(b)(4).Evaluation summary: the gap seen during preparation of the device could not be conclusively confirmed as the delivery system was returned partially deployed due to manipulation of the device by the physician.Once the stent graft was fully deployed and the external slider was recombined with the front grip, a 2-3mm gap between the tapered tip and graft cover was observed.The root cause of the event could not be conclusively determined; however, the manipulation of the delivery system by the physician may have contributed to the 2-3mm gap seen after stent graft deployment.
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A valiant stent graft system was selected for use in the patient for the endovascular treatment of a thoracic aortic lesion.It was reported that, during inspection and preparation, the physician discovered a gap between the tapered tip and the graft cover.There was no abnormality to the original packaging.Prior to use, the stent graft was prematurely deployed while the physician was attempting to close the gap.Per the physician, the cause of the event was due to a poor seal or gap between the tapered tip and the graft cover.The device was replaced with another valiant stent graft and the surgery was completed.No clinical sequelae were reported and the patient is fine.
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