The device was not returned to abbott vascular 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.Based on the review of similar incidents there is no indication of a lot specific product quality issue.There was no damage noted to the stent delivery system (sds) during the inspection prior to use which suggests a product quality issue with respect to manufacture, design or labeling did not contribute to the reported difficulties.The investigation determined the reported difficulty to remove, stent dislodgement, embolism and treatments appear to be related to operational circumstances of the procedure.Based on the reported information, it is likely that during advancement the sds was inadvertently advanced through a previously implanted stent graft.During retraction, the sds encountered resistance with the implanted stent and the stent dislodged off the balloon but remained on the guide wire.Further manipulation of the sds caused the stent to come off the wire.The omnilink stent then embolized and an unsuccessful attempt was made to snare the stent.Ultimately a cut down procedure was performed to remove the stent.There is no indication of a product quality issue with respect to the design, manufacture.
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It was reported that the procedure was performed to treat a lesion in the left subclavian artery via brachial access.The patient anatomy included a previously implanted thoracic stent graft.The omnilink elite stent delivery system (sds) was advanced over the guide wire to the target lesion; however the sds was advanced past the target lesion and interacted with the stent graft.The omnilink sds was advanced through the stent graft struts and during removal of the omnilink sds, the stent dislodged from the delivery system, but remained on the guide wire.A snare was advanced to retrieve the dislodged stent.The physician was unable to snare the stent.During removal of the snare device, the physician inadvertently pulled the guide wire, which caused the stent to come off the guide wire.The omnilink stent then embolized to the descending aorta, where it became caught in the thoracic stent graft.The physician advanced a snare device, via groin access, and was able to snare the stent from below.The stent was then pulled to the left external iliac artery, but was unable to be pulled into the sheath.A cut down procedure was performed to remove the stent.A second omnilink elite sds was able to be advanced to the target lesion, and the stent was deployed without issue.A delay was reported due to the difficulty retrieving the stent; however, the patient remained in stable condition.No additional information was provided.
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