A visual, dimensional, and functional inspections were performed on the returned sds.The reported stent dislodgement was confirmed.The reported difficulty to advance the sds over the guide wire was unable to be confirmed and a proxy guide wire was able to advance and retract without any resistance noted.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 reported from this lot.Factors that may contribute to the difficulty to advance/position the sds over the guide wire and cause resistance between the devices may include, but not limited to, manufacturing, device placement technique, guiding catheter support, anatomical conditions/patient anatomical morphology, inner diameter of guide wire lumen of sds device, outer diameter of the guide wire, condition of the guide wire, condition of the sds, coagulation of blood or procedural contaminates.Additionally, factors that can contribute to stent dislodgement may include, but not limited to; improper or inadequate crimping at the time of manufacture, incorrect sheath sizing, positive pressure during preparation, forced sheath removal, handling of the stent during preparation, and interaction with the lesion, accessory devices, and/or previously implanted stents.The investigation was unable to determine a conclusive cause for the reported difficulty to advance the sds over the guide wire and stent dislodgement.It is possible that the stent dislodgment occurred during removal of the protective sheath; 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.
|