Intraluminal stent and graft
View Patent ↗An intraluminal stent and graft includes a stent made of a continuous helix of zig-zag wire and loops which connect adjacent apices of the wire. The stent is compressible and self-expandable substantially to a pre-compressed configuration. The device also includes a graft secured to the stent and made of a suitable biocompatible material.
1. A stent-graft combination comprising a tubular stent having a plurality of hoops aligned adjacent one another along the axis of said tubular stent, each of said hoops comprising a plurality of elongate elements, with pairs of said elongate elements meeting one another and forming vertices axially pointing in a direction along the axis of the stent, wherein at least some of said vertices axially abut and are individually connected to oppositely pointed vertices of elongate elements of an adjacent hoop by separate connecting members which connect adjacent vertices so that they abut one another, further including a tubular graft member disposed circumferentially adjacent the tubular stent and wherein at least one elongate element from one hoop is continuous with a second elongate element of an adjacent hoop.
2. A stent-graft combination according to claim 1 , wherein said stent is comprised of a shape memory material.
3. A stent-graft combination according to claim 2 , wherein said shape memory material is nitinol.
4. A stent-graft combination according to claim 1 , wherein said stent is comprised of an elastic material.
5. A stent-graft combination according to claim 4 , wherein said elastic material is stainless steel.
6. A stent-graft combination according to claim 1 , wherein said graft covers diamond shaped openings in said stent.
7. A stent-graft combination according to claim 1 , wherein said graft covers diamond shaped openings in said stent and is attached to said stent by ligature loops.
8. A stent-graft combination according to claim 7 , wherein said ligature loops also form connections between abutting apices of said stent.
9. A stent-graft combination according to claim 1 , wherein the graft is disposed on an outer surface of the stent.
10. A stent-graft combination according to claim 1 , wherein the graft is disposed on an inner surface of the stent.
11. A stent-graft according to claim 1 , wherein said graft member includes a drug substance disposed thereon.
12. A stent-graft according to claim 1 , wherein said graft comprises polyester or polytetrafluoroethylene.