Composite ePTFE/textile prosthesis
First Claim
Patent Images
1. A composite multilayer implantable structure comprising:
- a first inner tubular layer and second outer tubular layer formed of expanded polytetrafluoroethyene having a porous microstructure defined by nodes interconnected by fibrils, said first and second layers having a support structure positioned therebetween;
a third tubular layer formed of textile material circumferentially disposed exteriorly to said first and second layers; and
an elastomeric bonding agent applied to one of said second layer or third layer and disposed within the pores of said microstructure for securing said second layer to said third layer.
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Abstract
A composite intraluminal prosthesis which is preferably used as a vascular prothesis includes a layer of ePTFE and a layer of textile material which are secured together by an elastomeric bonding agent. The ePTFE layer includes a porous microstructure defined by nodes interconnected by fibrils. The adhesive bonding agent is preferably applied in solution so that the bonding agent enters the pores of the microstructure of the ePTFE. This helps secure the textile layer to the ePTFE layer.
151 Citations
27 Claims
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1. A composite multilayer implantable structure comprising:
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a first inner tubular layer and second outer tubular layer formed of expanded polytetrafluoroethyene having a porous microstructure defined by nodes interconnected by fibrils, said first and second layers having a support structure positioned therebetween;
a third tubular layer formed of textile material circumferentially disposed exteriorly to said first and second layers; and
an elastomeric bonding agent applied to one of said second layer or third layer and disposed within the pores of said microstructure for securing said second layer to said third layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of forming a textile ePTFE composite graft comprising:
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providing a first tubular ePTFE structure having a microporous structure of nodes interconnected by fibrils;
providing a second tubular ePTFE structure having a microporous structure of nodes interconnected by fibrils;
providing a tubular textile structure;
placing a tubular support structure circumferentially around said first ePTFE tubular structure;
placing said second tubular ePTFE structure circumferentially around said tubular support structure;
applying a coating of an elastomeric bonding graft to a surface of said second ePTFE structure or said textile structure; and
securing said coated liner surface to said textile structure. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification