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Figure 1. Photographs of the covered stent(Taewoong Medical, Seoul, Korea) composed of a self-expanding nitinol wire covered with PTFE. (a) The 10 mm x 50 mm stent used secondarily in cases 1 and 2 consists of proximal and distal bare segments of 5 mm and a middle covered area of 40 mm. (b) Note the structural relationship of the stent wire and PTFE graft. Outer polyurethane layer connects the stent wire and PTFE graft. Stent wire thickness is 0.007'' in size.
