STENT GRAFT HAVING FLOATING YARNS

• US 20090171443A1
• Filed: 12/23/2008
• Published: 07/02/2009
• Est. Priority Date: 12/27/2007
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: DeBruyne, Michael P., KUPPURATHANAM, SHYAM SV
• Granted Patent: US 8,834,552 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: D03D 1/00 Woven fabrics designed to make specified articles
• 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 49/06 Warp let-off mechanisms

Abstract

An implantable graft device is disclosed. The device comprises a graft body forming a lumen defining a longitudinal axis and comprising proximal and distal ends. The graft body comprises a woven fabric having warp yarns aligned in a first direction and weft yarns aligned in a second direction. The weft yarns are woven with the warp yarns. A portion of the warp yarns along the longitudinal axis of the graft body are not interwoven with the weft yarns, defining floating yarns having loops aligned in one of the first direction and the second direction. The device further comprises an expandable stent disposed circumferentially about the longitudinal axis and received through the loops of the floating yarns to attach the stent to the graft body.

Claims

1. An implantable graft device comprising:

a graft body forming a lumen defining a longitudinal axis and comprising proximal and distal ends, the graft body comprising a woven fabric having warp yarns aligned in a first direction and weft yarns aligned in a second direction, the weft yarns being interwoven with the warp yarns, a portion of warp yarns along the longitudinal axis of the graft body being non-woven with the weft yarns to define floating yarns having loops aligned in one of the first direction and second direction; and

an expandable stent disposed circumferentially about the longitudinal axis and received through the loops of the floating yarns to attach the stent to the graft body.

2. The device of claim 1 wherein the first direction is perpendicular to the second direction.

3. The device of claim 1 wherein the expandable stent is comprised of one of stainless steel, nitinol, conichrome.

4. The device of claim 1 wherein the yarns comprise a polymer.

5. The device of claim 4 wherein the polymer is selected from the group consisting of polyester, polypropylene, polyethylene, polyurethane, and polytetrafluoroethylene.

6. The device of claim 4 wherein the polymer comprises polyester.

7. The device of claim 1 wherein each of the yarns is round, obround, polygonal, rectangular, square, or free form, or combinations thereof.

8. The device of claim 5 wherein the body portion comprises between about 50 and about 300 weft yarns per inch and between about 10 and about 200 warp yarns per inch.

9. An implantable graft device comprising:

a graft body forming a lumen defining a longitudinal axis and comprising proximal and distal ends, the graft body comprising a woven fabric having warp yarns aligned in a first direction and weft yarns aligned in a second direction, the weft yarns being interwoven with the warp yarns, a portion of weft yarns along the longitudinal axis of the graft body are not interwoven with the warp yarns to define floating yarns having loops aligned in the first direction;

an expandable stent disposed circumferentially about the longitudinal axis and received through the loops of the floating yarns to attach the stent to the graft body;

an anchor portion extending from the proximal end of the graft body, the anchor portion having a first woven portion and a barb stent attached thereto for reduced migration of the graft device, the first woven portion being comprised of woven yarn; and

an end portion extending from the distal end of the graft body, the end portion having a second woven portion and a stent attached thereto, the second woven portion being comprised of woven yarn.

10. A method for making an implantable graft device, the method comprising:

forming a graft body having a lumen defining a longitudinal axis and comprising proximal and distal ends, defining a woven fabric having warp yarns aligned in a first direction and weft yarns aligned in a second direction and interwoven with the warp yarns, a portion of the graft body having weft yarns that are not interwoven with the warp yarns, defining floating yarns aligned in the first direction circumferentially about the longitudinal axis;

disposing a first end of an expandable stent circumferentially about the longitudinal axis and received through the floating yarns to attach the stent to the graft body; and

attaching a second end of the stent to the first end to close the stent about the graft body.

11. The device of claim 10 wherein the first direction is perpendicular to the second direction.

12. The device of claim 10 wherein the expandable stent is comprised of one of stainless steel, nitinol, conichrome.

13. The device of claim 10 wherein the yarns comprise a polymer.

14. The device of claim 13 wherein the polymer is selected from the group consisting of polyester, polypropylene, polyethylene, polyurethane, and polytetrafluoroethylene.

15. The device of claim 13 wherein the polymer comprises polyester.

16. The device of claim 15 wherein each of the yarns is round, polygonal, rectangular, square, or free form, or combinations thereof.

17. The device of claim 16 wherein the body portion comprises between about 50 and about 300 weft yarns per inch and between about 200 and about 10 warp yarns per inch.

18. The method of claim 10 wherein attaching includes soldering, or adhesive bonding.

19. The method of claim 17 wherein the first direction is perpendicular to the second direction.