(b)(4).The device was received.Visual and functional analysis was performed on the returned device.The reported partial deployment, mechanical jam of the thumbslide, difficult to remove, stent elongation and malposition of the stent could not be confirmed or replicated due to the condition of the returned device, as the stent was already fully deployed.The tip separation as well as damage to the distal sheath were confirmed.The investigation determined that the reported difficulties were most likely related to case circumstances.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.A review of the complaint history identified no other complaints reported from this lot.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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It was reported that the chronic total occlusion (100% occluded) in the moderately calcified superficial femoral artery (sfa) was predilated with a 6.0x200 mm armada 18 balloon dilatation catheter at 8 atmospheres two or three times.The 6.0x150 mm supera stent was advanced to the sfa target lesion and stent deployment commenced.After approximately 4 cm of the supera stent was deployed, the thumbslide became stuck and was no longer able to be actuated.It was decided to remove the partially deployed stent.During removal of the stent delivery system, the tip of the self expanding stent system became detached and the thumbslide became unstuck.Approximately another 2 to 3 cm of the stent deployed and the sess could no longer be retracted into the 6 french sheath.It was decided to deploy the stent where it was in the unintended area across the iliac/aortic bifurcation.The stent was elongated by about 25% but it was ok.No additional information was provided.
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