Medical devices

• US 20040133223A1
• Filed: 01/02/2003
• Published: 07/08/2004
• Est. Priority Date: 01/02/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Weber, Jan
• Granted Patent: US 7,494,497 B2
• Time in Patent Office: Days
• US Class Current: 606/159
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0058 X-shaped
• CPC Class Codes: A61M 2025/1004 Balloons with folds, e.g. folded or multifolded
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

Medical devices, such as medical balloons, catheters having balloons, and stents, having one or more cutting elements are disclosed. In some embodiments, the cutting elements include diamond.

Claims

1. A medical device, comprising:

an inflatable balloon;

a cutting element carried by the balloon; and

a deformable member disposed over a portion of the cutting element.

2. The device of claim 1, wherein the cutting element comprises diamond.

3. The device of claim 1, wherein the cutting element comprises a material having a hardness of greater than about 5,700 kg/mm², Knoops hardness.

4. The device of claim 1, wherein the cutting element has a cutting edge, and the resilient member extends over the cutting edge.

5. The device of claim 4, wherein the deformable member comprises a polymer.

6. The device of claim 5, wherein the polymer is a material selected from a group consisting of a silicone rubber and a urethane.

7. The device of claim 1, further comprising a second member between the cutting element and the balloon, the second member having a hardness greater than the hardness of the deformable member.

8. The device of claim 7, wherein the second member comprises a material selected from a group consisting of a polyimide and a polyamide.

9. The device of claim 1, comprising a plurality of cutting elements carried by the balloon.

10. The device of claim 1, comprising a plurality of cutting elements arranged collinearly and carried by the balloon.

11. The device of claim 1, comprising two adjacent cutting elements arranged overlapping relative to a longitudinal direction of the balloon.

12. The device of claim 1, wherein the cutting element has a cutting edge with a radius of curvature less than about 50 nanometers.

13. The device of claim 1, wherein the cutting element has a cutting edge with a radius of curvature less than about 20 nanometers.

14. The device of claim 1, wherein the cutting element has a cutting edge with a radius of curvature less than about 10 nanometers.

15. The device of claim 1, wherein the balloon is smaller than a 10 French balloon.

16. The device of claim 1, wherein the balloon is smaller than a 7 French balloon.

17. The device of claim 1, wherein the balloon is smaller than a 5 French balloon.

18. The device of claim 1, wherein the balloon is smaller than a 3 French balloon.

19. A medical device, comprising:

an inflatable balloon; and

a cutting element carried by the balloon, the cutting element having a hardness greater than about 5,700 kg/mm², Knoops hardness.

20. The device of claim 19, wherein the cutting element comprises diamond.

21. The device of claim 19, wherein the balloon is smaller than a 10 French balloon.

22. The device of claim 19, wherein the balloon is smaller than a 7 French balloon.

23. The device of claim 19, wherein the balloon is smaller than a 5 French balloon.

24. The device of claim 19, wherein the balloon is smaller than a 3 French balloon.

25. A medical device, comprising:

an inflatable balloon smaller than a 10 French balloon; and

a cutting element carried by the balloon.

26. The device of claim 25, wherein the cutting element comprises diamond.

27. The device of claim 25, wherein the balloon is smaller than a 7 French balloon.

28. The device of claim 25, wherein the balloon is smaller than a 5 French balloon.

29. The device of claim 25, wherein the balloon is smaller than a 3 French balloon.

30. A method of using a medical device, the method comprising:

providing the device having an inflatable balloon, a cutting element carried by the balloon, and a deformable member disposed over a portion of the cutting element; and

expanding the balloon, the cutting element piercing the deformable member.

31. The method of claim 30, wherein the cutting element has a cutting edge, and further comprising radially reducing the balloon, the deformable member covering the cutting edge.

32. The method of claim 30, wherein the cutting element pierces through the deformable member as the deformable member is contacted against a vessel wall.

33. A stent, comprising:

an expandable tubular member; and

a cutting element disposed on the tubular member.

34. The stent of claim 33, wherein the cutting element comprises diamond.

35. The stent of claim 33, wherein the cutting element comprises a material having a hardness greater than about 5,700 kg/mm², Knoops hardness.

36. The stent of claim 33, wherein the cutting element has a cutting edge with a radius of curvature of less than about 50 nanometers.

37. The stent of claim 33, wherein the cutting element has a cutting edge, and the stent further comprises a deformable member extending over the cutting edge.

38. The stent of claim 33, further comprising a polymeric layer over a portion of the tubular member.

39. The stent of claim 33, further comprising a drug-releasing layer over a portion of the tubular member.

40. The stent of claim 33, comprising a plurality of cutting elements disposed on the tubular member.

41. The stent of claim 33, wherein the tubular member is balloon-expandable.

42. The stent of claim 33, wherein the tubular member is self-expandable.