Prosthesis comprising dual tapered stent

• US 20060122685A1
• Filed: 12/02/2004
• Published: 06/08/2006
• Est. Priority Date: 12/02/2004
• Status: Active Grant

• Current Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.)
• Original Assignee: Nitinol Development Corporation
• Inventors: Duerig, Tom, Bonsignore, Craig, Mast, Gregory
• Granted Patent: US 8,262,720 B2
• Time in Patent Office: Days
• US Class Current: 623/1.130
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• 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 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

The present invention is directed to a prosthesis for treating, repairing, and/or replacing an abdominal aortic aneurysm. The prosthesis includes a stent having a first end and a second end with an intermediate section therebetween. The first and seconds ends each include an anchor, wherein one or both anchor(s) has a diameter that is larger than the diameter of the intermediate section. The prosthesis also comprises graft material engaging at least a portion of the stent. The present invention is also directed to a prosthesis for repairing an aneurysm comprising a stent having a first end and a second end with an intermediate section disposed therebetween. The first and second ends each include means for sealing the respective ends to a structure, wherein the intermediate section has a diameter that is smaller than the diameter of the first or second end. Graft material engages at least a portion of the stent.

Claims

1. A prosthesis comprising:

a stent having a first end and a second end with an intermediate section therebetween, the first and second ends each including an anchor, at lest one of the anchors having a diameter larger than a diameter of the intermediate section; and

graft material engaging at least a portion of the stent.

2. The prosthesis of claim 1, wherein the stent is comprised of shape memory material.

3. The prosthesis of claim 2, wherein the stent is comprised of a nickel titanium alloy.

4. The prosthesis of claim 1, wherein the graft material engages the first end, second end and intermediate section of the stent.

5. The prosthesis of claim 1, wherein the intermediate section of the stent is flexible.

6. The prosthesis of claim 5, wherein the intermediate section is comprised of zig-zag shaped struts.

7. The prosthesis of claim 1, wherein the first end and second end of the stent are comprised of diamond shaped struts.

8. The prosthesis of claim 1, wherein the diameter of the intermediate section is between about 8 mm and about 12 mm.

9. The prosthesis of claim 1, wherein the diameter of the first end and the diameter of the second end is between about 15 mm and about 25 mm.

10. The prosthesis of claim 1, wherein the first end is configured to attach to another prosthesis within a lumen, and wherein the second end is configured to be anchored within an interior wall of a lumen.

11. The prosthesis of claim 1, wherein the graft material has a diameter that varies along its length and the stent has a diameter that matches the diameter of the graft material.

12. The prosthesis of claim 1, wherein the graft material has a diameter that varies along its length and the stent has a diameter that is larger than the diameter of the graft material.

13. The prosthesis of claim 1, wherein the intermediate section is more flexible than the anchors.

21. The prosthesis of claim 1, wherein the intermediate section is more flexible than the first and second ends.

14. A prosthesis for repairing an aneurysm comprising:

a stent having a first end and a second end with an intermediate section disposed therebetween, the first and second ends including means for sealing the respective ends to a structure, the intermediate section having a diameter that is smaller than a diameter of the first or second end; and

graft material engaging at least a portion of the stent.

15. The prosthesis of claim 14, wherein the stent is comprised of shape memory material.

16. The prosthesis of claim 14, wherein the diameter of the intermediate section is between about 8 mm and about 12 mm.

17. The prosthesis of claim 14, wherein the diameter of the first end and the diameter of the second end is between about 15 mm and about 25 mm.

18. The prosthesis of claim 14, wherein the first end is configured to form a seal with another prosthesis within a lumen, and wherein the second end is configured to form a seal with an interior wall of a lumen.

19. The prosthesis of claim 14, wherein the graft material has a diameter that varies along its length and the stent has a diameter that matches the diameter of the graft material.

20. The prosthesis of claim 14, wherein the graft material has a diameter that varies along its length and the stent has a diameter that is larger than the diameter of the graft material.