Balloon anchoring system

• US 20030032973A1
• Filed: 08/10/2001
• Published: 02/13/2003
• Est. Priority Date: 08/10/2001
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: LaViolette, Paul, Jenusaitis, Matthew
• Granted Patent: US 6,562,062 B2
• Time in Patent Office: Days
• US Class Current: 606/192
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/22061 for spreading elements apart
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 25/1027 Making of balloon catheters
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A system for anchoring an angioplasty catheter to a stenosis in the vasculature of a patient includes an elongated inflatable balloon that can be selectively moved between a deflated configuration and an inflated configuration. Optionally, the system can include a stent mounted on the balloon. The balloon defines an axis and has at least one elongated blade which is axially oriented on the surface of the balloon. Also this blade is conformed with at least one azimuthally oriented grip. When the balloon is moved into its inflated configuration, to thereby embed the blade and its grip into the stenosis and expand the stent for emplacement in the vasculature, the axially oriented blade prevents an azimuthal movement of the balloon and the azimuthally oriented grip prevents an axial movement of the balloon relative to the stenosis.

Claims

1. A system for anchoring an angioplasty catheter to a stenosis in the vasculature of a patient which comprises:

an elongated inflatable balloon having a surface and defining a longitudinal axis, said balloon being mounted on said catheter for selective movement between a deflated configuration wherein said surface of said balloon is collapsed on said axis, and an inflated configuration wherein said surface is radially distanced from said axis;

at least one elongated blade mounted on said surface of said balloon substantially parallel to said axis of said balloon;

at least one grip conformed with said blade, said grip being oriented to protrude in a substantially radial direction from said axis; and

a means for inflating said balloon into said inflated configuration to embed said blade and said grip into said stenosis to anchor said balloon thereto by respectively preventing azimuthal and axial movements of said balloon relative to said stenosis.

2. A system as recited in claim 1 further comprising a stent positioned on said balloon for movement therewith from said deflated configuration into said inflated configuration to expand said stent for emplacement in the vasculature of the patient.

3. A system as recited in claim 2 further comprising a plurality of said blades, with each said blade axially aligned with at least one other said blade, and with a distance therebetween for positioning said stent therebetween on said balloon.

4. A system as recited in claim 1 wherein said grip is a serration formed on said blade.

5. A system as recited in claim 1 wherein said grip is a cross-blade and wherein said cross-blade forms an angle a with said blade.

6. A system as recited in claim 5 wherein said angle a is ninety degrees.

7. A system as recited in claim 5 wherein said angle a is greater than ninety degrees.

8. A system as recited in claim 1 wherein said blade and said grip are made of stainless steel.

9. A system as recited in claim 1 wherein there are a plurality of said blades, and further wherein each said blade has a plurality of conformed grips.

10. A system as recited in claim 1 wherein a plurality of said blades are axially aligned with each other.

11. A system as recited in claim 1 wherein there are a plurality of said blades, and further wherein each said blade is azimuthally distanced from at least one other said blade by an angle β

.

12. A blade for anchoring an angioplasty balloon to a stenosis in the vasculature of a patient during an emplacement of a stent, wherein the balloon is elongated to define an axis and said blade comprises:

a base member;

an elongated main-blade mounted on said base member;

a grip conformed with said main-blade; and

a means for attaching said base member to a surface of the balloon to axially orient said main-blade substantially parallel to the axis of the balloon to prevent azimuthal movement of the balloon when said blade is embedded into the stenosis, and to azimuthally orient said grip to protrude radially from the axis to prevent axial movement of the balloon when said blade is embedded into the stenosis.

13. A blade as recited in claim 12 further comprising a means for inflating the balloon for selective movement between a deflated configuration wherein the surface of the balloon is collapsed onto the axis, and an inflated configuration wherein the surface is radially distanced from the axis to embed said blade into the stenosis.

14. A blade as recited in claim 13 wherein said stent is positioned on said balloon for movement therewith from said deflated configuration into said inflated configuration to expand said stent for emplacement in the vasculature of the patient.

15. A blade as recited in claim 14 further comprising a plurality of said blades, with each said blade axially aligned with at least one other said blade, and with a distance therebetween for positioning said stent therebetween on said balloon.

16. A blade as recited in claim 12 wherein said grip is a serration formed on said main-blade.

17. A blade as recited in claim 16 wherein said grip is a cross-blade and wherein said cross-blade forms an angle a with said main-blade.

18. A blade as recited in claim 17 wherein said angle α

is ninety degrees.

19. A blade as recited in claim 12 wherein there are a plurality of said main-blades, and further wherein each said main-blade has a plurality of conformed grips.

20. A blade as recited in claim 19 wherein a plurality of said main-blades are axially aligned with each other.

21. A blade as recited in claim 12 wherein there are a plurality of said main-blades, and further wherein each said main-blade is azimuthally distanced from at least one other said main-blade by an angle β

.

22. A method for anchoring an angioplasty catheter to a stenosis in the vasculature of a patient which comprises the steps of:

providing an elongated inflatable balloon having a surface and defining a longitudinal axis, said balloon being mounted on said catheter for selective movement between a deflated configuration wherein said surface of said balloon is collapsed on said axis, and an inflated configuration wherein said surface is radially distanced from said axis, with at least one elongated blade mounted on said surface of said balloon substantially parallel to said axis of said balloon, and at least one grip conformed with said blade, said grip being oriented to protrude in a substantially radial direction from said axis;

inserting said balloon to the site of the stenosis in the vasculature; and

inflating said balloon into said inflated configuration to embed said blade and said grip into said stenosis to anchor said balloon thereto by respectively preventing azimuthal and axial movements of said balloon relative to said stenosis.

23. A method as recited in claim 22 further comprising the step of mounting a stent on said balloon for movement therewith from said deflated configuration to said inflated configuration for emplacement of said stent into the vasculature of the patient.

24. A method as recited in claim 22 wherein said grip is a serration formed on said blade.

25. A method as recited in claim 22 wherein said grip is a cross-blade and wherein said cross-blade forms an angle α

with said blade.