Visual analysis was performed on the returned device.The reported difficulty to remove was not co nfirmed as it was based on procedural circumstances.Furthermore, the reported material splitwas not confirmed during visual analysis.Visual analysis noted that the distal tip core was bent 4mm proximal to the distal end.The distal tip coils were stretched distal to the sensor jacket for a length of 3mm.The distal tube was kinked 8mm proximal to the sensor jacket.The micro cables were bent at the noted kinked distal tube.There were bends throughout the proximal wire core.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 similar complaints reported from this lot.Based on the information received and analysis of the returned device, the investigation was unable to determine a cause for the reported difficult to remove.It may be possible that, during the procedure, the pressurewire was inadvertently bent/kinked while attempting to advance through challenging anatomical morphology.Furthermore, it may be possible that the noted bend/kink on the pressurewire caused it to become inadvertently lodged in the narrow lesion resulting in the reported difficult to remove.However, this could not be confirmed.Although the pressurewire was returned stretched, bent and kinked in multiple areas, the reported separation was not confirmed.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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