KINK RESISTANT BIFURCATED PROSTHESIS

• US 20100145434A1
• Filed: 02/11/2010
• Published: 06/10/2010
• Est. Priority Date: 12/23/1996
• Status: Abandoned Application

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Lau, Lilip, Thornton, Troy, Chan, Randy S.
• Application Number:
  US12/703,930
• Publication Number:
  US 20100145434A1
• Time in Patent Office: Days
• US Class Current: 623/1.160
• CPC Class Codes: A61F 2/06 Blood vessels
• 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 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• 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 2002/9586 the means being inside the balloon
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

The invention relates to an endoluminal prosthesis adapted for placement at a bifurcation site within the body. The stent or stent-graft may be constructed to have segments of differing structural properties. A section of the stent-graft may be constructed to have a single-lumen tubular stent member covering a multilumen graft member. The stent-graft may comprise at least two modular components adapted for in situ assembly. An extended cylindrical interference fit may be used to seal the modular components.

Claims

1. An implantable endoluminal prosthesis adapted for placement at a bifurcation site within a body, said device having at least two segments, at least one of said segments having structural properties different from another of said segments.

2. The endoluminal prosthesis of claim 1 wherein said device comprises a main body component and a contralateral leg component.

3. The endoluminal prosthesis of claim 1 wherein at least one of said components has a segment having an axial stiffness that is higher than adjacent segments.

4. The endoluminal prosthesis of claim 3 wherein said segment of higher axial stiffness comprises at least one extended strut.

5. A stent section comprising a wire structure having undulations, said undulations characterized by an alternating series of upper apexes and lower apexes, said wire structure arranged in a helical configuration having at least a first turn and a second turn, said first turn having at least one lower apex which extends to substantially meet a lower apex of said second turn.

6. The stent section of 5 wherein said upper and lower apexes of said of said first turn are in-phase with said apexes of said second turn.

7. The stent section of 5 wherein said stent section comprises multiple turns, each one of said multiple turns having at least one lower apex which extends to substantially meet a lower apex of an adjacent turn.

8. The stent section of 7 wherein the extended apex of each turn is spaced one undulation from the extended apex of a successive turn.

9. A modular prosthesis adapted for placement at a bifurcation site within a body, said prosthesis comprising:

a main body component having an extended cylindrical female receiving portion; and

a leg component having a mating cylindrical male portion, adapted for attachment to said extended cylindrical female receiving portion.

10. The modular prosthesis of claim 9 wherein said male portion is attached within said female portion by an interference fit.

11. The modular prosthesis of claim 10 wherein cylindrical male portion has a first diameter and said cylindrical female portion has a diameter smaller than said first diameter.

12. The modular prosthesis of claim 10 wherein said female receiving portion further comprises a zone of decreased diameter in the vicinity of an anchoring ring, said anchoring ring being attached to said female receiving portion.