It was reported that the procedure was performed in the moderately tortuous and heavily calcified lesion in the left anterior descending artery.The pressurewire x wireless was used for fraction flow reserve measurement.The device was calibrated and equalized.To change position, the device was advanced to the septal inside a stent strut, which was not intended.When the device was attempted to be pulled back, resistance was felt and it was difficult to remove.Although not confirmed, it was thought that the pressurewire x was probably entangled with the stent.After a while, it could be removed without resistance.The procedure was successfully completed without using a replacement device.There were no adverse patient effects and 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 to remove was not able to be confirmed as it was based on procedural circumstances.During the visual analysis, the distal core was noted to be bent at multiple locations and there were multiple kinks on the proximal 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 while attempting to advance through challenging anatomical morphology.Furthermore, it may be possible that the noted bend on the pressurewire caused it to become inadvertently caught on the stent.However, this could not be 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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