It was reported that the procedure was performed to treat a lesion in the transverse sinus with moderate tortuosity.A non-abbott 6f guide wire was used first but failed.Another non-abbott device was advanced through the guide sheath.The absolute pro self expanding stent system (sess) was advanced and resistance was noted with the anatomy.The angles around the lesion caused some resistance and pressure on the delivery system.The sheath was pulled back to expose the stent; however, the stent was partially deployed (approximately 20 mm) and the thumbwheel wouldn't move.At this point, the stent failed to deploy and the sess could not be removed.The handle was removed and surgical cut down was performed to retrieve device from the anatomy.There was a one hour delay in the procedure due to the need for surgery and the patient was hospitalized one additional day.No additional information was provided.
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The device was returned for analysis.The reported activation failure and the reported mechanical jam were unable to be replicated in a testing environment due to the condition of the returned device.The reported difficult to advance and the reported entrapment of device were unable to be replicated in a testing environment as they were based on operational circumstances.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.Reportedly, the device was used in the sinoatrial nodal artery.It should be noted that the absolute pro vascular self-expanding stent system instructions for use (ifu) states: the absolute pro vascular self-expanding stent system is indicated for improving luminal diameter in patients with de novo or restenotic atherosclerotic lesions in the native common iliac artery and native external iliac artery.It is undetermined if the deviation of the instructions for use caused/contributed to the reported difficulties.As there was no damage noted to the device during the inspection prior to use, the investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely that resistance was met with the moderate torturous anatomy resulting in the reported difficult to advance.Additionally, the moderate torturous anatomy/angles around the lesion resulted in the distal shaft to be bent preventing the shaft lumens from moving freely, resulting in resistance with the thumbwheel/ mechanical jam and difficulty deploying the stent/ activation failure.Interaction with the anatomy and/or other devices resulted in the reported entrapment of device.Manipulation of the device during attempted removal, in conjunction with removing/opening the handle, resulted in the multiple noted device damages.The treatments appears to be related to the operational context of the procedure as surgical cut down was performed to retrieve device from the anatomy.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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