Stent graft having floating yarns

• US 8,834,552 B2
• Filed: 12/23/2008
• Issued: 09/16/2014
• Est. Priority Date: 12/27/2007
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: DeBruyne, Michael P., Kuppurathanam, Shyam Sv
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): Woznicki, Jacqueline
• Application Number:
  US12/343,316
• Publication Number:
  US 20090171443A1
• Time in Patent Office: 2,093 Days
• Field of Search: 139/420.R, 139/24, 139/321, 623/1.13
• US Class Current: 623/1.13
• 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 to form a weave pattern, a portion of the warp yarns along the longitudinal axis of the graft body not being interwoven with the weft yarns such that the portion of the warp yarns defines loops floating over the weft yarns and aligned in the first direction, each loop being a variation in the weave pattern; and

an expandable stent disposed circumferentially about the longitudinal axis and received through each of the loops 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 warp and weft 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 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.

8. 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 to form a weave pattern, a portion of the warp yarns along the longitudinal axis of the graft body not being interwoven with the weft yarns such that the portion of the warp yarns defines loops floating over the weft yarns and aligned in the first direction, each loop being a variation the weave pattern;

an expandable stent disposed circumferentially about the longitudinal axis and received through each of the loops 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.

9. 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, providing 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 to form a weave pattern, a portion of the graft body having weft yarns that are not interwoven with the warp yarns such that a portion of the warp yarns defines loops floating over the weft yarns and aligned in the first direction circumferentially about the longitudinal axis, each loop being a variation in the weave pattern;

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

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

10. The method of claim 9 wherein the first direction is perpendicular to the second direction.

11. The method of claim 9 wherein the expandable stent is comprised of one of stainless steel, nitinol, conichrome.

12. The method of claim 9 wherein the warp and weft yarns comprise a polymer.

13. The method of claim 12 wherein the polymer is selected from the group consisting of polyester, polypropylene, polyethylene, polyurethane, and polytetrafluoroethylene.

14. The method of claim 12 wherein the polymer comprises polyester.

15. The method of claim 14 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.

16. The method of claim 15 wherein the first direction is perpendicular to the second direction.

17. The method of claim 9 wherein attaching includes soldering, or adhesive bonding.