MEDICAL DEVICE FOR CROSSING AN OCCLUSION IN A VESSEL

• US 20090118644A1
• Filed: 11/02/2007
• Published: 05/07/2009
• Est. Priority Date: 11/02/2007
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: SKUJINS, PETER, REYNOLDS, BRIAN R.
• Granted Patent: US 7,841,994 B2
• 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 2025/09133 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 2025/09191 made of twisted wires
• CPC Class Codes: A61M 25/0009 Making of catheters or other medical or surgical tubes
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

The invention provides design, material, manufacturing method, and use alternatives for medical devices. An example medical device includes an elongated core member including an outer surface, an intermediate member disposed about at least a portion of the outer surface of the core member, and a coil disposed about at least a portion of the intermediate member in the distal region. At least a portion of an outer surface of the coil can include an undulating surface in a portion of the distal region.

Claims

1. A medical guidewire comprising:

an elongated core member including an outer surface;

an intermediate member disposed about at least a portion of the core member, the intermediate member including an outer surface, wherein the intermediate member is disposed at a first pitch about at least a portion of the core member; and

a coil member disposed about at least a portion of the outer surface of the intermediate member and at least a portion of the outer surface of the core member, at least a portion of the coil member including an undulating outer surface defined by the coil member tracking the outer surface of the intermediate member, wherein the coil member is disposed at a second pitch about at least a portion of the outer surface of the intermediate member and at least a portion of the outer surface of the core member, wherein the first pitch is relatively loose compared to the second pitch.

2. The medical guidewire of claim 1 wherein the undulating outer surface of the coil is further defined by the coil member tracking at least part of the outer surface of the core member.

3. The medical guidewire of claim 2 wherein the undulating outer surface of the coil includes one or more protruding portions and one or more recessed portions, the one or more protruding portions and the one or more recessed portions defining a threading structure.

4. The medical guidewire of claim 3 wherein the threading structure is helically disposed about the core member.

5. The medical guidewire of claim 1 wherein the intermediate member is a ribbon.

6. The medical guidewire of claim 5 wherein the ribbon is helically disposed about the core member.

7. The medical guidewire of claim 1 wherein the core member includes a rigid material.

8. The medical guidewire of claim 7 wherein the rigid material is stainless steel.

9. The medical guidewire of claim 1 wherein the intermediate member includes a material having deformation resistance.

10. The medical guidewire of claim 9 wherein the intermediate member includes a nickel-titanium alloy.

11. The medical guidewire of claim 1 wherein the core member includes a distal end, and wherein the intermediate member extends to or distal of the distal end.

12. The medical guidewire of claim 1 wherein the intermediate member is a multi-filar wire.

13. A medical guidewire comprising:

an elongated core member including a proximal region and a distal region, the elongate member having an outer surface;

a ribbon helically disposed about at least a portion of the outer surface of the core member, the ribbon disposed at a first pitch, the ribbon having an outer surface; and

a coil member disposed about at least a portion of the outer surface of the ribbon and at least a portion of the outer surface of the core member, at least a portion of the coil member including an undulating outer surface, wherein the undulating outer surface has a second pitch that corresponds to the first pitch.

14. The medical guidewire of claim 13 wherein the ribbon is helically disposed about the core member in at least a portion of the distal region.

16. The medical guidewire of claim 13 wherein the undulating outer surface of the coil is defined in part of the outer surface of the core member.

17. The medical guidewire of claim 16 wherein the coil tracks at least a portion of the ribbon and at least a portion of the core member to define the undulating outer surface.

18. The medical guidewire of claim 13 wherein the undulating outer surface of the coil includes one or more protruding portions and one or more recessed portions, the one or more protruding portions and the one or more recessed portions defining a threading.

19. The medical guidewire of claim 18 wherein the threading is helically shaped.

15. (canceled)

20. A medical guidewire comprising:

an elongated core member having a proximal region and a distal region, the core member including an outer surface, wherein the core member has a longitudinal axis, the core member being concentric with the longitudinal axis along the length of the core member in the distal region;

an intermediate member disposed about at least a portion of the core member, the intermediate member including an outer surface; and

a coil member disposed about at least a portion of the outer surface of the intermediate member and at least a portion of the outer surface of the core member, the coil member including an undulating outer surface.

21. The medical guidewire of claim 20 wherein the core member has a substantially non-undulating outer surface.

22. The medical guidewire of claim 20 wherein the undulating outer surface of the coil member is defined at least in part by the intermediate members.

23. The medical guidewire of claim 20 wherein the core member has one or more tapered portions in the distal region.

24. A method of making a medical guidewire, the method comprising:

providing an elongated core member;

disposing an intermediate member about a portion of the core member; and

disposing a coil member about at least a portion of the core member and about at least a portion of the intermediate member such that the coil includes one or more undulations defined at least in part by the intermediate member.

25. The method of claim 24 wherein the core member includes a distal region, and wherein the intermediate member is disposed about a portion of the distal region.

26. The method of claim 24 wherein disposing the coil includes winding the coil about the core member and/or intermediate member.

27. The method of claim 24 wherein the intermediate member is helically disposed about a portion of the core member.

28. A medical guidewire comprising:

an elongate core member including an outer surface;

a coil member disposed about at least a portion of the outer surface of the core member, the coil member including an outer surface; and

means for providing one or more undulations in the outer surface of the coil.

29. The medical guidewire of claim 28 wherein the one or more undulations are helical shaped.

30. The medical guidewire of claim 28 wherein the means for providing the one or more undulations is provided intermediate the outer surface of the core member and an inner surface of the coil member.