DEFLATABLE BIFURCATED DEVICE

• US 20100114019A1
• Filed: 06/05/2009
• Published: 05/06/2010
• Est. Priority Date: 06/05/2008
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: HOFF, STEVE, HOLMAN, THOMAS, DUNN, RICHARD
• Granted Patent: US 8,827,954 B2
• Time in Patent Office: Days
• US Class Current: 604/101.10
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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 2250/0029 differing in bending or flexure capacity
• CPC Class Codes: A61M 2025/1045 for treating bifurcations, e.g. balloons in y-configuration, separate balloons or special features of the catheter for treating bifurcations
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: Y10T 29/49716 Converting

Abstract

A medical device for insertion and expansion within a bifurcated lumen is described. An expansion region of the device has regions thereon which, in some cases, enable the device to fold into a predetermined configuration upon deflation. The regions may be defined by differing modulus of the device material.

Claims

1. A medical device for treating a bifurcated vessel, the medical device comprising:

a catheter shaft having a proximal region, a distal region, and a longitudinal axis;

a main balloon disposed about the distal region of the catheter shaft along the longitudinal axis; and

a secondary balloon coupled to the distal region of the catheter shaft and disposed offset from the longitudinal axis, the secondary balloon having an inflatable portion including a first section and a second section, the first section being more flexible than the second section.

2. The medical device of claim 1 wherein when the inflatable portion of the secondary balloon is expanded, the expansion is greater in a direction perpendicular to the longitudinal axis than a direction parallel to the longitudinal axis.

3. The medical device of claim 1 wherein the first section and the second section form a pattern.

4. The medical device of claim 3 wherein the pattern is a pattern of stripes parallel to the longitudinal axis of the catheter shaft.

5. The medical device of claim 3 wherein the pattern is a pattern of stripes at an angle to the longitudinal axis of the catheter shaft.

6. The medical device of claim 1 wherein the first section and second section cause the balloon to collapse into pleats.

7. The medical device of claim 1 wherein the first section is an ablation region.

8. The medical device of claim 1 wherein the second section has higher crystallinity than the first section.

9. The medical device of claim 1 wherein the second section comprises raised nodules of a polymer.

10. A method of forming a medical device for treating a bifurcated lumen, the method comprising:

providing a balloon system disposed about a distal region of a catheter shaft, the balloon system including a first inflatable portion along a longitudinal axis of the catheter shaft and a second inflatable portion offset from the longitudinal axis of the catheter shaft; and

modifying a region of the second inflatable portion of the balloon system to form a first section and a second section in the second inflatable portion having varying crystallinity and/or thickness, wherein the first section is more flexible than the second section.

11. The method of claim 10 wherein the modifying includes directing radiation at the region of the second inflatable portion.

12. The method of claim 11 wherein directing radiation includes directing radiation that has a fluence below an ablation threshold to form the second section.

13. The method of claim 11 wherein directing radiation includes directing radiation that has a fluence above an ablation threshold to form the first section.

14. The method of claim 10 wherein the first section and the second section form a striped pattern.

15. The method of claim 10 wherein the first section and second section cause the second inflatable portion to be collapsible into pleats.

16. The method of claim 10 wherein the second inflatable portion includes a polymer and the first section is an ablation region.

17. The method of claim 10 wherein the second inflatable portion includes a polymer and the second section has higher crystallinity than the first section.

18. A medical device for treating a bifurcated vessel, the medical device comprising:

a catheter shaft having a proximal region and a distal region;

a first balloon disposed about the distal region of the catheter shaft; and

a second balloon coupled to the distal region of the catheter shaft, the second balloon including a first section and a second section forming a pattern, the first section being more flexible than the second section;

wherein the first section and the second section cause the balloon to collapse into a predetermined configuration having one or more pleats.

19. The medical device of claim 18 wherein the first section is an ablation region.

20. The medical device of claim 18 wherein the second section has higher crystallinity than the first section.