It was reported that the procedure was to treat a heavily calcified, 60% stenosed lesion in the popliteal artery.A 6x80mm supera self-expanding stent system (sess) was advanced to the target lesion without issue.Deployment was initiated but the stent did not fully deploy and remained partially in the sheath.During removal of the delivery system with the stent attached, the stent released from the system and became free-floating in the popliteal artery.A snare was used to capture the stent and was removed without further issue.The patient remained in good condition and the procedure was aborted without using another stent or device.There was no adverse patient effect and no clinically significant delay in the procedure.No additional information was provided.
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The device was not returned for evaluation.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 complaints reported from this lot.The reported patient effect of embolization is listed in the supera instructions for use (ifu) as a known potential patient effect associated with use of the device.Based on the information provided, a conclusive cause for the reported difficulties resulting in stent embolization and unexpected medical intervention could not be determined.It may be possible that the distal sheath portion of the supera delivery system was bent or angled in the anatomy such that the ratchet was unable to properly engage the stent for full deployment.Additionally, if the stent was partially deployed, it is possible that during withdrawal of the delivery system, the stent released from the sheath causing the stent to became free-floating in the popliteal artery; 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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