One-branch stent-graft for bifurcated lumens

• US 7,491,231 B2
• Filed: 10/12/2004
• Issued: 02/17/2009
• Est. Priority Date: 06/13/2003
• Status: Expired due to Fees

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Kujawski, Dennis, Nazzaro, Patrice
• Primary Examiner(s): Stewart; Alvin J.
• Application Number:
  US10/963,354
• Publication Number:
  US 20050049676A1
• Time in Patent Office: 1,589 Days
• Field of Search: 623 135- 137, 623/1.13
• US Class Current: 623/1.35
• 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 2002/067 modular
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching

Abstract

A stent-graft is provided that includes a bifurcated stent adapted for placement at the bifurcation of a bifurcated body lumen. The stent-graft further includes a graft that lines or covers at least part of the bifurcated stent. The graft defines a fluid passageway from the unbifurcated portion into one of the bifurcated stent branches. A closure prevents fluid from flowing through the second of the branches and into the other branch of the body lumen.

Claims

1. A stent-graft for bypassing one branch of a bifurcated body lumen, the body lumen having an unbifurcated region and at least two bifurcated branches extending therefrom, the stent-graft comprising:

a bifurcated stent, wherein said stent includes an unbifurcated portion and a first branch and a second branch extending therefrom, the unbifurcated portion being adapted for placement in the unbifurcated region of the body lumen and the first and second branches being adapted to each extend into one of the bifurcated branches of the body lumen;

a graft lining or covering which lines or covers at least part of said bifurcated stent and defines a fluid passageway from said unbifurcated portion into the first branch; and

a second stent-graft having a fluid passage allowing fluid flow to the first branch and a closure preventing fluid flowing to the second branch,

wherein said closure is placed in said unbifurcated portion of said bifurcated stent and extends into only the first branch of said bifurcated stent.

2. The stent-graft recited in claim 1, wherein said bifurcated stent has a radially compressed configuration for introduction into the bifurcated body lumen and a radially expanded configuration for deployment within the bifurcated body lumen.

3. The stent-graft recited in claim 1, wherein said second stent-graft has a radially compressed configuration for introduction into said bifurcated stent and a radially expanded configuration for deployment within said bifurcated stent.

4. A stent-graft, adapted for placement at a native vessel bifurcation, comprising:

a straight bifurcated stent including,

a proximal portion adapted for placement in an unbifurcated region of the native bifurcation,

two distal portions, the first of which is adapted to extend from the unbifurcated region of the native bifurcation into one of the bifurcated branches of the native bifurcation, the second of which is adapted to extend toward the other bifurcated branch of the native bifurcation, and

a graft lining or covering which extends from said proximal portion of said straight bifurcated stent to said distal portions of said straight bifurcated stent; and

a tapered stent including,

a proximal tapered portion adapted for placement in said proximal portion of said straight bifurcated stent,

a distal portion adapted for placement in said first distal portion of said straight bifurcated stent, and

a graft lining or covering which extends from said proximal portion of said tapered stent to said distal portion of said tapered stent,

wherein said tapered stent defines a fluid passage to said first distal portion of said straight bifurcated stent, and is closed to fluid passage into said second distal portion of said straight bifurcated stent.

5. The stent-graft recited in claim 4, wherein said straight bifurcated stent has a radially compressed configuration for introduction into a lumen and a radially expanded configuration for deployment within the lumen.

6. The stent graft recited in claim 4, wherein said tapered stent has a radially compressed configuration for introduction into a lumen and a radially expanded configuration for deployment within the lumen.