Fenestration Segment Stent-Graft and Fenestration Method

• US 20090259290A1
• Filed: 04/14/2008
• Published: 10/15/2009
• Est. Priority Date: 04/14/2008
• Status: Abandoned Application

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Thomas, Charles, Hanson, Curtis, Chu, Jack, Erickson, David, Ganesan, Prema, Bruszewski, Walter, Greenan, Trevor, Rust, Matthew, Morris, Jonathan
• Application Number:
  US12/102,320
• Publication Number:
  US 20090259290A1
• 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

Abstract

A method includes deploying a fenestration segment stent-graft into a main vessel such that a fenestration section of the fenestration segment stent-graft covers a first branch vessel emanating from the main vessel. The fenestration segment stent-graft includes a proximal section, a distal section, and the fenestration section attached to and between the proximal section and the distal section. The fenestration section has a greater resistance to tearing than the proximal section and the distal section facilitating formation of a collateral opening aligned with the branch vessel in the fenestration section.

Claims

1. A fenestration segment stent-graft comprising:

a proximal section comprising a woven graft cloth;

a distal section comprising a woven graft cloth; and

a fenestration section attached to and between said proximal section and said distal section, said fenestration section comprising knit cloth, said fenestration section having a greater resistance to tearing than said proximal section and said distal section.

2. The fenestration segment stent-graft of claim 1 wherein said proximal section comprises a proximal end and a distal end, said distal end being attached to a proximal end of said fenestration section by a first attachment means.

3. The fenestration segment stent-graft of claim 2 wherein said attachment means comprises stitching.

4. The fenestration segment stent-graft of claim 2 wherein a distal end of said fenestration section is attached to a proximal end of said distal section by a second attachment means.

5. The fenestration segment stent-graft of claim 4 wherein said second attachment means comprises stitching.

6. The fenestration segment stent-graft of claim 1 wherein said fenestration segment stent-graft defines a main lumen extending generally parallel to a longitudinal axis of said fenestration segment stent-graft and between a proximal main opening and a distal main opening of said fenestration segment stent-graft.

7. The fenestration segment stent-graft of claim 1 wherein said proximal section, said fenestration section, and said distal section have a uniform diameter.

8. The fenestration segment stent-graft of claim 1 further comprising at least one stent ring.

9. The fenestration segment stent-graft of claim 8 wherein said at least one stent ring comprises:

a stent ring attached to a proximal end of said proximal section.

10. The fenestration segment stent-graft of claim 8 wherein said at least one stent ring comprises:

a first stent ring attached to said proximal section; and

at least a second stent ring attached to said distal section.

11. The fenestration segment stent-graft of claim 1 wherein said fenestration section has an absence of stent rings.

12. The fenestration segment stent-graft of claim 1 further comprising a collateral opening in said fenestration section.

13. The fenestration segment stent-graft of claim 1 further comprising a branch prosthesis located within said collateral opening.

14. The fenestration segment stent-graft of claim 13 wherein said branch prosthesis comprises a proximal flange that engages said fenestration section.

15. The fenestration segment stent-graft of claim 1 further comprising a bifurcated endovascular device coupled to said distal section, said bifurcated endovascular device comprising:

a main body; and

two extension portions connected to said main body.

16. The fenestration segment stent-graft of claim 1 wherein said distal section comprises:

a main body; and

two extension portions connected to said main body.

17. The fenestration segment stent-graft of claim 16 wherein said proximal section comprises at least one branch prosthesis.

18. The fenestration segment stent-graft of claim 1 wherein said fenestration section comprises:

woven graft material; and

one or more fenestration regions comprising said knit cloth formed in said woven graft material of said fenestration section.

19. The fenestration segment stent-graft of claim 1 wherein said knit cloth is impregnated with an elastomer.

20. A fenestration segment stent-graft comprising:

a proximal section;

a distal section; and

a fenestration section attached to and between said proximal section and said distal section, said fenestration section having a greater resistance to tearing than said proximal section and said distal section.

21. The fenestration segment stent-graft of claim 20 wherein said fenestration section comprises:

graft material comprising loose woven fibers.

22. The fenestration segment stent-graft of claim 21 wherein said loose woven fibers are continuous.

23. The fenestration segment stent-graft of claim 21 wherein said graft material further comprises velour.

24. The fenestration segment stent-graft of claim 20 wherein said fenestration section comprises:

graft material comprising loose random fibers.

25. The fenestration segment stent-graft of claim 24 wherein said graft material further comprises velour.

26. The fenestration segment stent-graft of claim 20 wherein said fenestration section comprises:

graft material comprising a tubular braid.

27. The fenestration segment stent-graft of claim 20 wherein said fenestration section comprises:

graft material comprising low density monofilament graft material.

28. The fenestration segment stent-graft of claim 27 further comprising an anti-thrombogenic coating applied to said low density monofilament graft material.

29. The fenestration segment stent-graft of claim 28 further comprising a thrombogenic coating applied to said low density monofilament graft material, said anti-thrombogenic coating applied to said thrombogenic coating.

30. The fenestration segment stent-graft of claim 27 further comprising a thrombogenic coating applied to said low density monofilament graft material.

31. A method comprising:

deploying a fenestration segment stent-graft into a main vessel such that a fenestration section of said fenestration segment stent-graft covers a first branch vessel emanating from said main vessel, said fenestration segment stent-graft comprising;

a proximal section;

a distal section; and

said fenestration section attached to and between said proximal section and said distal section, said fenestration section having a greater resistance to tearing than said proximal section and said distal section.

32. The method of claim 31 further comprising:

forming a guidewire hole in said fenestration section aligned with said branch vessel.

33. The method of claim 32 further comprising:

dilating said guidewire hole to form a dilated guidewire hole.

34. The method of claim 33 wherein said dilating comprises inserting a cutting strut catheter into said guidewire hole.

35. The method of claim 34 further comprising retracting an outer sheath of said cutting strut catheter to expose a cutting strut device of said cutting strut catheter;

and

expanding said cutting strut device to enlarge said dilated guidewire hole into a collateral opening.

36. The method of claim 35 wherein said cutting strut device comprises struts comprising sharp edges.

37. The method of claim 35 further comprising deploying a branch prosthesis in said collateral opening.