Single puncture bifurcation graft deployment system

• US 7,691,135 B2
• Filed: 10/21/2003
• Issued: 04/06/2010
• Est. Priority Date: 03/11/1999
• Status: Expired due to Fees

• Current Assignee: Endologix
• Original Assignee: Endologix
• Inventors: Pham, To Van, Pham, Trinh Van, Shaolian, Samuel M., Madrid, Gilbert, Nguyen, Thanh Van
• Primary Examiner(s): Bui; Vy Q.
• Application Number:
  US10/690,227
• Publication Number:
  US 20040138735A1
• Time in Patent Office: 2,359 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.23, 623/1.35, 606/108, 606/194, 606/195, 606/198
• US Class Current: 623/1.11
• 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 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• 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
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

The present invention relates to the endoluminal repair of abdominal aortic aneurysms at the aortic and iliac bifurcation. In particular, a deployment system and graft are disclosed for deploying the bifurcated graft within both iliac branches, as well as the aortic trunk, from a single vascular access.

Claims

1. A method of transluminally deploying a bifurcation graft at the bifurcation of a main vessel into a first and second branch vessels, comprising:

providing a bifurcation graft having a main portion, a first branch portion, and a second branch portion, the bifurcation graft supported by a single delivery catheter with the main portion, the first branch and the second branch portion constrained in a radially compressed state by one or, the main portion having a diameter greater than a diameter of the first branch portion or the second branch portion;

introducing distally the delivery catheter and the bifurcation graft through a first access site in the first or second branch vessel;

transluminally advancing the bifurcation graft to the bifurcation;

manipulating the delivery catheter to position the bifurcation graft such that the main portion is in the main vessel, the first branch portion is positioned at least partially in the first branch vessel, and the second branch portion is positioned at least partially in the second branch vessel;

proximally retracting the bifurcation graft until the bifurcation of the graft is positioned in contact with the bifurcation between the first and second branch vessels, wherein the bifurcation of the graft is the juncture of the first branch portion and the second branch portion;

expanding the main, first branch and second branch portions from their radially compressed states; and

withdrawing the delivery catheter and each of the one or more restraints through the first access site;

wherein the bifurcation prevents distal migration of the bifurcation graft.

2. The method of claim 1, wherein the main vessel is the aorta artery, the first branch vessel is the ipsilateral iliac artery and the second branch vessel is the contralateral iliac artery.

3. The method of claim 1, wherein the step of proximally retracting the bifurcation graft until the bifurcation of the graft is positioned on the bifurcation between the first and second branch vessels comprises positioning the second branch portion on the bifurcation between the first and second branch vessels.

4. The method of claim 3, wherein the bifurcation graft is introduced through the first access site and into the first branch vessel.

5. The method of claim 1, wherein the step of expanding the main, first branch and second branch portions from their radially compressed states comprises expanding the main portion before the first and second branch portions.

6. The method of claim 1, wherein the step of expanding the first branch portion is accomplished by removing a tubular restraining sheath from around the first branch portion.

7. The method of claim 6, wherein the removing step comprises axially displacing the restraining sheath from the first branch portion.

8. The method of claim 1, wherein the second branch portion comprises a wire support formed from a memory metal alloy.

9. The method of claim 8, wherein the second branch portion is expanded by heating the wire support.

10. The method of claim 1, wherein the second branch portion comprises a peelable sheath.

11. The method of claim 1, wherein the step of expanding the second branch portion is accomplished by removing a peelable sheath from the second branch portion.

12. The method of claim 11, wherein the peelable sheath is removed by proximally retracting a release wire.

13. The method of claim 1, wherein the second branch portion comprises a self-expandable wire support.

14. The method of claim 13, wherein the second branch portion is restrained in a radially compressed state by a biodegradable adhesive.

15. The method of claim 1, wherein the step of expanding the second branch portion is accomplished by removing a restraining sheath from around the second branch portion.

16. The method of claim 15, wherein the restraining sheath is tubular.

17. The method of claim 15, wherein the restraining sheath is removed by distally advancing the restraining sheath.

18. The method of claim 15, wherein the removing step comprises tearing the restraining sheath.

19. The method of claim 15, wherein the removing step comprises axially displacing the restraining sheath relative to the second branch portion.

20. The method of claim 1, wherein the step of expanding the second branch portion is accomplished by applying an electrical current thereto.

21. The method of claim 1, wherein the second branch portion is expanded from its radially compressed state by axially displacing an elongate release element attached to a second branch portion restraint.