Pleated composite ePTFE/textile hybrid covering
First Claim
Patent Images
1. A composite multilayer implantable material comprising:
- a first inner tubular layer formed of expanded polytetrafluoroethylene having a porous microstructure defined by nodes interconnected by fibrils, wherein said first layer has a plurality of pleated folds, each of said pleated folds forming a masked portion under said pleated folds;
a second tubular layer formed of textile material circumferentially disposed exteriorly to said first layer, wherein said first and second layers are secured to each other by an elastomeric bonding agent positioned along a contacting layer of said first and second layers; and
wherein said masked portion of each of said pleated folds is not secured to said second layer by said bonding agent to permit unfolding and longitudinal lengthening of said composite multilayer implantable material.
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Abstract
A composite multilayer implantable material having a first inner tubular layer formed of expanded polytetrafluoroethyene having a porous microstructure defined by nodes interconnected by fibrils, wherein said first layer has a plurality of pleated folds, a second tubular layer formed of textile material circumferentially disposed exteriorly to said first layer; and having an elastomeric bonding agent applied to one of said first layer or second layer and disposed within the pores of said microstructure for securing said first layer to said second layer.
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Citations
32 Claims
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1. A composite multilayer implantable material comprising:
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a first inner tubular layer formed of expanded polytetrafluoroethylene having a porous microstructure defined by nodes interconnected by fibrils, wherein said first layer has a plurality of pleated folds, each of said pleated folds forming a masked portion under said pleated folds; a second tubular layer formed of textile material circumferentially disposed exteriorly to said first layer, wherein said first and second layers are secured to each other by an elastomeric bonding agent positioned along a contacting layer of said first and second layers; and wherein said masked portion of each of said pleated folds is not secured to said second layer by said bonding agent to permit unfolding and longitudinal lengthening of said composite multilayer implantable material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A composite multilayer implantable structure comprising:
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a first inner tubular layer formed of expanded polytetrafluoroethylene having a porous microstructure defined by nodes interconnected by fibrils; a second tubular layer of expanded polytetrafluoroethylene circumferentially disposed exteriorly to said first layer, wherein said first and second layers have a plurality of pleated folds, each of said pleated folds being provided by doubling a continuous portion of said first layer and said second layer upon itself and pressing said continuous portion into an adjacent portion to define a masked portion under each of said pleated folds; a support structure positioned between said first and said second layers; a third tubular layer formed of textile material circumferentially disposed exteriorly to said second layer; and an elastomeric bonding agent applied to one of said second layer or said third layer for securing said second layer to said third layer, wherein said masked portion is not secured to said third tubular layer by said bonding agent to permit unfolding and longitudinal lengthening of said composite multilayer implantable structure. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification