Seamless braided or spun stent cover

• US 20020111668A1
• Filed: 04/09/2002
• Published: 08/15/2002
• Est. Priority Date: 08/11/1999
• Status: Abandoned Application

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Smith, Scott
• Application Number:
  US10/119,236
• Publication Number:
  US 20020111668A1
• Time in Patent Office: Days
• US Class Current: 623/1.13
• 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: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A composite stent-graft tubular prosthesis includes a non-continuous tubular body formed of polytetrafluoroethylene components, providing axial and circumferential compliance to said prosthesis and a circumferentially distensible stent.

Claims

1. An implantable composite intraluminal prosthesis comprising,

a circumferentially distensible tubular support structure having opposed inner and outer surfaces;

and

a longitudinally;

non-continuous tubular body on at least one surface of the support structure, comprising PTFE components, each having a length and a width, said length being greater than said width;

said components being spirally wound, and positioned on said at least one surface.

2. A composite intraluminal prosthesis according to claim 1 wherein the longitudinally non-continuous polytetrafluoroethylene tubular body comprises at least two opposed spirally wound polytetrafluoroethylene components.

3. A composite intraluminal prosthesis as in claim 2 wherein the opposed polytetrafluoroethylene components are interwoven.

4. A composite intraluminal prosthesis as in claim 3 wherein said PTFE components comprise woven PTFE threads.

5. A composite intraluminal prosthesis as in claim 4 wherein at least one of said polytetrafluoroethylene threads is a braided thread comprising at least three PTFE filaments.

6. A composite intraluminal prosthesis according to claim 5 wherein a sealant is interspersed between said filaments.

7. A composite intraluminal prosthesis as in claim 1, further comprising,

another longitudinally, non-continuous PTFE tubular body on the other surface of the distensible support structure, said another non-continuous tubular body, comprising spirally wound PTFE components having a length and a width, said length being greater than said width;

said another tubular body being secured to said longitudinally non-continuous tubular body.

8. The composite intraluminal prosthesis of claim 1, further comprising:

a continuous tubular ePTFE tubular body on the other surface of the distensible support structure, said continuous tubular body comprising spirally wound PTFE components having a length and a width, said length being greater than said width;

said continuous tubular body secured to said longitudinally non-continuous tubular body to form said prosthesis.

9. A composite intraluminal prosthesis according to claim 8 wherein the longitudinally non-continuous polytetrafluoroethylene tubular body comprises at least two opposed spirally wound polytetrafluoroethylene components.

10. A composite intraluminal prosthesis as in claim 9 wherein the opposed polytetrafluoroethylene components are interwoven.

11. A composite intraluminal prosthesis as in claim 10 wherein said PTFE components comprise woven PTFE threads.

12. A composite intraluminal prosthesis as in claim 11 wherein at least one of said polytetrafluoroethylene threads is a braided thread comprising at least three PTFE filaments.

13. A composite intraluminal prosthesis according to claim 12 wherein a sealant is interspersed between said filaments.

15. The method of claim 14, further comprising:

a) providing a continuous tubular body on the other surface of the distensible support structure, and

b) securing the continuous tubular body to the discontinuous tubular body.

16. The method of claim 14, further comprising:

spirally winding at least two PTFE components to form another longitudinally non-continuous tubular layer on the other surface of the distensible support structure.

17. A method according to claim 14 wherein at least one of the PTFE components comprises a PTFE thread, comprising two or more polytetrafluoroethylene filaments arranged in a braided configuration.

18. A method according to claim 14 wherein the PTFE components are interwoven.

19. A method according to claim 14 wherein at least two of the PTFE strips are wound in opposed spirals.

20. A method according to claim 17 wherein a sealant is interspersed between said filaments.

14. A method of making an implantable composite intraluminal prosthesis, comprising:

a) providing a circumferentially distensible tubular support structure having opposed inner and outer surfaces;

b) providing at least two ePTFE components, each having a length greater than its width; and

,

c) spirally winding the components to form a non-continuous tubular body on at least one surface of the tubular support structure to make a composite with a support structure side and an ePTFE side.