| 主权项 |
1. A method for sealing a stent graft in an endovascular aneurysm repair, the method comprising:
positioning and deploying the stent graft having a graft distal end in an aneurysmatic host vessel, such that the stent graft extends across an aneurysm; introducing a balloon catheter in said host vessel, said balloon catheter comprises a shaft, a balloon and an infusion lumen opened through a proximal infusion outlet at a periphery of said shaft proximally adjacent to said balloon; placing said balloon at a first location distal to said graft distal end; inflating said balloon to a first internal pressure configured for unconstrained balloon expansion characterized by a maximal balloon diameter being equal to or greater than smallest inner diameter of said host vessel at said first location, such that said inflated balloon occludes normal blood flowing proximally thereacross for fluid communication with said proximal infusion outlet; infusing contrast enhancing material through said infusion lumen and said proximal infusion outlet for allowing radiographic visualization of endoleakage between the stent graft and a wall of said host vessel; deflating and repositioning said balloon to a second location within a first selected section of the stent graft; and pressurizing said balloon to a second internal pressure configured for plastically expanding said first selected section from a smaller diameter to a fixed enlarged diameter. |
