Multi-braid exterior tube

• US 20040176740A1
• Filed: 03/05/2003
• Published: 09/09/2004
• Est. Priority Date: 03/05/2003
• Status: Active Grant

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Chouinard, Paul
• Granted Patent: US 7,438,712 B2
• Time in Patent Office: Days
• US Class Current: 604/527
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61M 25/0012 with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
• CPC Class Codes: A61M 25/0053 having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
• CPC Class Codes: A61M 25/0662 Guide tubes

Abstract

A multiple braid exterior tube having a composite structure which includes an inner tubular layer, reinforcing layers and a polymer matrix layer. The exterior tube is formed with polymeric materials and metallic reinforcing braiding configured to provide greater tensile strength and stiffness. The exterior tube is used for a variety of medical devices such as a sheath component for intravascular devices and catheters.

Claims

1. A sheath component of an intraluminal delivery system comprising:

an inner tubular layer forming a polymeric luminal surface;

at least two braided layers disposed about said inner tubular layer; and

a polymeric matrix encapsulating said braided layers and joining said braided layers to said inner tubular layer.

2. The delivery system of claim 1, wherein said inner tubular layer is a member selected from the group consisting of fluoropolymers, polyesters, polyurethanes, polyolefins, polymethylacetates, copolymers and combinations thereof.

3. The delivery system of claim 1, wherein said inner tubular layer comprising polytetrafluoroethylene.

4. The delivery system of claim 1, wherein said polymeric luminal surface provides a lubricous surface.

5. The delivery system of claim 1, wherein at least two of said braided layers comprises a first braid layer and a second braid layer;

said first braid layer having individual wires cross-braided at a first angle; and

said second braid layer having individual wires cross-braided at a second angle, and wherein said first angle is greater than said second angle.

6. The delivery system of claim 5, wherein said first braid layer comprises individual wires cross-braided at an angle of about 100°

to about 160°

.

7. The delivery system of claim 5, wherein said second braid layer comprises individual wires cross-braided at an angle of about 70°

to about 120°

.

8. The delivery system of claim 1, wherein said two or more braided layers comprises a first braid layer and a second braid layer;

said first braid layer having individual wires cross-braided at a first angle; and

said second braid layer having individual wires cross-braided at a second angle, and wherein said first angle is less than said second angle.

9. The delivery system of claim 8, wherein said first braid layer comprises individual wires cross-braided at an angle of about 70°

to about 120°

.

10. The delivery system of claim 8, wherein said second braid layer comprises individual wires cross-braided at an angle of about 100°

to about 160°

.

11. The delivery system of claim 1, wherein said two or more braided layers comprises a first braid layer, a second braid layer disposed about said first braid layer, and a third braided layer disposed about said second braid layer;

wherein said first braid layer has individual wires cross-braided at a first angle; and

said second braided layer has individual wires cross-braided at a second angle, and said third braided layer has individual wires cross-braided at a third angle, and wherein said second angle is less than said first angle and said third angle.

12. The delivery system of claim 1, wherein said two or more braided layers comprises a first braid layer, a second braid layer disposed about said first braid layer, and a third braided layer disposed about said second braid layer;

wherein said first braid layer has individual wires cross-braided at a first angle; and

said second braided layer has individual wires cross-braided at a second angle, and said third braided layer has individual wires cross-braided at a third angle, and wherein said second angle is greater than said first angle and said third angle.

13. A sheath component of an intraluminal delivery system comprising:

an elongated tubular member comprising a inner layer, a first-braid layer disposed about the inner layer, a second braid layer disposed about the first braid layer, and a polymeric matrix layer joining together said inner layer, first braid layer and second braid layer.

14. The delivery system of claim 13, wherein said inner layer provides a lubricious surface.

15. The delivery system of claim 13, wherein said inner layer is a member selected from the group consisting of fluoropolymers, polyesters, polyurethanes, polyolefins, polymethylacetates, copolymers and combinations thereof.

16. The delivery system of claim 13, wherein said inner layer comprising polytetrafluoroethylene.

17. The delivery system of claim 13, wherein said first braid layer comprises a metal.

18. The delivery system of claim 17, wherein said metal is selected from the group consisting of stainless steel, gold, platinum, metal alloys and combinations thereof.

19. The delivery system of claim 13, wherein said second braid comprises a metal.

20. The delivery system of claim 19, wherein said metal is selected from the group consisting of stainless steel, gold, platinum, metal alloys and combination thereof.

21. The delivery system of claim 13, wherein said first braid layer has individual wires cross-braided at a first angle;

and said second braid layer has individual wires cross-braided at a second angle, and wherein said first angle is greater than said second angle.

22. The delivery system of claim 21, wherein said first braid layer comprises individual wires cross-braided at an angle of about 100°

to about 160°

.

23. The delivery system of claim 21, wherein said second braid layer comprises individual wires cross-braided at an angle of about 70°

to about 120°

.

24. The delivery system of claim 13, wherein said first braid layer has individual wires cross-braided at a first angle;

and said second braid layer has individual wires cross-braided at a second angle, and where said first angle is less than said second angle.

25. The delivery system of claim 24, wherein said first braid layer comprises individual wires cross-braided at an angle of about 100°

to about 160°

.

26. The delivery system of claim 24, wherein said second braid layer comprises individual wires cross-braided at an angle of about 70°

to about 120°

.

27. A delivery system for delivering an intraluminal device comprising:

(a) a tubular endoluminal prosthesis having a luminal surface and an opposed exterior surface, said prosthesis being radially distensible;

(b) a deployment device comprising an elongated outer sheath for maintaining said prosthesis in an unexpanded condition during delivery, said outer sheath being retractable with respect to said prosthesis, said outer sheath comprising an inner tubular layer, a first braid layer disposed about the inner layer, a second braid layer disposed about the first braid layer, and a polymeric matrix layer joining together said inner tubular layer, said first braid layer, and said second braid layer.

28. The delivery system of claim 27, wherein said inner tubular layer is a member selected from the group consisting of fluoropolymers, polyesters, polyurethanes, polyolefins, polymethylacetates, copolymers and combinations thereof.

29. The delivery system of claim 27, wherein said inner tubular layer comprising polytetrafluoroethylene.

30. The delivery system of claim 27, wherein said inner tubular layer provides a lubricous surface.

31. The delivery system of claim 27, wherein said first braid layer comprises a metal.

32. The delivery system of claim 31, wherein said metal is selected from the group consisting of stainless steel, gold, platinum, metal alloys and combination thereof.

33. The delivery system of claim 27, wherein said second braid comprises a metal.

34. The delivery system of claim 33, wherein said metal is selected from the group consisting of stainless steel, gold, platinum, metal alloys and combination thereof.

35. The delivery system of claim 27, wherein said first braid layer has individual wires cross-braided at a first angle;

and said second braid layer has individual wires cross-braided at a second angle, and wherein said first angle is greater than said second angle.

36. The delivery system of claim 35, wherein said first braid layer comprises individual wires cross-braided at an angle of about 100°

to about 160°

.

37. The delivery system of claim 35, wherein said second braid layer comprises individual wires cross-braided at an angle of about 70°

to about 120°

.

38. A method of making an elongated tubular member of an intraluminal deployment device comprising:

providing components of an inner tubular layer, a first braid layer, a second braid layer, and a polymer matrix layer;

disposing said first braid layer about the inner tubular layer;

disposing said second braid layer about the first braid layer;

disposing said polymer matrix layer about the second braid layer; and

integrally joining each of said layers to form said tubular member.

39. The method of claim 38, further comprising integrally joining each of said layers through the application of force.

40. The method of claim 38, further comprising integrally joining each of said layers through the application of heat and/or pressure.

41. The method of claim 38, wherein joining said tubular member comprising:

placing a fluorinated ethylene propylene heat shrink material over said polymeric matrix layer; and

heating said tubular member to permit bonding of said polymeric matrix to said layers.