Distal protection guidewire with nitinol core

• US 20040116831A1
• Filed: 12/13/2002
• Published: 06/17/2004
• Est. Priority Date: 12/13/2002
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Vrba, Anthony C.
• Application Number:
  US10/318,907
• Publication Number:
  US 20040116831A1
• Time in Patent Office: Days
• US Class Current: 600/585
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/015 Stop means therefor
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61M 2025/09075 having a core without a coil possibly combined with a sheath
• CPC Class Codes: A61M 2025/09141 made of shape memory alloys which take a particular shape at a certain temperature
• CPC Class Codes: A61M 2025/0915 having features for changing the stiffness
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

A guidewire having a proximal section, a distal section, and a transition section is disclosed. In one exemplary embodiment of the present invention, the proximal section may be formed of a relatively stiff, inelastic material, whereas the distal section may be formed of a relatively flexible, elastic material having super-elastic properties. A coupling member may be placed adjacent to the transition section to secure the proximal and distal sections together.

Claims

1. A guidewire, comprising:

an elongate shaft including a proximal section, a distal section, and a transition section, the proximal section comprising a first material, the distal section comprising a second material different from the first material;

a coupling member attached adjacent to the transition section, said coupling member configured to secure the proximal section to the distal section; and

an embolic protection filter disposed on the shaft.

2. The guidewire of claim 1, wherein the proximal section is comprised of stainless steel.

3. The guidewire of claim 1, wherein the distal section is comprised of a super-elastic material.

4. The guidewire of claim 1, wherein the distal section is comprised of a linear-elastic material.

5. The guidewire of claim 1, wherein the distal section is comprised of nickel-titanium alloy.

6. The guidewire of claim 1, wherein the transition section forms a joint between the proximal and distal sections.

7. The guidewire of claim 6, wherein said joint is a butt joint.

8. The guidewire of claim 6, wherein said joint is a lap joint.

9. The guidewire of claim 1, wherein the transition section includes a necked-down portion.

10. The guidewire of claim 1, wherein the coupling member comprises a tubular member.

11. The guidewire of claim 1, wherein the coupling member comprises a nickel-chromium-molybdenum alloy tube.

12. The guidewire of claim 1, wherein the coupling member comprises a polymeric member heat shrunk adjacent to the transition section.

13. The guidewire of claim 1, further comprising a wire coil disposed about a portion of said distal section.

14. The guidewire of claim 13, wherein said wire coil is formed from a single continuous strand of wire helically disposed about a portion of said distal section.

15. The guidewire of claim 13, wherein said wire coil comprises a radiopaque material.

16. The guidewire of claim 1, further comprising a coil tip.

17. The guidewire of claim 16, wherein said coil tip includes a hydrophilic coating.

18. The guidewire of claim 1, further comprising a safety ribbon.

19. The guidewire of claim 1, further comprising a distal stop disposed about a portion of said distal section.

20. A guidewire, comprising:

an elongate shaft including a proximal section formed of a relatively stiff, elastic material, a distal section formed of a relatively flexible, elastic material, and a transition section forming a joint between the proximal and distal sections;

a coupling member attached adjacent to the transition section; and

an embolic protection filter disposed on the shaft.

21. The guidewire of claim 20, wherein the proximal section is comprised of stainless steel.

22. The guidewire of claim 20, wherein the distal section is comprised of a super-elastic material.

23. The guidewire of claim 20, wherein the distal section is comprised of a linear-elastic material.

24. The guidewire of claim 20, wherein the distal section is comprised of nickel-titanium alloy.

25. The guidewire of claim 20, wherein said joint is a butt joint.

26. The guidewire of claim 20, wherein said joint is a lap joint.

27. The guidewire of claim 20, wherein the transition section includes a necked-down portion.

28. The guidewire of claim 20, wherein the coupling member comprises a tubular member.

29. The guidewire of claim 20, wherein the coupling member comprises a nickel-chromium-molybdenum alloy tube.

30. The guidewire of claim 20, wherein the coupling member comprises a polymeric member heat shrunk adjacent to the transition section.

31. The guidewire of claim 20, further comprising a wire coil disposed about a portion of said distal section.

32. The guidewire of claim 31, wherein said wire coil is formed from a single continuous strand of wire helically disposed about a portion of said distal section.

33. The guidewire of claim 31, wherein said wire coil comprises a radiopaque material.

34. The guidewire of claim 20, further comprising a coil tip.

35. The guidewire of claim 34, wherein said coil tip includes a hydrophilic coating.

36. The guidewire of claim 20, further comprising a safety ribbon.

37. The guidewire of claim 20, further comprising a distal stop disposed about a portion of said distal section.