Elastomeric radiopaque adhesive composite and prosthesis

• US 20060058867A1
• Filed: 09/15/2004
• Published: 03/16/2006
• Est. Priority Date: 09/15/2004
• Status: Abandoned Application

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Inventors: Thistle, Robert C., Dimatteo, Kristian
• Application Number:
  US10/941,189
• Publication Number:
  US 20060058867A1
• Time in Patent Office: Days
• US Class Current: 623/1.130
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/12131 characterised by the type of occluding device
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61L 24/0089 containing inorganic fillers not covered by groups A61L24/0078 or A61L24/0084
• CPC Class Codes: A61L 24/02 containing inorganic materials
• CPC Class Codes: A61L 27/427 of other specific inorganic materials not covered by A61L27/422 or A61L27/425
• CPC Class Codes: A61L 27/48 with macromolecular fillers
• 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 31/128 containing other specific inorganic fillers not covered by A61L31/126 or A61L31/127
• CPC Class Codes: A61L 31/129 containing macromolecular fillers
• CPC Class Codes: C08J 2327/18 Homopolymers or copolymers of tetrafluoroethylene
• CPC Class Codes: C08J 5/124 using adhesives based on a macromolecular component
• CPC Class Codes: C09J 11/04 inorganic

Abstract

An elastomeric radiopaque adhesive composition which includes a biocompatible elastomeric matrix and a radiopaque material distributed therein in sufficient amounts to produce a radiopaque image. Further, a hybrid vascular prosthesis including a PTFE structure, a textile structure and a cured elastomeric bonding agent adhesively secures the PTFE to the textile. The elastomeric agent having radiopaque material impregnated therein in sufficient amounts to produce a radiopaque image.

Claims

1. An elastomeric radiopaque adhesive composition comprising

(a) a biocompatible elastomeric matrix, and

(b) a radiopaque material distributed therein in sufficient amounts to produce a radiopaque image.

2. The composition of claim 1, wherein said radiopaque material is metallic.

3. The composition of claim 2, wherein said radiopaque material is selected from a group consisting of gold, barium sulfate and combinations thereof.

4. The composition of claim 1, wherein said composition comprises between about 5 and 40 percent radiopaque material.

5. The composition of claim 1, wherein said radiopaque material comprises particles between the size of about 0.5 and 2.0 microns.

6. The composition of claim 1, wherein radiopaque material being concentrated in a designated area.

7. The composition of claim 1, wherein radiopaque material being uniformally distributed throughout said elastomeric matrix.

8. The composition of claim 1, wherein said elastomeric material is selected from the group consisting of polyurethanes, styrene/isobutylene/styrene block copolymers, silicones, and combinations thereof.

9. A hybrid vascular prosthesis comprising:

(a) a PTFE tubular structure;

(b) a textile tubular structure; and

(c) a cured elastomeric bonding agent adhesively securing said PTFE tubular structure and said textile tubular structure, said elastomeric agent having radiopaque material impregnated therein in sufficient amounts to produce a radiopaque image.

10. The prosthesis of claim 9, wherein said radiopaque material is metallic particulates.

11. The prosthesis of claim 10, wherein said metallic particulates is selected from a group consisting of gold, barium sulfate and combinations thereof.

12. The prosthesis of claim 9, wherein said elastomeric agent comprises about 5-40 percent radiopaque material.

13. The prosthesis of claim 9, wherein said textile structure is a knitted textile structure, a woven textile structure, a braided textile structure, a non-woven spun structure and combinations thereof.

14. The prosthesis of claim 9, wherein said PTFE structure is non-porous structure.

15. The prosthesis of claim 9, wherein said PTFE structure is porous structure.

16. The prosthesis of claim 9, wherein said cured elastomeric bonding agent is selected from the group consisting of polyurethanes, styrene/isobutylene/styrene block copolymers, silicones, and combinations thereof.

17. A hybrid vascular prosthesis comprising:

(a) a PTFE tubular structure;

(b) a textile tubular structure;

(c) a support tubular structure; and

(d) a cured elastomeric bonding agent adhesively securing said PTFE structure, said textile structure and said support structure, said elastomeric agent being impregnated with radiopaque material in sufficient amounts to produce a radiopaque image.

18. The prosthesis of claim 17, wherein said radiopaque material is metallic particulates.

19. The prosthesis of claim 18, wherein said metallic particulates is selected from a group consisting of gold, barium sulfate and combinations thereof.

20. The prosthesis of claim 19, wherein said elastomeric agent comprises between about 5 to about 40 percent metallic particulates.

21. The prosthesis of claim 17, wherein said support structure is a knitted structure, a woven structure, a braided structure, a non-woven spun structure and combinations thereof.

22. The prosthesis of claim 17, wherein said textile structure is a knitted textile structure, a woven textile structure, a braided textile structure, a non-woven spun structure and combinations thereof.

23. The prosthesis of claim 17, when said PTFE structure is porous structure.

24. The prosthesis of claim 17, wherein said PTFE structure is non-porous structure.

25. The prosthesis of claim 17, wherein said cured elastomeric bonding agent is selected from the group consisting of polyurethanes, styrene/isobutylene/styrene block copolymers, silicones, and combinations thereof.

26. A hybrid composite patch comprises:

(a) a PTFE substantially planar structure;

(b) a textile substantially planar structure;

(c) a cured elastomeric bonding agent adhesively securing said PTFE substantially planar structure and said textile substantially planar structure, said elastomeric agent having radiopaque material impregnated therein in sufficient amounts to produce a radiopaque image.

27. A hybrid composite vascular prosthesis comprising:

(a) a braided stent frame;

(b) a nonporous PTFE layer covering said stent frame;

(c) a polyester knitted textile layer covering said PTFE layer; and

(d) a cured radiopaque elastomeric composition thermally bonding said PTFE layer and said textile layer, said radiopaque elastomeric composition comprising radiopaque metallic particulates and a polyurethane adhesive, said polyurethane adhesive being impregnated with said particulates, in sufficient amounts to produce a radiopaque image.

28. The prosthesis of claim 27, wherein said radiopaque metallic particulates is selected from a group consisting of gold, barium sulfate and combinations thereof.

29. A method of forming a hybrid device comprising the steps of:

(a) providing a PTFE layer having opposed surfaces;

(b) providing a textile layer having opposed surfaces;

(c) providing a radiopaque elastomeric composition comprising an elastomeric bonding agent, and radiopaque metallic particulates, said particulates being impregnated into said elastomeric agent in sufficient amounts to produce a radiopaque image upon implantation of said device.

(d) applying a layer of said radiopaque elastomeric composition to one of said opposed surfaces of said PTFE layer or said textile layer;

(e) placing the other of said PTFE layer or said textile layer on top of said layer of radiopaque elastomeric composition, thereby defining a hybrid assembly having an interior surface and an exterior surface wherein said interior surface of said hybrid is one of said PTFE layer or said textile layer, and said exterior surface of said hybrid is the other of said PTFE layer or said textile layer;

(f) applying heat to said radiopaque elastomeric composition to adhesively bond said textile layer and said PTFE layer; and

(g) encapsulating said radiopaque material between said textile layer and said PTFE layer to provide a laminated hybrid assembly.

30. The method of claim 29, wherein said PTFE is nonporous.

31. The method of claim 29, wherein said PTFE is porous comprising microporous structure of nodes interconnected by fibrils.

32. The method of claim 31, wherein the step of applying said layer of said radiopaque elastomeric composition includes applying said layer to one of said opposed surfaces of said PTFE layer with said radiopaque elastomeric composition being disposed within said microporous structure.

33. The method of claim 29, wherein said textile layer is a hollow tubular textile layer having an inner and outer textile surface and said PTFE layer is applied to said inner textile surface.

34. The method of claim 29, wherein said textile layer is a hollow tubular textile layer having an inner and outer textile surface and said PTFE layer is applied to said outer textile surface.

35. The method of claim 29, wherein the step of applying heat to said radiopaque elastomeric composition includes heating said composition from about 325°

F. to about 450°

F.

36. The method of claim 29, further including the steps of:

providing a support structure; and

placing said support structure between said textile layer and said PTFE layer.

37. The method of claim 29, wherein said support structure is a knitted stent, a woven stent, a braided stent, a non-woven spun structure and combinations thereof.

38. The method of claim 29, further including the steps of:

providing a support structure; and

placing said PTFE layer and said textile layer onto said support structure.

39. The method of claim 36, wherein said support structure is a stent, said stent having two opposed ends and a stent wall therebetween.

40. The method of claim 39, wherein said stent is a knitted stent, a woven stent, a stretch-knit stent, a braided stent, and combinations thereof.

41. The method of claim 39, further including the steps of:

suturing said hybrid assembly to said stent at said opposed ends of said stent.

42. The method of claim 29, wherein said elastomeric bonding agent is selected from the group consisting of polyurethanes, styrene/isobutylene/styrene block copolymers, silicones, and combinations thereof.

43. The method of claim 29, wherein said elastomeric bonding agent is a polycarbonate urethane.

44. The method of claim 29, wherein said textile layer is knitted textile layer, a woven textile layer, a braided textile layer, a non-woven spun textile layer and combinations thereof.

45. The method of claim 29, wherein said textile layer and said PTFE layer are substantially planar.

46. The method of claim 45, wherein said hybrid device is a vascular patch.