Covered stent
First Claim
Patent Images
1. A composite intraluminal device comprising:
- an elongate radially expandable tubular stent having an interior luminal surface and an opposed exterior surface extending along a longitudinal stent axis; and
a stent cover positioned about the stent and which is formed of unsintered ePTFE which is expandable upon said radial expansion of said stent,wherein said stent covering includes an elongate segment of said unsintered ePTFE having an original longitudinal expanse, said segmnent being expanded in a transverse direction so as to reduce said original longitudinal expanse, said segment being positioned generally transverse to said longitudinal stent axis, and being expandable longitudinally upon said radial expansion of said stent to return said expanded segment to said original longitudinal expanse to thereby control said radial expansion of said stent.
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Accused Products
Abstract
A composite intraluminal device is deployable within a body vessel. The composite device includes an elongate radially expandable tubular stent having an interior luminal surface and an opposed exterior surface extending along a longitudinal stent axis. A stent cover is formed of unsintered ePTFE which is expandable. The stent cover is positioned about the stent so as to permit expansion of the cover upon the radial expansion of the stent.
309 Citations
14 Claims
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1. A composite intraluminal device comprising:
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an elongate radially expandable tubular stent having an interior luminal surface and an opposed exterior surface extending along a longitudinal stent axis; and a stent cover positioned about the stent and which is formed of unsintered ePTFE which is expandable upon said radial expansion of said stent, wherein said stent covering includes an elongate segment of said unsintered ePTFE having an original longitudinal expanse, said segmnent being expanded in a transverse direction so as to reduce said original longitudinal expanse, said segment being positioned generally transverse to said longitudinal stent axis, and being expandable longitudinally upon said radial expansion of said stent to return said expanded segment to said original longitudinal expanse to thereby control said radial expansion of said stent. - View Dependent Claims (2, 3, 4)
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5. A method of forming an intraluminal device comprising the steps of:
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providing an elongate radially expandable tubular stent; forming a stent cover from a longitudinal segment of unsintered EPTFE having a first longitudinal expanse and a transverse expanse, expanding said segment along said transverse expanse to provide a second transverse expanse greater than said first transverse expanse and a second longitudinal expanse less than said first longitudinal expanse; and applying said expanded segment about said stent, with said second transverse expanse extending longitudinally along said elongate stent. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. An intraluminal stent assembly comprising:
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a radially expandable stent having a longitudinal stent axis; a stent cover positioned about said stent and being formed of a generally uniaxially oriented polymer, said stent cover being oriented in a first direction and expanded in a second direction transverse to said first so as to decrease the length of said stent cover from its original length, said longitudinal axis of said stent being aligned with said second direction, so that said stent cover is expandable in said first direction to its original length upon said radial expansion of said stent to control said radial expanse of said stent. - View Dependent Claims (13, 14)
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Specification