Covered endoluminal stent and method of assembly
First Claim
1. A radially expandable stent-graft assembly, comprising:
- a tubular radially expandable stent; and
a tubular graft member having radial recoil properties, wherein said graft member is circumferentially disposed about at least a portion of a longitudinal length of said stent, is radially expandable with said stent, and is retained thereupon by inherent recoil pressure in the range of about 10% to about 30%, exerted by the tubular graft member about the tubular radially expandable stent.
2 Assignments
0 Petitions
Accused Products
Abstract
A radially expandable endoluminal covered stent assembly and a method and apparatus for making the same. A longitudinally and radially expanded polytetrafluoroethylene tubular graft is circumferentially engaged about one or more radially expandable stents and is retained thereon by a radial recoil force exerted by the tubular graft against the stent. The graft is retained on the stent or stents prior to and during endoluminal delivery and radial expansion without the use of adhesives, sutures or other attachment means. Further, upon radial expansion the stent or stents do not require retaining means for preventing contraction, despite the inherent recoil imparted by the tubular graft. The covered stent is assembled by joining a dilation mandrel and a stent mandrel, placing the graft on the dilation mandrel where it is radially expanded, and passing the expanded graft over the stent that is positioned on the stent mandrel.
-
Citations
15 Claims
-
1. A radially expandable stent-graft assembly, comprising:
-
a tubular radially expandable stent; and
a tubular graft member having radial recoil properties, wherein said graft member is circumferentially disposed about at least a portion of a longitudinal length of said stent, is radially expandable with said stent, and is retained thereupon by inherent recoil pressure in the range of about 10% to about 30%, exerted by the tubular graft member about the tubular radially expandable stent. - View Dependent Claims (2, 3, 4, 15)
-
-
5. A radially expandable covered stent, comprising:
-
a tubular radially expandable stent having luminal and abluminal wall surfaces; and
a tubular graft member having luminal and abluminal wall surfaces and having elastic recoil properties, wherein the luminal wall surface of the graft member circumferentially covers at least a substantial longitudinal aspect of the tubular radially expandable stent and the radial recoil properties of the graft member enable the luminal wall surface of the graft member to exert pressure on the abluminal wall surface of the stent wherein the graft member is adapted to be retained on at least a substantial longitudinal aspect of the tubular radially expandable stent without further retaining means used therewith. - View Dependent Claims (6, 7, 8)
-
-
9. An expandable endovascular stent-graft, comprising:
-
a plurality of radially expandable endovascular stents, each having an interior and an exterior surface, wherein each of said stents is conformed to maintain an expanded diameter upon dilation without the use of retaining means; and
a radially expandable endovascular graft having a first end, a second end, an interior surface and an exterior surface wherein the interior surface of the vascular graft is friction fit about at least a portion of the exterior surface of each of said expandable stents. - View Dependent Claims (10, 11, 12, 13)
-
-
14. An expandable endovascular stent-graft, comprising:
-
at least three radially expandable endovascular stent members, each having an interior and an exterior surface wherein a first radially expandable endovascular stent member and a second radially expandable endovascular stent member are positioned and retained within a first end and a second end of a radially expandable endovascular graft and a at least a third radially expandable endovascular stent member is entirely covered by and retained within the radially expandable endovascular graft and positioned intermediate between the first and second stent members along a longitudinal axis of the radially expandable endovascular graft; and
the radially expandable endovascular graft further comprising an interior surface and an exterior surface wherein the interior surface of the radially expandable endovascular graft is friction fit about at least a portion of the exterior surface of each of said radially expandable stent members prior to any expansion of the expandable stent-graft.
-
Specification