difficulty to advance.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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