Cutting balloon catheter and method for blade mounting

• US 20050228343A1
• Filed: 04/08/2004
• Published: 10/13/2005
• Est. Priority Date: 04/08/2004
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Kelley, Gregory S.
• Granted Patent: US 7,754,047 B2
• Time in Patent Office: Days
• US Class Current: 604/96.10
• 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: A61B 2017/22065 Functions of balloons dilating A61M29/02
• CPC Class Codes: A61B 2017/320741 for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy
• CPC Class Codes: A61M 25/1027 Making of balloon catheters
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A cutting balloon catheter and methods for making and using the same. The cutting balloon catheter may include a catheter shaft having a balloon coupled thereto. One or more cutting members or blades may be coupled to the balloon. Manufacturing the cutting balloon catheter may include partially submerging or embedding a cutting member within a joining member and attaching the joining member to a balloon. The cutting member may include one or more slots along its base that can interlock with the joining member.

Claims

1. A method for manufacturing a cutting balloon catheter, comprising the steps of:

providing a strip of polymeric material;

providing a cutting member, the cutting member including a top cutting portion and a slotted base portion having a plurality of slots;

liquefying at least a portion of the strip;

disposing the cutting member adjacent the strip and allowing the liquefied portion of the strip to flow into the slots; and

attaching the strip to a balloon.

2. The method of claim 1, wherein the step of liquefying at least a portion of the strip includes heating the strip.

3. The method of claim 2, wherein heating the strip includes heating the strip with a laser.

4. The method of claim 1, wherein the step of liquefying at least a portion of the strip includes melting the strip.

5. The method of claim 1, wherein the step of liquefying at least a portion of the strip includes liquefying the strip with a solvent.

6. The method of claim 5, further comprising the step of removing the solvent.

7. The method of claim 1, wherein the step of disposing the cutting member adjacent the strip and allowing the liquefied portion of the strip to flow into the slots includes submerging the cutting member in the strip.

8. The method of claim 7, wherein the step of submerging the cutting member in the strip includes submerging the slots of the cutting member in the strip.

9. The method of claim 7, wherein the step of submerging the slots of the cutting member in the strip interlocks the strip with the cutting member.

10. The method of claim 1, wherein the step of attaching the strip to a balloon includes heating the strip.

11. The method of claim 1, wherein the step of attaching the strip to a balloon includes at least partially solvating the strip with a solvent.

12. The method of claim 11, further comprising the step of removing the solvent.

13. The method of claim 1, further comprising the step of cooling the liquefied portion of the strip.

14. The method of claim 1, further comprising the step of disposing a second cutting member adjacent the strip.

15. The method of claim 1, wherein the step of disposing the cutting member adjacent the strip and allowing the liquefied portion of the strip to flow into the slots precedes the step of attaching the strip to a balloon.

16. The method of claim 1, wherein the step of disposing the cutting member adjacent the strip and allowing the liquefied portion of the strip to flow into the slots follows the step of attaching the strip to a balloon.

17. A method for manufacturing a cutting balloon catheter, comprising the steps of:

providing a joining member;

providing a cutting blade, the cutting blade having a cutting surface and an interlocking surface;

softening the joining member;

positioning the cutting blade adjacent the joining member so that the interlocking surface is submerged within the joining member;

solidifying the joining member so that the cutting blade and the joining member are secured to one another; and

attaching the joining member and the cutting blade to an angioplasty balloon.

18. The method of claim 17, wherein the step of softening the joining member includes heating the strip.

19. The method of claim 18, wherein heating the joining member includes heating the joining member with a laser.

20. The method of claim 18, wherein heating the joining member includes melting the joining member.

21. The method of claim 17, wherein the step of softening the joining member includes at least partially solvating the joining member with a solvent.

22. The method of claim 17, wherein the step of attaching the joining member and the cutting blade to an angioplasty balloon includes heating the joining member.

23. The method of claim 22, wherein heating includes heating the joining member with a laser.

24. The method of claim 17, wherein the step of attaching the joining member and the cutting blade to an angioplasty balloon includes at least partially solvating the joining member with a solvent.

25. The method of claim 17, further comprising the step of disposing a second cutting blade adjacent the joining member.

26. A cutting balloon catheter, comprising:

an elongate catheter shaft;

a balloon coupled to the catheter shaft;

a polymeric joining member attached to the balloon; and

a cutting members coupled to the joining member, the cutting member including a cutting surface and a slotted base, the slotted base being submerged within the joining member.