The device was not returned for analysis.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 from this lot.The investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely that after successful stent deployment when removing the delivery system the tip inadvertently got caught on the deployed stent, thus resulting in the reported resistance noted at the introducer sheath during removal and ultimately resulting in the reported activation failure.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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It was reported that the procedure was to treat the superficial femoral artery with moderate calcification, moderate tortuosity and 80% stenosis.The lesion was pre-dilated with a 7 mm balloon for 3 minutes at nominal pressure and atherectomy was not performed.The 6.5x80 mm supera self expanding stent system (sess) was advanced to the correct placement of the lesion.The stent was deployed; however, when removing the delivery system, resistance was noted at the introducer sheath.During angiography it was found that the stent had been pulled back to the introducer sheath.The stent, delivery system and introducer sheath were removed together as one unit.Outside of the patient it was noted that the delivery system was stuck behind the stent and pulled everything out with it when it was removed.A new 6fr sheath was advanced over the guide wire and a 6.5x100 mm supera stent was deployed at the intended location without any issues.There were no adverse patient effects and there was no clinically significant delay in the procedure.No additional information was provided.
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