Intravascular guide wire and method for manufacture thereof

• US 20050119590A1
• Filed: 12/17/2004
• Published: 06/02/2005
• Est. Priority Date: 06/18/1991
• Status: Abandoned Application

• Current Assignee: Paul H. Burmeister, Paul Slaikeu, Richard E. Cappetta, Steven S. Hackett
• Original Assignee: Paul H. Burmeister, Paul Slaikeu, Richard E. Cappetta, Steven S. Hackett
• Inventors: Hackett, Steven S., Burmeister, Paul H., Slaikeu, Paul, Cappetta, Richard E.
• Application Number:
  US11/016,251
• Publication Number:
  US 20050119590A1
• Time in Patent Office: Days
• US Class Current: 600/585
• CPC Class Codes: A61M 2025/09083 having a coil around a core
• CPC Class Codes: A61M 2025/09091 where a sheath surrounds the coil at the distal part
• CPC Class Codes: A61M 2025/09133 having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque
• CPC Class Codes: A61M 2025/09175 having specific characteristics at the distal tip
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A guide wire, and a method for the manufacture thereof, having a core and a plastic jacket enclosing the core. The plastic jacket comprises a proximal portion formed of a first plastic material and a distal jacket portion formed of a second plastic material. The distal end of the proximal jacket portion and the proximal end of the distal jacket portion substantially abut each other and are of substantially equal outer diameters so as to form a smooth transition between the proximal and the distal jacket portions. According to another aspect, there is provided a guide wire with a selectively formable metallic core and a plastic jacket encasing the formable core. The plastic jacket has a distal portion with a hydrophilic coating and a proximal portion without a hydrophilic coating. According to another aspect, there is provided a guide wire having a formable metallic core and a plastic jacket encasing the formable core. The plastic jacket has a distal portion that is more radiopaque than a proximal portion.

Claims

1. A guidewire comprising:

an elongate core having a proximal region and a distal region, the distal region of the core having a proximal portion and a distal portion, the distal portion including a distal end, the distal portion comprising a flat ribbon;

an atraumatic tip positioned at the distal end of the elongate core;

a coil disposed over the distal portion of the core, the coil having a distal end positioned proximate the atraumatic tip, the coil extending proximally over the distal region of the elongate core.

2. The guidewire of claim 1, wherein the flat ribbon has a relatively flat cross-sectional shape.

3. The guidewire of claim 1, wherein the proximal portion of the core has a relatively round cross-sectional shape.

4. The guidewire of claim 1, wherein the distal region of the elongate core has a distally tapering diameter.

5. The guidewire of claim 1, wherein the proximal region of the elongate core includes a portion having a fluoroelastomer coating or jacket.

6. The guidewire of claim 1, wherein the proximal region of the elongate core includes a portion having a polytetrafluoroethylene coating or jacket.

7. The guidewire of claim 1, wherein the proximal region of the elongate core comprises stainless steel.

8. The guidewire of claim 1, wherein the elongate core comprises stainless steel.

9. The guidewire of claim 1, further comprising an outer sheath disposed over a portion of the distal region of the elongate core.

10. The guidewire of claim 1, wherein the coil comprises stainless steel.

11. The guidewire of claim 1, wherein the coil comprises platinum.

12. A method of manufacturing a guidewire, comprising steps of:

providing an elongate core having a proximal region and a distal region, the distal region of the core having a proximal portion and a distal portion, the distal portion including a distal end, the distal portion comprising a flat ribbon;

positioning an atraumatic tip at the distal end of the elongate core; and

disposing a coil over the distal portion of the core, the coil having a distal end positioned proximate the atraumatic tip, the coil extending proximally over the distal region of the elongate core.

13. The method of claim 12, further comprising providing a portion of the proximal region of the elongate core with a fluoroelastomer coating or jacket.

14. The method of claim 13, wherein the fluoroelastomer jacket or coating comprises a polytetrafluoroethylene coating or jacket.

15. The method of claim 13, wherein providing a fluoroelastomer coating or jacket comprises heat-shrinking a fluoroelastomer sheath over the elongate core.

16. The method of claim 13, wherein providing a fluoroelastomer coating or jacket comprises spraying or dipping the elongate core to form a fluoroelastomer coating.

17. The method of claim 12, wherein providing an elongate core comprises providing an elongate core with the proximal region of the elongate core comprising stainless steel.

18. The method of claim 12, wherein providing an elongate core comprises providing an elongate core comprising stainless steel.

19. The method of claim 12, wherein the coil comprises stainless steel.

20. The method of claim 12, wherein the coil comprises platinum.