Inflatable intraluminal graft

• US 20030225453A1
• Filed: 11/05/2002
• Published: 12/04/2003
• Est. Priority Date: 03/03/1999
• Status: Abandoned Application

• Current Assignee: Endologix
• Original Assignee: Trivascular Incorporated
• Inventors: Murch, Clifford Rowan
• Application Number:
  US10/289,137
• Publication Number:
  US 20030225453A1
• Time in Patent Office: Days
• US Class Current: 623/1.21
• 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 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• 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 2250/0003 having an inflatable pocket filled with fluid, e.g. liquid or gas

Abstract

A collapsible stent graft for aortic aneurysms comprises a collapsible inner tubular member (26) and an outer layer (24) fused or adhered thereto such as to provide a spiral inflatable member (22) therebetween. The stent graft is inserted into an artery in the collapsed state and then expanded into position by introducing a liquid into the inflatable member and sealing the member. The graft is held in place by an expandable stent (40).

Claims

1. A collapsible stent graft, which comprises a collapsible tubular member for lining a blood vessel and an inflatable member extending around the tubular member and attached thereto, whereby inflation of the inflatable member expands the tubular member from a collapsed state to an expanded state.

2. A stent graft according to claim 1 wherein an outer layer is provided around the tubular member and is fused or adhered thereto so as to provide said inflatable member.

3. A stent graft according to claim 2 wherein the inner tubular member is formed of expanded polytetrafluoroethylene.

4. A stent graft according to claim 2 wherein the outer layer is formed of expanded polytetrafluoroethylene.

5. A stent graft according to claim 2, 3 or 4 wherein the outer layer is thrombogenic so as to encourage clotting of surrounding blood.

6. A stent graft according to any preceding claim wherein the inflatable member forms a spiral structure comprising a plurality of turns around the tubular member.

7. A stent graft according to claim 6 wherein there is a spacing of 1 to 2 mm between adjacent turns.

8. A stent graft according to any of claims 1 to 6 wherein the inflatable member is in the form of a zig-zag or square-wave pattern around the tubular member.

9. A stent graft according to any preceding claim provided with perforations, not within a region of the inflatable member, to allow ingrowth thereinto.

10. A stent graft according to any preceding claim wherein the tubular member has a wall thickness thinner than 0.1 mm.

11. A stent graft according to any preceding claim wherein an end of the tubular member is of undulating shape.

12. A stent graft according to any of claims 1 to 10 wherein an end of the tubular member is angled.

13. A stent graft according to any preceding claim wherein the tubular member is bifurcated.

14. A stent graft according to any preceding claim wherein the inflatable member contains a liquid for inflation thereof.

15. A stent graft according to claim 14 wherein the liquid is a resin which solidifies after injection into the inflatable member.

16. A stent graft according to claim 14 wherein the resin adheres to the inside walls of the inflatable member.

17. A stent graft according to any preceding claim which further comprises a stent having hooks for fixing the stent graft in place.