Composite ePTFE/Textile Prosthesis

• US 20130095264A1
• Filed: 12/05/2012
• Published: 04/18/2013
• Est. Priority Date: 06/11/2001
• Status: Active Application

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Inventors: Sowinski, Krzysztof, Rakos, Ronald, Dong, Jerry, Kujawski, Dennis, Haverkost, Patrick A., Chouinard, Paul F.
• Application Number:
  US13/706,277
• Publication Number:
  US 20130095264A1
• Time in Patent Office: Days
• US Class Current: 428/36.1
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61L 27/16 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 27/48 with macromolecular fillers
• CPC Class Codes: A61L 27/50 Materials characterised by their function or physical properties , e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
• CPC Class Codes: A61L 27/507 for artificial blood vessels apparatus for applying cells on a blood vessel prosthesis A61F2/062
• CPC Class Codes: A61L 31/048 obtained by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: B32B 1/08 Tubular products
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 5/022 Non-woven fabric
• CPC Class Codes: B32B 5/024 Woven fabric
• CPC Class Codes: B32B 5/026 Knitted fabric
• CPC Class Codes: B32B 5/245 another layer next to it being a foam layer
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene
• CPC Class Codes: Y10T 428/1362 : Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.]
• CPC Class Codes: Y10T 428/1369 : Fiber or fibers wound around each other or into a self-sustaining shape [e.g., yarn, braid, fibers shaped around a core, etc.]
• CPC Class Codes: Y10T 428/1393 : Multilayer [continuous layer]
• CPC Class Codes: Y10T 428/249985 : Composition of adhesive or bonding component specified
• CPC Class Codes: Y10T 442/3325 : Including a foamed layer or component
• CPC Class Codes: Y10T 442/469 : Including a foamed layer or component
• CPC Class Codes: Y10T 442/647 : Including a foamed layer or component

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.

Claims

1. A composite multilayer implantable structure comprising:

a first layer from a textile material;

a second layer formed of expanded polytetrafluoroethyene; and

an elastomeric bonding agent formed from an aromatic polycarbonate urethane applied to one of said first and second layers.

4. A composite structure of claim 1 wherein said first layer comprises a textile pattern selected from the group comprising knits, weaves, stretch-knits, braids, non-woven textile structures and combinations thereof.

6. A composite structure of claim 1 wherein said first and second layers are substantially planar.

7. A composite structure of claim 6 wherein said first and second planar layers form a vascular patch.

8. A composite structure of claim 7 wherein said vascular patch includes said first layer being a blood contact layer and said second layer being a tissue contacting layer.

9. A composite structure of claim 1 wherein said first and second layers are substantially tubular and wherein said first layer comprises a knitted textile pattern.

10. A composite structure of claim 1 wherein said first and second layers are substantially tubular and form an elongate tubular vascular graft.

12. A composite structure of claim 10 wherein said first layer of the vascular graft is adapted for contacting blood is positioned interior to said second layer adapted for contacting tissue.

13. A composite structure of claim 10 wherein said graft includes a plurality of longitudinally spaced crimps therealong.

14. A composite structure of claim 10 wherein said graft is helically wrapped with a monofilament externally therearound.

15. A composite structure of claim 14 wherein said monofilament comprises polypropylene.

17. A composite structure of claim 10 wherein said graft includes an external support coil helically positioned thereover.

20. A composite structure of claim 10 wherein said composite tubular structure is longitudinally compressed.

22. A composite structure of claim 1 wherein said textile material comprises PET.

23. A composite structure of claim 1 wherein said composite structure further comprises a third layer.

25. A composite structure of claim 23 wherein said third layer comprises ePTFE.

2-3. -3. (canceled)

11. (canceled)

16. (canceled)

18-19. -19. (canceled)

21. (canceled)

24. (canceled)

26-31. -31. (canceled)

33. A method of forming a vascular prosthesis comprising the steps of:

providing a first layer comprising ePTFE;

providing a textile layer having opposed surfaces;

applying an elastomeric bonding agent comprising an aromatic polycarbonate urethane to one of said opposed surfaces; and

securing said first layer relative to said textile layer with said bonding agent.

32. A composite structure of claim 33 wherein the step of securing the first layer relative to said textile layer with said bonding agent comprises thermal processing.

34-40. -40. (canceled)

41. A method of forming a composite implantable patch comprising the steps of:

providing an elongate planar ePTFE substrate;

applying a coating of an elastomeric bonding agent comprising an aromatic polycarbonate urethane to one surface of said ePTFE substrate; and

securing the elongate planar textile substrate to said coated surface of said ePTFE substrate.