Modular stent graft employing bifurcated graft and leg locking stent elements
First Claim
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1. A modular stent graft for repairing an aneurysm in the human aorta, the stent graft comprising:
- a collapsible flexible bifurcated graft having a bifurcated hip section, a first pant leg section that extends from said bifurcated hip section to a first proximal end, and a second pant leg section that extends from said bifurcated hip section to a second proximal end;
at least one collapsible stent member including stent elements that surround and support the bifurcated graft, a first set of stent elements that are proximally disposed relative to and spaced apart from said first proximal end of said first pant leg section by at least one connector element, and a second set of stent elements that are proximally disposed relative to and spaced apart from said second proximal end of said second pant leg section by at least one connector element;
a collapsible flexible first leg graft that interconnects to said first pant leg section of said bifurcated graft, said first leg graft having an exterior surface;
a collapsible flexible second leg graft that interconnects to said second pant leg section of said bifurcated graft, said second leg graft having an exterior surface;
a third set of stent elements that are disposed external to and surrounding said exterior surface of said first leg graft at a position offset proximally from the distal end of said first leg graft, wherein said third set of stent elements are operably disposed between said first proximal end of said first pant leg section and said first set of stent elements to thereby maintain interconnection between said first leg graft and said first pant leg section of said bifurcated graft; and
a fourth set of stent elements that are disposed external to and surrounding said exterior surface of said second leg graft at a position offset proximally from the distal end of said second leg graft, wherein said fourth set of stent elements are operably disposed between said second proximal end of said second pant leg section and said second set of stent elements to thereby maintain interconnection between said second leg graft and said second pant leg section of said bifurcated graft.
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Abstract
A modular stent graft system and associated surgical methods are provided that incorporates an external stent-based locking mechanism to prevent disarticulation of the legs from the bifurcated graft as well as other features that overcome many of the difficulties of the prior art associated with delivering and securing the bifurcated grafts to the intended deployment site within the human aorta.
102 Citations
55 Claims
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1. A modular stent graft for repairing an aneurysm in the human aorta, the stent graft comprising:
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a collapsible flexible bifurcated graft having a bifurcated hip section, a first pant leg section that extends from said bifurcated hip section to a first proximal end, and a second pant leg section that extends from said bifurcated hip section to a second proximal end; at least one collapsible stent member including stent elements that surround and support the bifurcated graft, a first set of stent elements that are proximally disposed relative to and spaced apart from said first proximal end of said first pant leg section by at least one connector element, and a second set of stent elements that are proximally disposed relative to and spaced apart from said second proximal end of said second pant leg section by at least one connector element; a collapsible flexible first leg graft that interconnects to said first pant leg section of said bifurcated graft, said first leg graft having an exterior surface; a collapsible flexible second leg graft that interconnects to said second pant leg section of said bifurcated graft, said second leg graft having an exterior surface; a third set of stent elements that are disposed external to and surrounding said exterior surface of said first leg graft at a position offset proximally from the distal end of said first leg graft, wherein said third set of stent elements are operably disposed between said first proximal end of said first pant leg section and said first set of stent elements to thereby maintain interconnection between said first leg graft and said first pant leg section of said bifurcated graft; and a fourth set of stent elements that are disposed external to and surrounding said exterior surface of said second leg graft at a position offset proximally from the distal end of said second leg graft, wherein said fourth set of stent elements are operably disposed between said second proximal end of said second pant leg section and said second set of stent elements to thereby maintain interconnection between said second leg graft and said second pant leg section of said bifurcated graft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An intraluminal stent graft comprising:
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a collapsible flexible bifurcated graft having a bifurcated hip section, a first pant leg section that extends from said bifurcated hip section to a first proximal end, and a second pant leg section that extends from said bifurcated hip section to a second proximal end; a collapsible unitary first stent member including stent elements that surround and support said bifurcated graft, a first set of stent elements that are disposed distally from a distal end of said bifurcated graft for supporting said bifurcated graft in the aorta, a second set of stent elements that are proximally disposed relative to and spaced apart from said first proximal end of said first pant leg section by at least one connector element, and a third set of stent elements that are proximally disposed relative to and spaced apart from said second proximal end of said second pant leg section by at least one connector element; and a collapsible flexible first leg graft having a second stent member with a fourth set of stent elements coupled thereto; a collapsible flexible second leg graft having a third stent member with a fifth set of stent elements coupled thereto; wherein said fourth set of stent elements are disposed external to and surrounding an exterior surface of said first leg graft and are operably disposed proximal to said first proximal end of said first pant leg section and distally adjacent to said second set of stent elements in order to maintain interconnection between said first leg graft to said first pant leg section of said bifurcated graft; and wherein said fifth set of stent elements are disposed external to and surrounding an exterior surface of said second leg graft and are operably disposed proximal to said second proximal end of said second pant leg section and distally adjacent to said third set of stent elements in order to maintain interconnection between said second leg graft to said second pant leg section of said bifurcated graft. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A modular stent graft for repairing an aneurysm in the human aorta, the stent graft comprising:
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a collapsible flexible bifurcated graft having a pant leg section extending to a proximal end; at least one collapsible stent member including a first set of stent elements that surround and support the bifurcated graft and a second set of stent elements that are proximally disposed relative to and spaced apart from said proximal end of said pant leg section by at least one connector element; a collapsible flexible leg graft that interconnects to said pant leg section of said bifurcated graft, said leg graft having an exterior surface; a third set of stent elements that are disposed external to and surrounding said exterior surface of said leg graft at a position offset proximally from the distal end of said leg graft, wherein said third set of stent elements are operably disposed between said proximal end of said pant leg section and said second set of stent elements to thereby maintain interconnection between said leg graft and said pant leg section of said bifurcated graft. - View Dependent Claims (51, 52, 53, 54, 55)
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Specification