The device was returned for analysis.The reported deployment issue and dislodgement was not confirmed as the stent had already been fully deployed and was not returned.In this case the difficulty to remove was not confirmed.The noted bends on the sheath were likely caused by case circumstances.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 other similar complaints.It should be noted that the supera instruction for use states: under fluoroscopy, remove the device from the guide wire and evaluate the improved luminal quality of the treated area.Failing to use fluoroscopy during removal does not appear to have contributed to the initial deployment difficulty.The investigation was unable to determine a cause for the reported difficulties.It may be possible that the distal sheath of the delivery system was entrapped or bent within the anatomy such that the ratchet was unable to properly engage stent during the final deployment stroke; 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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