Woven tubing for stent type blood vascular prosthesis and stent type blood vascular prosthesis using the tubing

• US 7,063,721 B2
• Filed: 03/18/2003
• Issued: 06/20/2006
• Est. Priority Date: 03/20/2002
• Status: Expired due to Term

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Seiren Company Limited, Terumo Kabushiki Kaisha
• Inventors: Takahashi, Yoshikazu, Yamazaki, Teruhisa, Wakabayashi, Sobei
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US10/389,748
• Publication Number:
  US 20030181970A1
• Time in Patent Office: 1,190 Days
• Field of Search: 623 149- 154, 435/29, 264/103, 661/69
• US Class Current: 623/1.51
• 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: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching

Abstract

A woven tubing for use in a stent type blood vascular prosthesis which contains a multifilament formed of two–five single filaments in at least part of warps and has the single filaments disposed in single lines, and a stent type blood vascular prosthesis using the woven tubing are described. The prosthesis combines a shape retaining property that is capable of maintaining its tubular shape without being crushed by the flow of blood with a high liquid tightness that is capable of reducing the leakage of blood to the exterior when implanted at the site of a lesion and allows prevention of the inflow of blood into the site of a lesion.

Claims

1. A woven tubing for use in a stent blood vascular prosthesis, comprising:

a multifilament warp element formed of only two to five single filaments; and

a weft element;

wherein the warp element and weft element are woven in such a manner that all of the single filaments forming the multifilament warp element are disposed in a single line.

2. A woven tubing according to claim 1, wherein a size of the single filament is in the range of 5.5–

50 dtex.

3. A woven tubing according to claim 1, wherein a total size of the multifilament warp element is in the range of 11 to 250 dtex.

4. A woven tubing according to claim 1, wherein the weft element includes a multifilament having a single filament size in the range of 0.1–

3.5 dtex and formed of 10–

1,000 single filaments.

5. A woven tubing according to claim 1, wherein the warp element and weft element are made of a polyester fiber, respectively.

6. A woven tubing according to claim 5, wherein the polyester fiber is at least one member selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyester-polyether block copolymers, and composite fibers thereof.

7. A woven tubing according to claim 1, wherein the tubing is a crimped tubing.

8. A woven tubing according to claim 1, wherein the tubing has a branched part.

9. A stent blood vascular prosthesis, comprising:

a woven tubing recited in claim 1; and

a stent to which the woven tubing is attached.

10. A woven tubing for use in a stent blood vascular prosthesis, comprising:

a plurality of woven warp elements and weft elements;

at least apart-of one of the warp elements being a multifilament warp element formed of at least two single filaments and not more than five single filaments; and

the warp elements and the weft elements being woven in such a manner that all of the single filaments of the at least one multifilament warp element are disposed in a single line between the weft elements.

11. A woven tubing according to claim 10, wherein a size of the single filament is in the range of 5.5–

50 dtex.

12. A woven tubing according to claim 10, wherein a total size of the at least one multifilament warp element is in the range of 11 to 250 dtex.

13. A woven tubing according to claim 10, wherein at least one of the weft elements includes a multifilament having a single filament size in the range of 0.1–

3.5 dtex and formed of 10–

1,000 single filaments.

14. A woven tubing according to claim 10, wherein the warp elements and weft elements are made of a polyester fiber, respectively.

15. A woven tubing according to claim 14, wherein the polyester fiber is at least one member selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyester-polyether block copolymers, and composite fibers thereof.

16. A woven tubing according to claim 10, wherein the tubing is a crimped tubing.

17. A woven tubing according to claim 10, wherein the tubing has a branched part.

18. A stent blood vascular prosthesis, comprising:

a woven tubing recited in claim 10; and

a stent to which the woven tubing is attached.

19. A woven tubing according to claim 10, wherein the woven tubing includes a total number of warps, the total number of warps being comprised of a plurality of the multifilament warp elements, and a ratio of the multifilament warp elements to other threads forming the tubing being in a range of 25:

75–

100;

0, assuming the total number of warps forming the tubing is 100.