Crossing guidewire

• US 8,551,020 B2
• Filed: 09/13/2007
• Issued: 10/08/2013
• Est. Priority Date: 09/13/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Chen, Hancun, Lin, Horng-Ban, Zhou, Pu
• Primary Examiner(s): DOUGHERTY, SEAN PATRICK
• Application Number:
  US11/854,954
• Publication Number:
  US 20080064989A1
• Time in Patent Office: 2,217 Days
• Field of Search: 600/434, 600/435, 600/585
• US Class Current: 600/585
• CPC Class Codes: A61M 2025/09091 where a sheath surrounds the coil at the distal part
• 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 25/09 Guide wires

Abstract

Medical devices and methods for manufacturing and using medical devices. An example medical device includes a core member, a tubular member coupled to the core member, and a tip member coupled to the tubular member. The tubular member may have a plurality of slots formed therein. The tip member may include a polymeric material. An intermediate member may be disposed between the tubular member and the core member that aids the bonding of the tip member thereto.

Claims

1. A medical device, comprising:

an elongate core member, the core member having an outer surface, a central axis, and a solid cross-section from the outer surface to the central axis;

a tubular member disposed over a portion of the core member and bonded to the core member for permanent attachment of the tubular member to the core wire as provided for use in a medical procedure, the tubular member having a distal end;

wherein a plurality of slots are formed in the tubular member;

a polymeric tip member extending distally away from the distal end of the tubular member and including a proximal portion; and

an intermediate member disposed within the tubular member, wherein a portion of the intermediate member extends distally away from the distal end of the tubular member and overlaps with the proximal portion of the tip member.

2. The medical device of claim 1, wherein the intermediate member includes a coil.

3. The medical device of claim 1, wherein the intermediate member includes a portion of the tubular member.

4. The medical device of claim 1, wherein the intermediate member includes a second tubular member.

5. The medical device of claim 1, wherein the intermediate member includes a polymeric insert.

6. A medical device, comprising:

an elongate core member, the core member having a solid cross-section and being free of a lumen formed therein;

a tubular member disposed over a portion of the core member and bonded to the core member for permanent attachment of the tubular member to the core member as provided for use in a medical procedure, wherein a plurality of slots are formed in the tubular member;

wherein the tubular member includes a first section having a first outer diameter and a second section having a second outer diameter that is smaller than the first outer diameter;

wherein the first section of the tubular member is disposed proximally of the second section of the tubular member; and

a tip member coupled to the tubular member.

7. The medical device of claim 6, wherein the first section and the second section of the tubular member are formed from a single monolith of material.

8. The medical device of claim 6, wherein the tubular member includes a tapered section disposed between the first section and the second section that forms a smooth transition between the first outer diameter and the second outer diameter.

9. The medical device of claim 6, wherein the first section and the second section of the tubular member are formed from separate tubes that are attached to each other.

10. The medical device of claim 6, wherein a first section and the second section abut.

12. The medical device of claim 6, wherein the tip member includes a polymer.

13. The medical device of claim 12, wherein a portion of the tip member is disposed along an outer surface of the tubular member.

14. The medical device of claim 12, wherein a portion of the tip member is disposed along an outer surface of the second section of the tubular member.

11. A medical device, comprising:

an elongate core member, the core member having a longitudinal axis, an outer surface, and a central axis;

wherein in a plane transverse to the longitudinal axis the core member is solid from the outer surface to the central axis;

a tubular member disposed over a portion of the core member and bonded to the core member for permanent attachment of the tubular member to the core member as provided for use in a medical procedure, wherein a plurality of slots are formed in the tubular member;

wherein the tubular member includes a first section having a first outer diameter and a second section having a second outer diameter that is smaller than the first outer diameter;

a tip member coupled to the tubular member; and

wherein the first section and the second section overlap.

15. A guidewire, comprising:

an elongate non-tubular core wire, the core wire having a solid cross-section;

a tubular member disposed over a portion of the core wire and bonded to the core wire for permanent attachment of the tubular member to the core wire as provided for use in a medical procedure, the tubular member having a distal end;

wherein a plurality of slots are formed in the tubular member;

a tip member coupled to the distal end of the tubular member;

an intermediate member having a first portion disposed within the tubular member and a second portion overlapping with the tip member; and

wherein the intermediate member includes a portion of the tubular member.

16. A guidewire, comprising:

an elongate non-tubular core wire, the core wire having a solid cross-section;

a tubular member disposed over a portion of the core wire and bonded to the core wire for permanent attachment of the tubular member to the core wire as provided for use in a medical procedure, the tubular member having a distal end;

wherein a plurality of slots are formed in the tubular member;

a tip member coupled to the distal end of the tubular member;

an intermediate member having a first portion disposed within the tubular member and a second portion overlapping with the tip member; and

wherein the intermediate member includes a polymeric insert.

17. A guidewire, comprising:

an elongate non-tubular core wire, the core wire having a solid cross-section;

a tubular member disposed over a portion of the core wire and bonded to the core wire for permanent attachment of the tubular member to the core wire as provided for use in a medical procedure, the tubular member having a distal end;

wherein a plurality of slots are formed in the tubular member;

a tip member coupled to the distal end of the tubular member;

an intermediate member having a first portion disposed within the tubular member and a second portion overlapping with the tip member; and

wherein the tip member includes a polymer, a metal, or both a polymer and a metal.

18. A method for manufacturing a medical device, the method comprising the steps of:

providing an elongate core member, the core member having a solid cross-section and being free of a lumen formed therein;

disposing a tubular member over a portion of the core member, wherein a plurality of slots are formed in the tubular member, wherein the tubular member includes a first section having a first outer diameter and a second section having a second outer diameter that is smaller than the first outer diameter, wherein the first section of the tubular member is disposed proximally of the second section of the tubular member;

bonding the tubular member to the core member for permanent attachment of the tubular member to the core member for use in a medical procedure; and

coupling a tip member to the tubular member.