(b)(4).The device was not returned for analysis.A review of the lot history record revealed no manufacturing nonconformities that would have contributed to this complaint.Additionally, a review of the complaint history of the reported lot revealed no other incidents.It is likely that the narrowed portion of the stent was due to the lesion site which was described as a heavily calcified, 100% stenosed total occlusion, and when the thumb slide was retracted during deployment, the tip was unable to pass through the narrowed stent causing it to detach.The investigation determined that the reported difficulties were due to circumstances of the procedure.There is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.
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It was reported that the procedure was to treat a de novo, mildly tortuous, heavy calcified, 100% stenosed total occlusion in the mid superficial femoral artery (sfa) through a 6f sheath via an ipsilateral antegrade approach.The vessel diameter was 5.5 mm.Pre-dilatation was performed with a 5x200 mm non-abbott balloon dilatation catheter at 16 atmosphere prior to advancing a 5 x 200 mm supera self-expanding stent system (sess) into the patient anatomy.During deployment of the supera stent it was noted that the catheter tip of the sess got stuck in the stent struts and broke off.After deployment, it was noted that there was a narrowed segment of the stent, which was thought to be from the detached tip.Post-dilatation was performed and the stent was confirmed to be well apposed to the vessel wall.The separated tip was retrieved using a snare device.There was no reported adverse patient sequela or a clinically significantly delay in the procedure.No additional information was provided.
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