Iliac artery stent graft

• US 20060287704A1
• Filed: 06/01/2006
• Published: 12/21/2006
• Est. Priority Date: 06/01/2005
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated), William A. Cook Australia Pty. Ltd (Cook Group Incorporated), William Cook Europe ApS (Cook Group Incorporated)
• Inventors: Hartley, David Ernest, Ivancev, Krasnodar
• Granted Patent: US 7,846,194 B2
• Time in Patent Office: Days
• US Class Current: 623/1.130
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2002/061 provided with means for allowing access to secondary lumens
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A side branch stent graft (1) suitable for the iliac arteries has a main tubular body (3) of a biocompatible graft material and a tubular side branch (5). The tubular side branch is affixed into the main tubular body so that a side branch lumen is in fluid communication with a main lumen. There is at least one external zig-zag stent (13) on the main tubular body proximal of the tubular side branch, one central external stent (14) which also encompasses the side arm, at least one external zig-zag stent (16) on the main tubular body distal of the tubular side branch and one internal zig-zag stent (15) at the distal end of the main tubular body. A reinforcing ring (9) is around the proximal end of the main tubular body and stitched thereto.

Claims

1. A side branch stent graft comprising a main tubular body of a biocompatible graft material and having a main lumen therethrough, a tubular side branch having a side branch lumen therethrough, the tubular side branch being affixed into the main tubular body so that the side branch lumen is in fluid communication with the main lumen, at least one external zig-zag stent on the main tubular body proximal of the tubular side branch, at least one external zig-zag stent on the main tubular body distal of the tubular side branch, one internal zig-zag stent at the distal end of the main tubular body, and a reinforcing ring around the proximal end of the main tubular body and stitched thereto.

2. A side branch stent graft as in claim 1 wherein there are one or two external zig-zag stents proximal of the tubular side branch.

3. A side branch stent graft as in claim 1 wherein there are from one to three external zig-zag stents distal of the tubular side branch.

4. A side branch stent graft as in claim 1 wherein the reinforcing ring around the proximal end of the tubular body comprises at least two turns of shape memory wire, each end of the shape memory wire terminating in a loop.

5. A side branch stent graft as in claim 1 wherein the tubular side branch comprises a connection socket for an extension stent.

6. A side branch stent graft as in claim 1 wherein the connection socket comprises a first resilient ring around the tubular side branch at a distal end thereof, a second resilient ring spaced apart along the tubular side branch from the first ring and a zig zag resilient stent between the first and second rings.

7. A side branch stent graft as in claim 6 wherein the zig zag resilient stent and the first and second rings are on the outside of the tubular body.

8. A side branch stent graft as in claim 6 wherein the first and second rings comprise shape memory wire.

9. A side branch stent graft as in claim 6 wherein the first and second rings comprise at least two turns of wire with each end terminating in a loop.

10. A side branch stent graft as in claim 6 wherein the zig zag resilient stent comprises a shape memory wire and the zig zag resilient stent defines a cylindrical form having a diameter less than that of the tubular side branch whereby to define a self contracting stent.

11. A side branch stent graft as in claim 1 wherein the a tubular side branch extends from the main tubular body at an acute angle thereto.

12. A side branch stent graft as in claim 11 wherein the acute angle is in the range of from 15 to 60 degrees and preferably 15 to 45 degrees.

13. A side branch stent graft as in claim 1 wherein the or each external zig-zag stents proximal of the tubular side branch has a length of 14 mm and are spaced apart by about 2 mm.

14. A side branch stent graft as in claim 1 wherein the or each external zig-zag stents distal of the tubular side branch has a length of 12 mm and are spaced apart by about 5 mm.

15. A side branch stent graft as in claim 11 comprising a central external zig-zag stent around the main tubular body and the tubular side branch.

16. A side branch stent graft as in claim 15 wherein the central external zig-zag stent has a length of 14 mm and is spaced apart from the stent proximal to it by about 2 mm and from the stent distal of it by about 5 mm.

17. A side branch stent graft as in claim 1 wherein the main tubular body has a diameter of about 12 mm and the tubular side branch has a diameter of about 8 mm.

18. A side branch stent graft as in claim 1 wherein the main tubular body has a diameter of about 12 mm proximal of the tubular side branch and a diameter distal of the tubular side branch of about 10 mm.

19. A side branch stent graft as in claim 1 wherein the main tubular body has a diameter of about 20 mm proximal of the tubular side branch and a diameter distal of the tubular side branch of about 16 mm.

20. A side branch stent graft as in claim 1 wherein the main tubular body has a length of about 69 mm to 119 mm and the tubular side branch has a length of about 25 mm.

21. A side branch stent graft as in claim 11 wherein the stent graft has a length from its proximal end to the distal end of the side arm of about 45 mm to 61 mm.

22. A side branch stent graft as in claim 11 wherein the stent graft has a length from its distal end to the distal end of the side arm of about 24 mm to 58 mm.