Twin bifurcated stent graft

• US 20070250154A1
• Filed: 04/19/2007
• Published: 10/25/2007
• Est. Priority Date: 04/19/2006
• Status: Active Grant

• Current Assignee: Cleveland Clinic Foundation, Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cleveland Clinic Foundation, Cook Incorporated (Cook Group Incorporated), William A. Cook Australia Pty. Ltd (Cook Group Incorporated)
• Inventors: Lawrence-Brown, Michael, Hartley, David, Greenberg, Roy
• Granted Patent: US 9,707,113 B2
• Time in Patent Office: Days
• US Class Current: 623/1.130
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/2476 Valves implantable in the body not otherwise provided for
• 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 2002/061 provided with means for allowing access to secondary lumens
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• 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
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A stent graft (40) has a tubular body with a first bifurcation (54) with first and second legs (50, 52) extending from the bifurcation. One of the legs (52) has a further bifurcation (62) to define a side arm. The stent graft can be deployed into the vasculature of a patient with the tubular body being in an aorta of the patient, a first leg extending down an iliac artery, a second leg being directed towards a contralateral iliac artery and the side arm directed to an internal artery of one of the iliac arteries. One of the legs can include a valved aperture to enable the placement of an indwelling catheter therethrough

Claims

1. A stent graft comprising a tubular body of a biocompatible graft material defining a main lumen therethrough, a bifurcation in the tubular body at one end thereof and a first leg and a second leg extending from the bifurcation, the first leg being a long leg and the second leg being a short leg, the first and second legs having respective first and second lumens therethrough and the first and second lumens being in fluid communication with the main lumen, characterised by the first long leg comprising a side arm with a side arm lumen therethrough and the side arm lumen being in fluid communication with the first leg lumen, whereby the stent graft can be deployed into the vasculature of a patient with the tubular body being in an aorta of the patient, the first leg extending down a common iliac artery, the second leg being directed towards a contralateral common iliac artery and the side arm on the first leg directed to an internal iliac artery of the iliac artery.

2. A stent graft as in claim 1 wherein the side arm comprises a tube of corrugated biocompatible graft material and the tube extends part helically around the first leg.

3. A stent graft as in claim 1 wherein the side arm comprises a tube of biocompatible graft material and at least one self expanding stent on the tube of biocompatible graft material.

4. A stent graft as in claim 1 wherein the first leg comprises an aperture proximally of the side arm and a valve arrangement to prevent fluid flow through the aperture from inside of the leg to outside of the leg.

5. A stent graft as in claim 4 wherein the aperture includes a resilient reinforcement ring around the aperture.

6. A stent graft as in claim 4 wherein the valve arrangement comprises a sleeve of a biocompatible graft material within the first leg and a self expanding stent within the sleeve, the sleeve being fastened at its proximal end to the first leg proximal of the aperture and the self expanding stent being fastened to the sleeve, whereby the self expanding stent forces the sleeve against the inner surface of the first leg around the aperture to prevent fluid flow through the aperture from inside of the leg to outside of the leg.

7. A stent graft as in claim 6 wherein the sleeve of a biocompatible graft material comprises a cylindrical form.

8. A stent graft as in claim 6 wherein the sleeve of a biocompatible graft material comprises a semi-cylindrical form.

9. A stent graft as in claim 4 wherein the valve arrangement comprises a valve assembly comprising a self expanding stent to which a part cylindrical portion of biocompatible graft material is stitched along spaced apart struts of the self expanding stent.

10. A stent graft as in claim 9 wherein the valve assembly further comprises a semi-circular resilient wire around the distal end of the part cylindrical portion of biocompatible graft material forming the valve member.

11. A stent graft comprising a tubular body of a biocompatible graft material defining a main lumen therethrough an aperture defining a fenestration in the tubular body and a valve arrangement to prevent fluid flow through the aperture from inside of the leg to outside of the leg.

12. A stent graft as in claim 11 wherein the aperture includes a resilient reinforcement ring around the aperture.

13. A stent graft as in claim 11 wherein the valve arrangement comprises a sleeve of a biocompatible graft material within the tubular body and a self expanding stent within the sleeve, the sleeve being fastened at its proximal end to the first leg proximal of the aperture and the self expanding stent being fastened to the sleeve, whereby the self expanding stent forces the sleeve against the inner surface of the tubular body around the aperture to prevent fluid flow through the aperture.

14. A stent graft as in claim 13 wherein the sleeve of a biocompatible graft material comprises a cylindrical form.

15. A stent graft as in claim 13 wherein the sleeve of a biocompatible graft material comprises a semi-cylindrical form.

16. A stent graft as in claim 11 wherein the valve arrangement comprises a valve assembly comprising a self expanding stent to which a part cylindrical portion of biocompatible graft material is stitched along spaced apart struts of the self expanding stent.

17. A stent graft as in claim 16 wherein the valve assembly further comprises a semi-circular resilient wire around the distal end of the part cylindrical portion of biocompatible graft material forming the valve member.

18. A stent graft comprising a tubular body of a biocompatible graft material defining a main lumen therethrough, a bifurcation in the tubular body at one end thereof and a first leg and a second leg extending from the bifurcation, the first leg being a long leg and the second leg being a short leg, the first and second legs having respective first and second lumens therethrough and the first and second lumens being in fluid communication with the main lumen, characterised by the first long leg comprising a side arm with a side arm lumen therethrough and the side arm lumen being in fluid communication with the first leg lumen, whereby the stent graft can be deployed into the vasculature of a patient with the tubular body being in an aorta of the patient, the first leg extending down a common iliac artery, the second leg being directed towards a contralateral common iliac artery and the side arm on the first leg directed to an internal iliac artery of the iliac artery, wherein the side arm comprises a tube of corrugated biocompatible graft material and the tube extends part helically around the first leg stent graft and the valve arrangement comprises a sleeve of a biocompatible graft material within the first leg and a self expanding stent within the sleeve, the sleeve being fastened at its proximal end to the first leg proximal of the aperture and the self expanding stent being fastened to the sleeve, whereby the self expanding stent forces the sleeve against the inner surface of the first leg around the aperture to prevent fluid flow through the aperture.