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 interaction with the heavily calcified, moderately tortuous and 99% stenosed anatomy resulted in the ratchet being unable to fully release the stent from the delivery system; thus resulting in reported activation failure/deployment failure.During removal interaction between the sheath and the partially deployed stent resulted in the reported stretched stent and ultimately resulted in the reported stent migration as the elongated stent was noted to remain partially in the cfa and partially in the external iliac artery.As reported, the procedure was concluded without further treatment and no intervention required.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 a heavily calcified, moderately tortuous, 99% stenosed lesion in the left common femoral artery (cfa).A 5.5x150mm supera self-expanding stent system (sess) was advanced to the target lesion and the stent deployed.Under fluoroscopy, it was thought that the stent was completely out of the sheath of the device; however, during removal of the sess, the stent became elongated and was pulled into the external iliac artery.After the delivery system finally released the stent, the elongated stent was noted to remain partially in the cfa and partially in the external iliac artery, but well apposed to the vessel wall.The delivery system was successfully removed from the anatomy and the procedure was concluded without further treatment.No additional intervention was required.There was no adverse patient effect and no clinically significant delay in the procedure.No additional information was provided.
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