Self expanding bifurcated endovascular prosthesis

• US 7,520,895 B2
• Filed: 04/08/2002
• Issued: 04/21/2009
• Est. Priority Date: 06/19/1998
• Status: Expired due to Term

• Current Assignee: Endologix
• Original Assignee: Endologix
• Inventors: Shokoohi, Mehrdad M., Madrid, Gilbert, Douglas, Myles S.
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US10/119,525
• Publication Number:
  US 20020165602A1
• Time in Patent Office: 2,570 Days
• Field of Search: 606191-198, 623/1.11, 623/1.35, 623/1.15
• US Class Current: 623/1.35
• 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 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• 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: 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

Disclosed is a bifurcated tubular endoluminal vascular prosthesis, useful in treating, for example, an abdominal aortic aneurysm. The prosthesis comprises a self expandable wire support structure surrounded at least in part by a flexible tubular membrane. A delivery catheter and methods are also disclosed.

Claims

1. A self-expandable bifurcated endoluminal prosthesis, comprising:

a proximal wire support section having a proximal end, a distal end and a central lumen extending therethrough;

a first wire branch section at the distal end of the proximal support; and

a second wire branch section at the distal end of the proximal support;

wherein at least the proximal wire support section and the first wire branch section are formed from a single length of wire and the wire in the proximal wire support section comprises a series of proximal bends and a series of distal bends, creating a series of struts connecting the proximal bends and distal bends to form at least two axially adjacent tubular segments, joined by a connector therebetween and wherein the series of proximal bends, distal bends and struts form a series of triangles, each triangle being defined by one proximal bend and two distal bends or two proximal bends and one distal bend, further wherein at least one of the proximal bends is pivotably connected to at least one of the distal bends.

2. An endoluminal prosthesis as in claim 1, wherein the proximal support comprises at least three segments and two connectors.

3. An endoluminal prosthesis as in claim 1, wherein the wire in at least one of the first and second wire branch sections comprises a series of proximal bends and a series of distal bends, creating a series of struts connecting the proximal bends and distal bends to form a tubular segment wall.

4. An endoluminal prosthesis as in claim 3, wherein at least some of the struts in at least one of the proximal wire support section, the first wire branch section, and the second wire branch section are substantially linear.

5. An endoluminal prosthesis as in claim 3, wherein each segment comprises from about 4 proximal bends to about 12 proximal bends.

6. An endoluminal prosthesis as in claim 1, further comprising an eye on at least one of the proximal and distal bends in at least one of the proximal wire support section, the first wire branch section, and the second wire branch section.

7. An endoluminal prosthesis as in claim 5, wherein the at least two axially adjacent tubular segments in the proximal wire support section comprises a first tubular segment and a second tubular segment that is axially adjacent to the first tubular segment and at least one eye on a distal end of the first tubular segment that is connected to at least one corresponding eye on a proximal end of the second tubular segment.

8. An endoluminal prosthesis as in claim 6, wherein the corresponding eyes are connected with a suture.

9. An endoluminal prosthesis as in claim 6, further comprising a polymeric layer on the wire support.

10. An endoluminal prosthesis as in claim 9, wherein at least some of the coffesponding eyes are connected with a metal link.

11. An endoluminal prosthesis as in claim 9, wherein at least a first distal bend in a first of the axially adjacent tubular segments is connected to at least a first proximal bend in a second of the axially adjacent tubular segments and at least one of the first proximal bend and the first distal bend comprise an eye.

12. An endoluminal prosthesis as in claim 1, further comprising a polymeric layer on the wire support.

13. An endoluminal prosthesis as in claim 9, wherein the layer comprises a tubular PTFE sleeve surrounding at least a central portion of the prosthesis.

14. An endoluminal prosthesis as in claim 1, wherein at least one of the first wire branch section and the second wire branch section comprises a series of proximal bends and a series of distal bends creating a series of struts connecting the proximal bends and distal bends to form at least a first tubular segment and a second tubular segment that is axially adjacent to the first tubular segment, and at least one eye on a distal end of the first tubular segment that is connected to at least one corresponding eye on a proximal end of the second tubular segment.

15. An endoluminal prosthesis as in claim 1, wherein at least a first distal bend in a first of the axially adjacent tubular segments is connected to at least a first proximal bend in a second of the axially adjacent tubular segments and at least one of the first proximal bend and the first distal bend comprise an eye.

16. A one piece endoluminal prosthesis, comprising an elongate flexible wire, formed into a plurality of axially adjacent tubular segments spaced along an axis and defining a central lumen therethrough, each tubular segment comprising a zig zag section of the wire having a plurality of proximal bends and distal bends that form a series of triangles that extend circumferentially around an axis of the graft, with the wire continuing between each adjacent tubular segment, wherein the prosthesis is radially compressible into a first, reduced cross sectional configuration for implantation into a body lumen, and self expandable to a second, enlarged cross sectional configuration at a treatment site in a body lumen, said prosthesis further comprising a first branch support section and a second branch support section each in communication with the lumen and each configured to extend into the branched arteries and at least one moveable link connecting at least one proximal bend to at least one distal bend.

17. An endoluminal prosthesis as in claim 16, further comprising an outer tubular sleeve surrounding at least a portion of the prosthesis.

18. An endoluminal prosthesis as in claim 16, wherein the plurality of axially adjacent tubular segments comprises a first tubular segment and a second tubular segment that is axially adjacent to the first tubular segment and at least one distal bend on the first tubular segment is connected to at least one proximal bend from the second tubular segment.

19. An endoluminal prosthesis as in claim 18, wherein the connection comprises a pivotable connection.

20. An endoluminal prosthesis as in claim 19, wherein the connection comprises a metal link.

21. An endoluminal prosthesis as in claim 16, wherein at least a portion of the prosthesis has an expansion ratio of at least about 1:

4.

22. An endoluminal prosthesis as in claim 21, wherein at least a portion of the prosthesis has an expansion ratio of at least about 1:

5.

23. An endoluminal prosthesis as in claim 16, wherein at least a portion of the prosthesis has an expanded diameter of at least about 20 mm -30 mm in an unconstrained expansion, and the prosthesis is implantable using a catheter no greater than about 16 French.

24. A prosthesis as in claim 23, wherein at least a portion of the prosthesis has an expanded diameter of at least about 25 mm, and is implantable on a delivery device having a diameter of no more than about 16 French.

25. An endoluminal prosthesis as in claim 16, wherein the first and second branch support sections are bilaterally symmetrical.

26. An endoluminal prosthesis as in claim 16, wherein the first and second branch support sections have a length within the range of about 1 cm to about 5 cm.

27. An endoluminal prosthesis as in claim 16, wherein at least one of the first branch support section and the second branch support section comprises a series of proximal bends and a series of distal bends creating a series of struts connecting the proximal bends and distal bends to form at least a first tubular branch segment and a second tubular branch segment that is axially adjacent to the first tubular branch segment.

28. An endoluminal prosthesis as in claim 27, further comprising a polymeric layer on the axially adjacent tubular segments.

29. An endoluminal prosthesis as in claim 28, further comprising an eye on at least some of the distal and proximal bends on at least one of the first branch support section and the second branch support section.

30. An endoluminal prosthesis as in claim 29, wherein at least a first distal bend in the first tubular branch segment is connected to at least a first proximal bend in the second tubular branch segment and at least one of the first proximal bend and the first distal bend comprise an eye.

31. An endoluminal prosthesis as in claim 16, further comprising an eye on at least some of the bends.

32. An endoluminal prosthesis as in claim 16, wherein at least a first distal bend in a first of the axially adjacent tubular segments is connected to at least a first proximal bend in a second of the axially adjacent tubular segments and at least one of the first proximal bend and the first distal bend comprise an eye.