PTFE composite multi-layer material
First Claim
1. A composite multi-layer material comprising:
- a first layer formed from unsintered substantially unexpanded polytetrafluoroethylene polymer and having a density in a range of about 1.2 gm/cc to about 2.3 gm/cc and having a plurality of pores having a nominal channel size of less than 5 micrometers; and
a second layer formed from an open structured material, wherein surfaces of the first and second layers are attached at a common interface.
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Abstract
A composite multi-layer material may generally comprise a d-PTFE material combined with an open structured material (either resorbable or non-resorbable) creating a composite multi-layer material. Attachment of the layers may be accomplished by stitching layers of material, exertion of hydraulic or other pressure, application of a biocompatible adhesive or heat, or some combination of the foregoing. Use of a d-PTFE, unexpanded material has multiple alternative uses, including without limitation, placement on the visceral side of a hernia that may minimize or even eliminate the incidence of abdominal adhesions. Alternatively, the material may be used to create tubing sufficient as a graft for treating abdominal aortic aneurysms.
82 Citations
64 Claims
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1. A composite multi-layer material comprising:
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a first layer formed from unsintered substantially unexpanded polytetrafluoroethylene polymer and having a density in a range of about 1.2 gm/cc to about 2.3 gm/cc and having a plurality of pores having a nominal channel size of less than 5 micrometers; and
a second layer formed from an open structured material, wherein surfaces of the first and second layers are attached at a common interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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- 29. A device for repairing soft tissue comprising a first and second layer attached to form a flat structure, wherein said first layer comprises unsintered substantially unexpanded polytetrafluoroethylene polymer having a density in a range of about 1.2 gm/cc to about 2.3 gm/cc and having a plurality of pores with a nominal channel size of less than 5 micrometers and wherein said second layer comprises an open structured material.
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32. A device for vascular tissue repair and grafting comprising a first and second layer attached to form a tube structure, wherein said first layer comprising unsintered substantially unexpanded polytetrafluoroethylene polymer having a density in a range of about 1.2 gm/cc to about 2.3 gm/cc and having a plurality of pores with a nominal channel size of less than 5 micrometers forms the interior of the tube structure and wherein said second layer comprising an open structured material forms the exterior of the tube structure.
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33. A method of treating a patient in need of tissue repair, comprising contacting the tissue in need of repair with a composite multi-layer material comprising:
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a first layer formed from unsintered substantially unexpanded polytetrafluoroethylene polymer and having a density in a range of about 1.2 gm/cc to about 2.3 gm/cc and having a plurality of pores having a nominal channel size of less than 5 micrometers; and
a second layer formed from an open structured material, wherein surfaces of the first and second layers are attached at a common interface. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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Specification