CPC A61F 2/07 (2013.01) [A61F 2002/072 (2013.01); A61F 2220/0041 (2013.01); A61F 2230/0019 (2013.01); A61F 2250/0037 (2013.01)] | 10 Claims |
1. A stent-graft comprising: a stent body, an inner cover membrane disposed on an inner side of the stent body, and an outer cover membrane disposed on an outer side of the stent body, wherein the stent body comprises a plurality of wave rings arranged axially at intervals, with alternatively arranged crests and troughs formed on the wave rings, wherein the outer cover membrane is provided with at least one first opening located adjacent a proximal end of the stent body that has a varying height, and the first opening exposes a plurality of troughs;
wherein the first opening is formed by cutting the outer cover membrane along an oblique line such that the height of the first opening gradually increases circumferentially across the stent body from a first side which has no height to a second side which has the greatest height, the first opening exposing at least one trough of the plurality of troughs located at or nearer to the second side, and the troughs located at the first side are all covered by the outer cover membrane;
wherein at least one second opening is further provided on the outer cover membrane, the second opening is nearer to a distal end of the stent body, the second opening is a circumferentially extending annular opening, and the second opening exposes all the crests on the same wave ring; and
wherein the stent-graft further comprises a plurality of reinforcement wires arranged axially at intervals in the axial direction of the stent graft length, each of the reinforcement wires being circumferentially wound around the stent body, and the reinforcement wires being positioned to avoid the first opening and the second opening;
characterized in that the reinforcement wires be maintained at a distance of 2 mm to 3 mm from the edge of the first opening, and the reinforcement wires be maintained at a distance of 2 mm to 3 mm from the edge of the second opening.
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