| 主权项 |
1. An endograft for a vessel, said endograft comprising:
a main body having a wall, the wall defining an internal surface and an exterior surface, where said main body is adapted to be placed within the vessel, the wall defining a single lumen at a proximal end and a distal end, and a set of four main body apertures extending from the interior surface to the exterior surface above the distal end that each correspond to a separate vascular branch; at least one expandable stent secured to the distal end; a set of four tunnels, where each of the four tunnels have a circumference, a length extending between a mouth and a terminus and sealed to the interior surface of said main body about the main body aperture, each of said four tunnels secured to the internal surface to provide fluid communication between the interior surface and the exterior surface through the four main body apertures that align with each of the separate vascular branches in proximity to each of the four main body apertures and where said four tunnels do not extend beyond the dimensions of the main body; a sleeve positioned partly within each of said four tunnels and partly within each of the corresponding vascular branches and beyond the wall; a first stent secured about the circumference of said main body above said four tunnels; and a second stent secured about the circumference of said main body below said four tunnels. |
