Implantable prosthesis with displaceable skirt

• US 20060184229A1
• Filed: 04/06/2006
• Published: 08/17/2006
• Est. Priority Date: 06/25/2002
• Status: Active Grant

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Elliott, Chris
• Granted Patent: US 7,993,386 B2
• Time in Patent Office: Days
• US Class Current: 623/1.130
• CPC Class Codes: A61B 17/11 for performing anastomosis; Buttons for anastomosis
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching

Abstract

An implantable prosthesis is provided having a radially-expandable tubular body and at least one skirt extending therefrom. The skirt terminates in a peripheral edge, wherein at least portions of the peripheral edge are free and displaceable to a greater diameter of the tubular body. Thus, with the implantable prosthesis being a stent-graft used to treat an aortic aneurysm (e.g., abdominal aortic aneurysm (“AAA”)), the skirt may be used to inhibit Type I endoleaks upon its selective displacement in response to irregular aortic shaping and/or aneurysm neck expansion. The skirt may actively inhibit Type I endoleaks by forming a physical barrier against flow between the tubular body and the aortic wall. In addition, the skirt may passively inhibit endoleak formation by sufficiently restricting blood flow to allow coagulation and clot formation, which would act as a barrier against endoleakage.

Claims

1. An implantable prosthesis comprising:

at least one radially-expandable tubular body; and

at least one skirt extending from, and at least partially overlapping, said tubular body, said skirt terminating in a peripheral edge that is spaced from a juncture between said skirt and said tubular body, at least portions of said peripheral edge being free and displaceable to a greater diameter than said tubular body, wherein said skirt is coated with a material selected from the group consisting of collagen, fibrin, hyaluronic acid, chitosan, polysaccharide, and combinations thereof.

2. A prosthesis as in claim 1, wherein said skirt is at least partially supported by a scaffold.

3. A prosthesis as in claim 2, wherein said scaffold is at least partially formed of self-expandable material.

4. A prosthesis as in claim 2, wherein said scaffold includes a plurality of circumferentially-spaced tines which generally extend from said tubular body.

5. A prosthesis as in claim 4, wherein said tines are arcuate.

6. A prosthesis as in claim 1, wherein at least one hole is formed through said tubular body which is overlapped by said skirt.

7. A prosthesis as in claim 1, wherein said skirt includes a first portion that is extendable circumferentially outwardly from said tubular body.

8. A prosthesis as in claim 7, wherein said skirt includes a second portion extendable from said first portion to at least partially coextend with said tubular body.

9. A prosthesis as in claim 8, wherein said second portion is extendable to taper outwardly away from said tubular body.

10. The prosthesis as in claim 8, wherein said second portion is extendable to be generally parallel to said tubular body.

11. A prosthesis as in claim 7, wherein said first portion is at least partially trough-shaped such that force applied to said first portion in a direction generally parallel to said tubular body is partially re-directed to define a radial force directed away from said tubular body.

12. A prosthesis as in claim 1, wherein at least first and second skirts extend from, and overlap, said tubular body, said first and second skirts being disposed in opposite directions.

13. A prosthesis as in claim 12, wherein said first skirt extends from a juncture with said tubular body at a location closer to a first end of said tubular body than a second end of said tubular body.

14. A prosthesis as in claim 13, wherein said second skirt is supported by a scaffold.

15. A prosthesis as in claim 1, wherein a plurality of skirts extend from, and overlap, said tubular body.

16. A prosthesis as in claim 1, wherein said prosthesis includes a plurality of radially-expandable tubular bodies.

17. A prosthesis is in claim 16, further comprising at least one radially expandable support member disposed concentrically relative to said tubular bodies.

18. A prosthesis as in claim 1, further comprising at least one radially expandable support member disposed concentrically relative to said tubular body.

19. A prosthesis as in claim 1, wherein said implantable prosthesis is for treating an abdominal aortic aneurysm.

20. A prosthesis as in claim 1, wherein said skirt is formed of a material selected from the group consisting of polymeric material, textile, natural tissue, and combinations thereof.

21. A prosthesis as in claim 1, wherein said implantable prosthesis includes one or more therapeutic agents.