Temporary vascular filter guide wire

• US 20070123932A1
• Filed: 01/30/2007
• Published: 05/31/2007
• Est. Priority Date: 11/03/1997
• Status: Active Grant

• Current Assignee: William Gambale, William Gray
• Original Assignee: William Gambale, William Gray
• Inventors: Gray, William, Gambale, William
• Granted Patent: US 7,931,664 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/012 Multiple filtering units
• 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 2002/016 made from wire-like elements
• 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 2230/0021 square
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0086 Pyramidal, tetrahedral, or wedge-shaped
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2230/0097 Harpoon-shaped
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: Y10T 29/49604 Filter
• CPC Class Codes: Y10T 29/49801 Shaping fiber or fibered material

Abstract

A vascular filter guide wire including a collapsible filter that deploys radially in response to axial movement of a core wire relative to a shaft to trap particulate matter arising from treatment of a lesion.

Claims

1. A device for capturing embolic particles, comprising:

a core wire;

a shaft disposed coaxially about a length of the core wire; and

a filter operable between a collapsed configuration and an expanded configuration, a proximal end of the filter coupled to the shaft and a distal end of the filter coupled to the core wire.

2. The device according to claim 1, wherein the filter comprises a mesh.

3. The device according to claim 2, wherein the mesh includes a plurality of pores having a pore size in the range of approximately 50 microns to approximately 400 microns.

4. The device according to claim 2, wherein the mesh is formed from a metal.

5. The device according to claim 1, wherein the filter is a wire mesh.

6. The device according to claim 5, wherein the wire mesh includes a plurality of pores having a pore size in the range of approximately 50 microns to approximately 400 microns.

7. The device according to claim 5, wherein the wire mesh is approximately 0.001 inches thick.

8. The device according to claim 1, wherein the filter comprises a braid.

9. The device according to claim 8, wherein the braid comprises a plurality of metallic filaments.

10. The device according to claim 9, wherein the braid further comprises a plurality of polymeric filaments located on a distal portion of the braid.

11. The device according to claim 1, wherein the filter comprises a filtration cone.

12. The device according to claim 1, wherein the filter comprises an inner braid layer and an outer braid layer.

13. The device according to claim 12, wherein a fine filter mesh is interposed between the inner and outer braid layers along a distal portion of the filter.

14. The device according to claim 1, wherein the core wire comprises solid stainless steel.

15. The device according to claim 1, wherein the core wire includes a proximal end diameter of approximately 0.0075 inches, and the shaft includes an inner diameter of approximately 0.010 inches and an outer diameter of approximately 0.014 inches.

16. The device according to claim 1, including an actuating mechanism coupled to a proximal end of the core wire and a proximal end of the shaft, configured to displace the shaft relative to the core wire.

17. The vascular filter guide wire according to claim 1, wherein a distal end of the core wire includes a primary tapered portion.

18. The vascular filter guide wire according to claim 17, wherein the distal end of the core wire includes a secondary tapered portion distal of the primary tapered portion.

19. A filtration device, comprising:

a shaft disposed about a wire, a proximal end of the shaft and a proximal end of the wire coupled to an actuating mechanism, a distal end of the wire extending distal of a distal end of the shaft; and

a strainer, having a proximal end coupled to the distal end of the shaft and having a distal end coupled to the wire, relative displacement of the shaft with respect to the wire operating the strainer between a collapsed configuration and an expanded configuration, the strainer including a plurality of pores having a pore size in the range of approximately 50 microns to approximately 400 microns.

20. A filter system, comprising:

an elongated member having an outside diameter configured to permit passage of at least a distal end of the member through a lesion in a blood vessel, the elongated member including a generally tubular shaft disposed coaxially about a length of a core wire and a filter coupled at one end to the shaft and at another end to the core wire, the filter expandable from a collapsed configuration to an expanded configuration upon axial movement of the shaft relative to the core wire, the filter including a plurality of pores having a pore size in the range of approximately 50 microns to approximately 400 microns.