Low profile delivery system for stent and graft deployment and method for deployment
First Claim
1. A low-profile system for delivering and deploying a prosthesis comprising a graft and an underlying stent that are attached to one another only at or near a distal end of the prosthesis, the system comprising:
- the prosthesis;
a sheath positioned between the stent and the graft proximally of the distal end; and
at least one non-sheath means for retaining the graft against the sheath at least at or near a proximal end of the prosthesis during delivery of the prosthesis and for releasing prior to or during deployment of the prosthesis.
2 Assignments
0 Petitions
Accused Products
Abstract
A delivery system for endoluminal deployment of a stent inside of a biocompatible graft cover minimizes obstruction of endoluminal fluid flow during deployment. The delivery system comprises a stent sheath, a compressed stent underlying the stent sheath, and a graft overlying the stent sheath and releasably retained in a compressed state surrounding the sheath. The graft distal end is attached to the stent at or proximal the stent distal end, and the graft outer surface is exposed to the interior space of the lumen during deployment. The proximal end of the graft may be attached to the stent sheath by a releasable attachment adapted for release during deployment of the stent, or may be otherwise constrained, such as by heat deformation, to remain adjacent the outer circumference of the stent prior to deployment. The releasable attachment may be a suture that is severed by a pusher having a cutter therein. The delivery system may further include an inner core underlying the stent and connected to a tip sheath that overlies the stent distal end. One method of deploying the stent and overlying graft comprises advancing the tip sheath to allow the stent distal end to expand, retracting the stent sheath to cause the suture to be severed by the pusher cutter therefore allowing endoluminal fluid to flow between the graft and the sheath, and then completing deployment of the stent to urge the graft against the lumen wall.
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Citations
25 Claims
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1. A low-profile system for delivering and deploying a prosthesis comprising a graft and an underlying stent that are attached to one another only at or near a distal end of the prosthesis, the system comprising:
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the prosthesis;
a sheath positioned between the stent and the graft proximally of the distal end; and
at least one non-sheath means for retaining the graft against the sheath at least at or near a proximal end of the prosthesis during delivery of the prosthesis and for releasing prior to or during deployment of the prosthesis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A low-profile system for delivering and deploying a prosthesis comprising a graft and an underlying stent that are attached to one another only at or near a distal end of the prosthesis, the system comprising:
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the prosthesis;
a sheath positioned between the stent and the graft proximally of the distal end; and
a temporary protective wrapper for retaining the graft against the sheath and for removing prior to introduction of the prosthesis into a body lumen. - View Dependent Claims (10, 11)
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12. A method for deploying a prosthesis comprising a graft and an underlying stent that are attached to one another only at or near a distal end of the prosthesis, the method comprising:
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a) loading the prosthesis into a delivery system comprising the prosthesis;
a sheath positioned between the stent and the graft proximally of the distal end; and
at least one non-sheath means for retaining the graft against the sheath at least at or near a proximal end of the prosthesis;
b) delivering the prosthesis to a desired deployment location in the body lumen;
c) deploying the prosthesis in the desired deployment location. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification