Endovascular stent graft and fixation cuff
OwnerMichel Letortinventor
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Abstract
An endoluminal prosthesis is provided with an improved fixation system for coupling the endoluminal prosthesis to an inner wall of a lumen. According to an embodiment of the present invention, the functions of securing proximal fixation of the graft and delivering the main body of the prosthesis to bypass the diseased vessels are independently carried out using a modular device and modular steps for delivery and placement of the modular components. In particular a modular fixation device is provided for initial fixation to a lumen wall and a longer endoluminal prosthesis is provided for coupling to the fixation device, and bypassing a diseased portion of the anatomy. In one embodiment, the longer endoluminal prosthesis includes hook like members that engage loops on the modular fixation device.
Claims17
A modular endoluminal prosthesis comprising:
- a) a fixation member comprising a tubular member having an opening and including a coupling mechanism configured to couple the fixation member to the inner wall of a body lumen and to form a leak resistant seal therewith;
- b) an elongate prosthesis comprising:
- a tubular graft comprising a graft material forming a lumen for the flow of body fluid therethrough;
- at least one annular support member coupled to the graft material for supporting the graft material to provide a lumen for the flow of body fluid therethrough;
- and
- an engaging member configured to couple the elongate prosthesis to the fixation member,
- wherein a portion of the elongate prosthesis is configured to fit within the opening in the fixation member and to engage the fixation member to form a leak resistant seal therewith.
A cuff for fixing an endoluminal prosthesis to the inner wall of a body lumen, said cuff comprising:
- a tubular member having an opening and including a fixation mechanism configured to fixably engage the cuff to the inner wall of a body lumen and to form a leak resistant seal with the inner wall of the body lumen, wherein the opening in the tubular member is configured to receive an endoluminal prosthesis in a substantially sealing arrangement therewith;
- and
- a coupling member configured to engage a portion of the endoluminal prosthesis to couple the cuff to the endoluminal prosthesis.
A method for excluding a diseased portion of a body lumen from the flow of body fluid comprising the steps of:
- providing a tubular cuff having an opening therethrough;
- fixing the tubular cuff to the inner wall of the body lumen at a fixation site within a body lumen at a location upstream of the diseased portion;
- providing an endoluminal prosthesis comprising a tubular member having an proximal opening and a distal opening, said tubular member, proximal opening and distal opening forming a lumen for the flow of body fluid therethrough. Said endoluminal prosthesis comprising an engaging member configured to engage the tubular cuff;
- locating a portion of the endoluminal prosthesis within the tubular cuff;
- fixing the portion of the endoluminal prosthesis to the tubular cuff by coupling the endoluminal prosthesis to the cuff with the engaging member;
- and
- deploying the endoluminal prosthesis in the body lumen to bypass the diseased portion of the body lumen and to provide a lumen for the flow of body fluid therethrough.
A modular endoluminal prosthesis comprising:
- a) a modular fixation means for fixing a prosthesis above an aneurysm within a body lumen, the fixation means comprising a tubular means having an opening and including a coupling means for coupling the fixation means to the inner wall of a body lumen and for forming a leak resistant seal with the inner wall of the body lumen;
- and
- b) an elongate prosthesis means comprising:
- a tubular graft means for providing a lumen for the flow of body fluid therethrough;
- at least one annular support means coupled to the graft means, said support means for supporting the graft material to provide the lumen for the flow of body fluid therethrough,
- wherein a portion of the elongate prosthesis means is configured to fit within the opening in the fixation means and to engage the fixation means to form a leak resistant seal therewith.
Dependencies are inferred from the claim text.