Self-supporting woven vascular graft

• US 5,496,364 A
• Filed: 01/31/1994
• Issued: 03/05/1996
• Est. Priority Date: 08/28/1990
• Status: Expired due to Term

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: Meadox Medicals, Inc. (Boston Scientific Corporation)
• Inventors: Schmitt, Peter J.
• Primary Examiner(s): BRITTINGHAM, DEBRA
• Application Number:
  US08/189,310
• Time in Patent Office: 764 Days
• Field of Search: 623/1, 623/11, 623/12, 606/194, 606/198, 606/153, 600/36, 604/8
• US Class Current: 623/1.52
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: D03D 15/283 synthetic polymer-based, e.g. polyamide or polyester fibres cellulose-based artificial fibres D03D15/225
• CPC Class Codes: D03D 15/41 with specific twist
• CPC Class Codes: D03D 15/46 Flat yarns, e.g. tapes or films
• CPC Class Codes: D03D 15/49 textured chenille D03D27/18; curled; crimped
• CPC Class Codes: D03D 15/56 elastic
• CPC Class Codes: D03D 15/573 Tensile strength
• CPC Class Codes: D03D 27/00 Woven pile fabrics
• CPC Class Codes: D03D 3/02 Tubular fabrics
• CPC Class Codes: D10B 2321/042 polymers of fluorinated hydrocarbons, e.g. polytetrafluoroethene [PTFE]
• CPC Class Codes: D10B 2331/04 polyesters, e.g. polyethylene terephthalate [PET]
• CPC Class Codes: D10B 2331/10 polyurethanes
• CPC Class Codes: D10B 2401/041 thermoplastic; thermosetting
• CPC Class Codes: D10B 2401/061 elastic
• CPC Class Codes: D10B 2401/062 stiff, shape retention
• CPC Class Codes: D10B 2509/06 Vascular grafts; stents

Abstract

A woven synthetic fabric tubular vascular graft including, a stiffening component in the filling yarn is self supporting without crimping the walls of the graft. The graft is woven from warp ends of multifilament polyester yarns and elastomeric yarns in the warp and a filling yarn which includes multifilament and monofilament polyester yarns which have been twisted together. Longitudinal and radial compliance provide for improved kink resistance making the tubular grafts suitable for use in medium and small diameter peripheral applications. A preferred graft has an outer velour surface and a smooth inner surface.

Claims

1. A self-supporting tubular woven synthetic vascular graft, comprising:

at least one warp yarn and at least one filling yarn woven together to form a weave, and

said filling yarn including a stiffening component to provide radial burst strength, dimensional stability and radial rigidity sufficient to maintain the lumen of the tubular structure open without crimping; and

wherein said stiffening component is present throughout the length of the weave and is present in each pick of the weave.

2. The woven synthetic vascular graft of claim 1, wherein the stiffening component is a textile yarn.

3. The woven synthetic vascular graft of claim 2, wherein the textile yarn is a monofilament yarn.

4. The woven synthetic vascular graft of claim 3, wherein the monofilament filling yarn is combined with multifilament yarns.

5. The woven synthetic vascular graft of claim 3, wherein the monofilament textile yarn is a polyethylene terephthalate yarn.

6. The woven synthetic vascular graft of claim 3, further including a plurality of warp ends including multifilament yarns.

7. The woven synthetic vascular graft of claim 6, wherein the warp ends include elastomeric yarns.

8. The woven synthetic vascular graft of claim 1, wherein the stiffening component is non-fusible.

9. The woven vascular graft of claim 1, wherein the tubular graft is bifurcated having a main body portion and two branches connected to the main body portion.

10. A self-supporting tubular woven synthetic vasular graft, comprising:

a plurality of warp yarns woven with at least one filling yarn to provide a weave; and

wherein said filling yarn comprises a 2-ply yarn, one of said plies comprising a stiffening component which is set in a circumferential condition to provide radial burst strength, dimensional stability and radial rigidity sufficient to maintain the lumen of the tubular structure open and self-supporting without crimping.

11. The woven vascular graft of claim 10, wherein the warp yarns are polyethylene terephthalate.

12. The woven vascular graft of claim 10, wherein the stiffening component is a polyethylene terephthalate yarn.

13. The woven vascular graft of claim 10, wherein the filling yarn includes monofilament yarn twisted together with multifilament yarn.

14. The woven vascular graft of claim 13, wherein the multifilament component of the filling yarn is polyethylene terephthalate yarn.

15. The woven vascular graft of claim 14, wherein the multifilament and monofilament components of the filling yarn are polyethylene terephthalate.

16. The woven vascular graft of claim 15, wherein the monofilament component of the filling yarn is polyethylene terephthalate wound together with preshrunk, texturized multifilament polyethylene terephthalate.

17. The woven vascular graft of claim 16, wherein the multifilament yarn of the warp is preshrunk.

18. The woven vascular graft of claim 17, wherein the preshrunk yarn is polyethylene terephthalate.

19. The woven vascular graft of claim 10, including a plurality of warp yarns which include at least one elastomeric yarn.

20. The woven vascular graft of claim 19, wherein the elastomeric yarn is a polyurethane.

21. The woven vascular graft of claim 19, wherein the elastomeric yarn is a styrene-ethylene-butylene-styrene block copolymer.

22. The woven vascular graft of claim 10, wherein the warp yarns include preshrunk texturized and unshrunk untexturized polyethylene terephthalate yarn.

23. The woven vascular graft of claim 10, wherein the warp yarns include preshrunk texturized and unshrunk texturized polyethylene terephthalate yarn.

24. The woven vascular graft of claim 10, wherein the warp yarns include a plurality of multifilament yarns and elastomeric yarns, and the elastomeric yarn alternates with the multifilament yarn.

25. The woven vascular graft of claim 24, wherein two ends of multifilament yarn alternate with one end of elastomeric yarn.

26. The woven vascular graft of claim 10, wherein the graft has at least one velour surface of a plurality of warp pile of multifilament yarn.

27. The woven vascular graft of claim 26, wherein the warp pile yarns alternate each warp ground yarn.

28. The woven vascular graft of claim 37, wherein the vascular graft is a tube with a single outside velour surface and a smooth interior surface, the velour surface formed from warp pile yarns of unshrunk texturized multifilament yarn.

29. The woven vascular graft of claim 28, wherein the warp pile yarn is unshrunk texturized polyethylene terephthalate.

30. The woven vascular graft of claim 29, wherein the warp pile yarn is 2/40/27 (1.5s) unshrunk texturized polyethylene terephthalate yarn.

31. The woven vascular graft of claim 30, wherein the warp ground yarns include 1/70/54 (5z) unshrunk untexturized polyethylene terephthalate yarn and 140 denier polyurethane elastomeric yarn, alternating two ends of multifilament yarn and one end of elastomeric yarn.

32. The woven vascular graft of claim 31, wherein the warp ground yarns include 1/70/54 (5z) preshrunk untexturized polyethylene terephthalate yarn and 5 mil elastomeric styrene-ethenylene-butylene-styrene monofilament yarn, alternating two ends of multifilament yarn and one end of monofilament 5 mil styrene-ethylene-butylene-styrene block copolymer yarn.

33. The woven vascular graft of claim 37, wherein the warp pile yarn is 2/40/27 (1.5s) unshrunk texturized polyethylene terephthalate yarn.

34. The woven vascular graft of claim 33, wherein the filling yarn is 5 mil monofilament polyethylene terephthalate yarn wound together with 2/40/27 (1.5z) preshrunk texturized polyethylene terephthalate yarn.

35. The woven vascular graft of claim 10, wherein the ends of the tube have been cauterized.

36. The woven vascular graft of claim 10, wherein the tubular graft is bifurcated having a main body portion and two branches.

37. The woven vascular graft of claim 10, wherein the graft has a circular cross-section and is straight longitudinally.

38. The woven vascular graft of claim 10, wherein the graft has a circular cross-section and is curved along its length.

39. The woven vascular graft of claim 10, wherein the stiffening component is a non-fusible yarn.

40. The woven vascular graft of claim 10, wherein the tubular graft is bifurcated having a main body portion and two branches connected to the main body portion.

41. A self-supporting tubular single velour woven synthetic vascular graft, comprising:

a plurality of warp ground yarns including multifilament yarn;

a plurality of warp pile yarns of multifilament yarn; and

a filling yarn comprising a monofilament yarn wound together with multifilament yarn including a stiffening component woven throughout the weave, the stiffening component to maintain the lumen of the tubular structure open and self-supporting without crimping.

42. The woven vascular graft of claim 41, wherein the filling yarn is monofilament polyethylene terephthalate wound together with preshrunk texturized multifilament polyethylene terephthalate yarns.

43. The woven vascular graft of claim 42, wherein the warp ground yarns are alternating preshrunk untexturized multifilament polyethylene terephthalate yarns and elastomeric yarns.

44. The woven vascular graft of claim 43, wherein the vascular graft is a tube with a single outside velour surface and a smooth interior surface, the velour surface formed from warp pile ends of unshrunk texturized multifilament polyethylene terephthalate yarn.

45. The woven vascular graft of claim 44, wherein the warp pile yarns are 2/40/27 (1.5s) unshrunk texturized polyethylene terephthalate yarns.

46. The woven vascular graft of claim 45, wherein the warp ground yarns include 1/70/60 (5z) preshrunk untexturized yarn and elastomeric monofilament yarn, alternating two ends of multifilament yarn and one end of elastomeric yarn.

47. The woven vascular graft of claim 46, wherein the fill yarn is 5 mil monofilament polyethylene terephthalate yarn wound together with 2/40/27 (1.5s) preshrunk texturized polyethylene terephthalate yarn.

48. The woven vascular graft of claim 41, wherein the stiffening component is a non-fusible yarn.

49. The woven vascular graft of claim 41, wherein the warp ground yarns include elastomeric yarn.

50. The woven vascular graft of claim 41, wherein the tubular graft is bifurcated having a main body portion and two branches connected to the main body portion.