Endovascular graft

• US 7,081,129 B2
• Filed: 04/24/2002
• Issued: 07/25/2006
• Est. Priority Date: 02/09/1998
• Status: Expired due to Term

• Current Assignee: Endologix
• Original Assignee: Boston Scientific Scimed Incorporated
• Inventors: Chobotov, Michael V.
• Primary Examiner(s): BUI, VY Q
• Application Number:
  US10/132,754
• Publication Number:
  US 20020116048A1
• Time in Patent Office: 1,553 Days
• Field of Search: 623/1.13, 623 136- 137, 623/1.15, 623/1.23, 623/1.25, 606/108, 606/191, 606/194, 606/198
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/06 Blood vessels
• 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 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/945 hardenable, e.g. stents formed in situ
• 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 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0034 D-shaped
• CPC Class Codes: A61F 2250/0003 having an inflatable pocket filled with fluid, e.g. liquid or gas
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0071 breakable or frangible

Abstract

An endovascular graft which is configured to conform to the morphology of the vessel to be treated and which is made from an inflatable structure having a proximal end with a proximal inflatable cuff and a distal end with a distal inflatable cuff. At least one elongated inflatable channel is disposed between and in fluid communication with fluid tight chambers of the inflatable cuffs which may contain rupture discs therebetween which can be configured to rupture at different pressures. A thin flexible barrier disposed between the inflatable cuffs and the elongated inflatable channel of the frame so as to form a tubular structure defining a longitudinal channel to confine a flow of blood or other fluid therethrough. The graft may also have an expansion member attached to the proximal end of the graft which is preferably made of linked expandable rings of pseudoelastic shape memory alloy which is self expanding and prevents axial displacement of the graft once it is deployed.

Claims

1. An endovascular graft for placement in a patient'"'"'s body channel, comprising:

a) a flexible tubular structure having a lumen extending from a proximal end to a distal end with a proximal end portion adjacent the proximal end, said proximal end portion comprises an inflatable cuff, and

b) an expansion member disposed proximal to and axially spaced from the inflatable cuff and configured to expand in an outward radial direction sufficiently to mechanically anchor to the patient'"'"'s body channel, said expansion member comprising outwardly directed anchoring protuberances.

2. The endovascular graft of claim 1, wherein the flexible tubular structure comprises a porous polymer.

3. The endovascular graft of claim 2, wherein the porous polymer comprises ePTFE.

4. The endovascular graft of claim 1, wherein the expansion member comprises a stent.

5. The endovascular graft of claim 4, wherein the stent comprises a shape memory alloy.

6. The endovascular graft of claim 1, further comprising an elongated inflatable channel in fluid communication with the inflatable cuff.

7. The endovascular graft of claim 6, wherein the graft further comprises a distal end portion adjacent the distal end, said distal end portion comprises a distal inflatable cuff.

8. The endovascular graft of claim 7, further comprising an expansion member disposed distal of the distal inflatable cuff.

9. The endovascular graft of claim 6, wherein the expansion member is configured to exert an outward radial force greater than an outward radial force exerted by the proximal inflatable cuff in an inflated state.

10. The endovascular graft of claim 6, wherein the elongated inflatable channel is in a longitudinal configuration with respect to the tubular structure.

11. The endovascular graft of claim 6, wherein the elongated inflatable channel comprises a plurality of interconnected rings.

12. The endovascular graft of claim 1, wherein the flexible tubular structure further comprises a flexible barrier layer, said barrier layer disposed over the inflatable cuff and the elongated inflatable channel.

13. The endovascular graft of claim 1, wherein the expansion member comprises openings through a wall of the expansion member.

14. The endovascular graft of claim 1, wherein the expansion member is self-expanding.

15. The endovascular graft of claim 1, wherein the expansion member comprises a plurality of linked expandable rings.

16. The endovascular graft of claim 15, wherein the expandable rings are formed in a continuous loop comprising a serpentine or zig-zag pattern along a circumference of the loop.

17. An endovascular graft for placement in a patent'"'"'s body channel, comprising:

a) a flexible tubular structure having a lumen extending from a proximal end to a distal end with a proximal end portion adjacent the proximal end, said proximal end portion comprising an inflatable cuff; and

b) a stent coupled to the flexible tubular structure, disposed proximal to and axially spaced from the inflatable cuff and configured to expand in an outward radial direction sufficiently to mechanically anchor to the patient'"'"'s body channel; and

c) an elongated inflatable channel in fluid communication with the inflatable cuff.