Selective adherence of stent-graft coverings
First Claim
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1. An endoluminal prosthesis, comprising:
- at least one radially expandable support member, having a plurality of openings passing through a wall thereof, a main portion with a first outer diameter, and at least one flared end portion with a second outer diameter greater than the first outer diameter;
a first covering member comprising a biocompatible material, positioned about an interior surface of said support member; and
a second covering member comprising a biocompatible material, positioned about an exterior surface of said support member;
wherein said first covering member is bonded to said second covering member along two or more spaced apart bonding regions positioned in said openings in said support member, such that a pocket is formed between adjacent bonding regions, the pocket being sized greater than a thickness of the support member wall to permit movement of the support member wall within the pocket.
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Abstract
An endoluminal vascular device having a plurality of predetermined boding locations between respective first and second covering members to selectively encapsulate a support member. Selective bonding between the first and second covering members results in unbonded slip pockets to accommodate movement of the support member. Such a configuration allows compression of the support member with minimal force and also promotes a low profile of the compressed device. Unbonded regions of the covering members also encourage enhanced cellular penetration for rapid healing and can be configured to hold bioactive substances that diffuse through the covering members.
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Citations
20 Claims
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1. An endoluminal prosthesis, comprising:
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at least one radially expandable support member, having a plurality of openings passing through a wall thereof, a main portion with a first outer diameter, and at least one flared end portion with a second outer diameter greater than the first outer diameter; a first covering member comprising a biocompatible material, positioned about an interior surface of said support member; and a second covering member comprising a biocompatible material, positioned about an exterior surface of said support member; wherein said first covering member is bonded to said second covering member along two or more spaced apart bonding regions positioned in said openings in said support member, such that a pocket is formed between adjacent bonding regions, the pocket being sized greater than a thickness of the support member wall to permit movement of the support member wall within the pocket. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An endoluminal prosthesis, comprising:
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a first tubular structure comprising expanded polytetrafluoroethylene; a second tubular structure comprising expanded polytetrafluoroethylene positioned concentrically about the first tubular structure, the first and second tubular structures having a length; and at least one radially expandable support member positioned between the first and second tubular structures, the support member comprising a wall with openings passing therethrough, wherein the length of the first and second tubular structures is less than a length of the radially expandable support member, and wherein the first tubular structure is bonded to the second tubular structure along two or more spaced apart bonding regions positioned within the openings of the support member, the spacing of adjacent bonding regions resulting in a pocket that permits movement of the support member therewithin. - View Dependent Claims (19, 20)
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Specification