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

• US 7,105,015 B2
• Filed: 06/17/2003
• Issued: 09/12/2006
• Est. Priority Date: 06/17/2003
• Status: Expired due to Term

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Goshgarian, Justin
• Primary Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US10/464,716
• Publication Number:
  US 20040260378A1
• Time in Patent Office: 1,183 Days
• Field of Search: 623 11- 115, 623/1.23, 623/1.35, 60410101-1015
• 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 includes 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 and inflatable to become generally cylindrical;

a stent disposed on the first inflatable member, the stent having a body portion and an end portion; and

a conformable second inflatable member disposed on a proximal portion of the catheter and inflatable to become generally spherical, the second inflatable member spaced apart from the first inflatable member such that at least a portion of the first inflatable member is distal to the stent and inflatable to conform a body portion of the stent to a branch vessel when the second inflatable member is in position to be inflated to expand the end portion of the stent into a flared configuration to conform the end portion of the stent to an ostium of a 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 includes a contractile member to aid in returning the first inflatable member to an uninflated configuration upon deflation.

4. The system of claim 1 wherein the body portion and the end portion have different material properties.

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

6. 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.

7. The method of claim 6 further comprising using a single guide wire.

8. The method of claim 6 further comprising using a therapeutic agent, the therapeutic agent operably disposed on the stent.

9. The method of claim 6 further comprising using at least one radiopaque marker, the radiopaque marker operably disposed on the catheter.

10. The method of claim 6 wherein inflating the first inflatable member comprises expanding the first inflatable member into a generally cylindrical shape.

11. The method of claim 6 wherein inflating the second inflatable member comprises expanding the second inflatable member into a generally spherical shape.

12. The method of claim 6 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.

13. The method of claim 6 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.

14. The method of claim 13 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.

15. The method of claim 13 further comprising using a therapeutic agent, the therapeutic agent operably disposed on the second stent.

16. The method of claim 13 wherein inflating the third inflatable member comprises expanding the third inflatable member into a generally cylindrical shape.