One-branch stent-graft for bifurcated lumens

• US 20050049676A1
• Filed: 10/12/2004
• Published: 03/03/2005
• Est. Priority Date: 06/13/2003
• Status: Active Grant

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Kujawski, Dennis, Nazzaro, Patrice
• Granted Patent: US 7,491,231 B2
• Time in Patent Office: Days
• US Class Current: 623/1.130
• 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 comprising:

a bifurcated stent, wherein said stent includes an unbifurcated portion and two branches extending therefrom, and is adapted for placement with the bifurcation of the stent adjacent the bifurcation of the body lumen and the two branches extending into the branches of the bifurcated body lumen;

a graft lining or covering at least part of said bifurcated stent and defining a fluid passageway from said unbifurcated portion into one of said bifurcated stent branches; and

a closure preventing fluid from flowing to the other of said branches,

wherein said closure is a second stent-graft placed in said unbifurcated portion of said bifurcated stent and extending into only one 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 extends 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.