Method and system for treating an ostium of a side-branch vessel

• US 20040260378A1
• Filed: 06/17/2003
• Published: 12/23/2004
• Est. Priority Date: 06/17/2003
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Ave
• Inventors: Goshgarian, Justin
• Granted Patent: US 7,105,015 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/821 Ostial stents

Abstract

The present invention provides a method and system for treating an ostium of a side-branch vessel. The system comprises a catheter, a first inflatable member, a stent disposed on the first inflatable member, and a second inflatable member. The first inflatable member is disposed on a distal portion of the catheter, while the second inflatable member is disposed on a proximal portion of the catheter. The first inflatable member is inflated a first time to expand the stent within the side branch. The first inflatable member is then deflated, advanced, and inflated a second time to anchor the system while the second inflatable member is inflated to conform a portion of the stent to the ostium of the side-branch vessel.

Claims

1. A system for treating an ostium of a side-branch vessel, comprising:

a catheter;

a first inflatable member disposed on a distal portion of the catheter;

a stent disposed on the first inflatable member; and

a second inflatable member disposed on a proximal portion of the catheter;

wherein the first inflatable member is inflated a first time to expand the stent within the side-branch vessel, deflated, advanced, and inflated a second time to anchor the system while the second inflatable member is inflated to conform a portion of the stent to the ostium of the side-branch vessel.

2. The system of claim 1 further comprising at least one radiopaque marker, wherein the radiopaque marker aids in positioning the system.

3. The system of claim 1 wherein the first inflatable member becomes generally cylindrical upon inflation.

4. The system of claim 1 wherein the second inflatable member becomes generally spherical upon inflation.

5. The system of claim 1 wherein the first inflatable member includes a contractile member to aid in returning the first inflatable member to an uninflated configuration upon deflation.

6. The system of claim 1 wherein the stent comprises a body portion and an end portion.

7. The system of claim 6 wherein the body portion and the end portion have different material properties.

8. The system of claim 6 wherein the body portion and the end portion have different geometric configurations.

9. The system of claim 1 wherein the stent further comprises a therapeutic agent operably disposed on a surface of the stent.

10. A method for treating an ostium of a side-branch vessel, comprising:

inserting a catheter into a side-branch vessel, the catheter comprising a first inflatable member disposed on a distal portion of the catheter, a first stent disposed on the first inflatable member, and a second inflatable member disposed on a proximal portion of the catheter;

positioning the catheter such that the first stent is at least partially within the side-branch vessel and adjacent the ostium of the vessel;

inflating the first inflatable member to expand the first stent;

deflating the first inflatable member;

advancing the catheter to a position such that the second inflatable member is at least partially within the expanded stent and adjacent the ostium of the vessel;

re-inflating the first inflatable member to anchor the catheter within the side-branch vessel;

inflating the second inflatable member to conform a portion of the stent to the ostium of the side-branch vessel;

deflating the first and second inflatable members; and

removing the catheter from the side-branch vessel.

11. The method of claim 10 further comprising using a single guide wire.

12. The method of claim 10 further comprising using a therapeutic agent, the therapeutic agent operably disposed on the stent.

13. The method of claim 10 further comprising using at least one radiopaque marker, the radiopaque marker operably disposed on the catheter.

14. The method of claim 10 wherein inflating the first inflatable member comprises expanding the first inflatable member into a generally cylindrical shape.

15. The method of claim 10 wherein inflating the second inflatable member comprises expanding the second inflatable member into a generally spherical shape.

16. The method of claim 10 wherein inflating the second inflatable member conforms an end portion of the stent to the ostium of the side-branch vessel, the end portion having material properties different from those of a body portion of the stent.

17. The method of claim 10 wherein when delivering the catheter, the catheter further comprises a third inflatable member disposed on one of a distal or a proximal portion of the catheter and a second stent disposed on the third inflatable member.

18. The method of claim 17 further comprising:

prior to removing the catheter from the side-branch vessel, positioning the catheter such that the third inflatable member is within the side-branch vessel at a location other than the ostium of the vessel;

inflating the third inflatable member to expand the second stent; and

deflating the third inflatable member.

19. The method of claim 17 further comprising using a therapeutic agent, the therapeutic agent operably disposed on the second stent.

20. The method of claim 17 wherein inflating the third inflatable member comprises expanding the third inflatable member into a generally cylindrical shape.