Stent/graft assembly
A stent/graft assembly includes a tubular graft connected in substantially end-to-end relationship with a generally tubular stent. Free ends of the stent and graft extend in opposite directions from the end-to-end connection during a pre-deployment orientation of the assembly. However, the graft is inverted during deployment so that free ends of the graft and the stent extend in substantially the same direction from the end-to-end connection in a post-deployment orientation. Thus, at least a portion of the stent is disposed within at least a portion of the graft in a post-deployment orientation of the assembly.
1. An endovascular stent/graft assembly for repairing a section of a blood vessel that has an aneurysm, the blood vessel having first and second relatively healthy sections adjacent and on opposite ends of the aneurysm, the assembly comprising:
a substantially tubular stent having opposite first and second axial ends;
a graft having opposite first axial and second axial ends and a flexible wall portion therebetween, substantially all of the flexible wall portion between the first axial end and the second axial end being unsupported;
a discrete annular element attached at a location inside the graft and at a position substantially adjacent the first axial end of the graft; and
connecting members extending from circumferentially spaced apart locations on the discrete annular element, the connecting members having curved portions projecting beyond the first axial end of the graft and connected to circumferentially spaced apart locations at the first axial end of the stent to maintain a substantially end-to-end axial connection between the stent and the graft, wherein
the substantially end-to-end axial connection comprises a gap between the stent and the graft that is less than a diameter of the stent, and the connecting members bridge the gap.
2. The endovascular stent/graft assembly of claim 1 , wherein the curved portions of the connecting members define hooks connected to the stent.
3. The endovascular stent/graft assembly of claim 1 , wherein the connecting members are incorporated into the graft.
4. The endovascular stent/graft assembly of claim 3 , wherein the connecting members are woven into the graft.
5. The endovascular stent/graft assembly of claim 1 , wherein the graft is a bifurcated graft.
6. The endovascular stent/graft assembly of claim 1 , wherein the graft is a corrugated graft.
7. The endovascular stent/graft assembly of claim 1 , wherein the connecting members comprise sutures.
8. The endovascular stent/graft assembly of claim 1 , wherein the connecting members provide one or more points of contact between the stent and the graft.
9. The endovascular stent/graft assembly of claim 1 , wherein the curved portions of the connecting members extend beyond the first axial end of the graft a distance that does not exceed a distance from the first axial end of the graft to an end of the discrete annular element that is farthest from the first axial end of the graft.
10. The endovascular stent/graft assembly of claim 1 , wherein the curved portions of the connecting members extend beyond the first axial end of the graft a distance that does not exceed a distance from the first axial end of the graft.