Distal protection guidewire with nitinol core
View Patent ↗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.
1. A guidewire, comprising:
an elongate shaft including a proximal section having a distal end, a distal section having a proximal end, and a transition section, the proximal section comprising a first material, the distal section comprising a second material different from the first material, the transition section includes the distal end of the proximal section abutting the proximal end of the distal section;
a coupling member attached adjacent to the transition section, said coupling member configured to secure the proximal section to the distal section; and
further comprising a distal stop disposed about a portion of said distal section.
2. The guidewire of claim 1 , further comprising an embolic protection filter disposed on the shaft.
3. The guidewire of claim 1 , wherein the proximal section is comprised of stainless steel.
4. The guidewire of claim 1 , wherein the distal section is comprised of nickel-titanium alloy.
5. The guidewire of claim 1 , wherein the distal section is comprised of a super-elastic material.
6. The guidewire of claim 1 , wherein the distal section is comprised of a linear-elastic material.
7. The guidewire of claim 1 , wherein the transition section includes a joint between the proximal and distal sections.
8. The guidewire of claim 7 , wherein said joint is a butt joint.
9. The guidewire of claim 7 , wherein said joint is a lap joint.
10. The guidewire of claim 1 , wherein the transition section includes a necked-down portion.
11. The guidewire of claim 1 , wherein the coupling member includes a tubular member.
12. The guidewire of claim 1 , wherein the coupling member includes 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 comprises a radiopaque material.
15. 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, the transition section including a necked-down portion;
a coupling member attached adjacent to the transition section, said coupling member configured to secure the proximal section to the distal section, and further comprising a distal stop disposed about a portion of said distal section.
16. The guidewire of claim 15 further comprising an embolic protection filter disposed on the shaft.
17. The guidewire of claim 15 , wherein the proximal section is comprised of stainless steel.
18. The guidewire of claim 15 , wherein the distal section is comprised of nickel-titanium alloy.
19. The guidewire of claim 15 , wherein the transition section includes a joint between the proximal and distal sections.
20. The guidewire of claim 15 , wherein the coupling member includes a tubular member.
21. The guidewire of claim 15 , wherein the coupling member includes a polymeric member heat shrunk adjacent to the transition section.
22. The guidewire of claim 15 , further comprising a wire coil disposed about a portion of said distal section.
23. The guidewire of claim 22 , wherein said wire coil comprises a radiopaque material.
24. 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 including a necked-down portion forming a joint between the proximal and distal sections;
a coupling member attached adjacent to the transition section;
an embolic protection filter disposed on the shaft; and
further comprising a distal stop disposed about a portion of said distal section.