Fork-type covered stent
First Claim
1. A bifurcated stent graft, comprising:
- a body;
a side branch that forms an acute angle with the body, the side branch comprising a covering film and a first bare stent disposed only on the covering film, with a part of the first bare stent positioned adjacent a boundary line of the body and the covering film, and is located in a vertex angle area of the acute angle; and
wherein the first bare stent comprises at least one metal ring that defines different waveforms that include struts and a plurality of proximal vertices and a plurality of distal vertices, each strut having a proximal vertex and a distal vertex at opposite ends thereof, with an axial distance defined for the strut between each connecting proximal vertex and distal vertex, and wherein the axial distances are different along the at least one metal ring, with the strut closest to the acute angle having the shortest axial distance, and the strut furthest from the acute angle having the longest axial distance.
1 Assignment
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Accused Products
Abstract
A bifurcated stem graft (10) comprises a body (100) and a side branch (200) that forms an acute angle with the body (100). The side branch (200) comprises a covering film (220) and a first bare stent (240) only disposed on the covering film (220). Part of the first bare stent (240) is positioned adjacent a boundary line (230) of the body (100) and the covering film (220) and is located in a vertex angle area (250) of the acute angle. Due to the fact that part of the first bare stem (240) is attached to the vertex angle area (250), after the stem (10) is released, the self-expanded part of the first bare stent (240) enables the vertex angle area (250) of the side branch (200) to be effectively supported, the covering film is not prone to shrinkage, and a leading wire can enter easily. Meanwhile, a special bare stent attached to the vertex angle area (250) does not need to be additionally disposed on the first bare stent (240), and thus the technology for preparing the bare stem is simplified; furthermore, the first bare stent (240) is only disposed on the side branch (200) and does not need to span the connecting part of the body (100) and the side branch (200), and thus the waveform can be shaped easily.
61 Citations
19 Claims
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1. A bifurcated stent graft, comprising:
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a body; a side branch that forms an acute angle with the body, the side branch comprising a covering film and a first bare stent disposed only on the covering film, with a part of the first bare stent positioned adjacent a boundary line of the body and the covering film, and is located in a vertex angle area of the acute angle; and wherein the first bare stent comprises at least one metal ring that defines different waveforms that include struts and a plurality of proximal vertices and a plurality of distal vertices, each strut having a proximal vertex and a distal vertex at opposite ends thereof, with an axial distance defined for the strut between each connecting proximal vertex and distal vertex, and wherein the axial distances are different along the at least one metal ring, with the strut closest to the acute angle having the shortest axial distance, and the strut furthest from the acute angle having the longest axial distance. - View Dependent Claims (2, 3, 4, 5)
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6. A bifurcated stent graft, comprising:
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a body; a side branch that forms an acute angle with the body, the side branch comprising a covering film and a first bare stent disposed only on the covering film, with a part of the first bare stent positioned adjacent a boundary line of the body and the covering film, and is located in a vertex angle area of the acute angle; and wherein the first bare stent comprises at least one metal ring that defines different waveforms that include struts and a plurality of proximal vertices and a plurality of distal vertices, each strut having a proximal vertex and a distal vertex at opposite ends thereof, with an axial distance defined for the strut between each connecting proximal vertex and distal vertex, and wherein the axial distances are different along the at least one metal ring, with the strut closest to the acute angle having the shortest axial distance; wherein the body comprises a second bare stent positioned adjacent the boundary line, with the second bare stent comprising two end support bars disposed at the opposite sides of the side branch, and the two end support bars are parallel to each other or symmetrical relative to the side branch. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A bifurcated stent graft, comprising:
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a body; a side branch that forms an acute angle with the body, the side branch comprising a covering film and a first bare stent disposed only on the covering film, with a part of the first bare stent positioned adjacent a boundary line of the body and the covering film, and is located in a vertex angle area of the acute angle; and wherein the first bare stent comprises at least one metal ring that defines different waveforms that include struts and a plurality of proximal vertices and a plurality of distal vertices, each strut having a proximal vertex and a distal vertex at opposite ends thereof, with an axial distance defined for the strut between each connecting proximal vertex and distal vertex, and wherein the axial distances are different along the at least one metal ring, with the strut closest to the acute angle having the shortest axial distance; wherein the body comprises a second bare stent positioned adjacent the boundary line and having an axial direction, with the second bare stent comprising two end support bars disposed at the opposite sides of the side branch, and the two end support bars are not parallel to the axial direction of the second bare stent. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification