Temporary vascular filter guide wire

• US 20070126161A1
• Filed: 01/30/2007
• Published: 06/07/2007
• Est. Priority Date: 11/03/1997
• Status: Active Grant

• Current Assignee: Richard Gambale, William Gray
• Original Assignee: Richard Gambale, William Gray
• Inventors: Gray, William, Gambale, Richard
• Granted Patent: US 7,996,993 B2
• Time in Patent Office: Days
• US Class Current: 264/628
• 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 method of making a filter, comprising:

providing a mandrel;

positioning a filter form on the mandrel, the filter form including a dissolvable compound;

disposing a filter basket over the filter form;

dissolving the filter form; and

removing the mandrel from the filter basket.

2. The method according to claim 1, further comprising the step of forming a plurality of spaced apart crimps in the mandrel and positioning a filter form over each of the crimps.

3. The method according to claim 2, wherein the forming step includes spacing the crimps from one another in the range of approximately 2 inches to approximately 3 inches.

4. The method according to claim 2, wherein the filter forms include a dual cone-shaped configuration having a proximal cone and a distal cone, the proximal cone base adjacent to the distal cone base.

5. The method according to claim 2, wherein positioning step includes placing a filter mold over each of the crimps, filling the filter molds with the dissolvable compound, curing the compound, and removing the filter molds from the mandrel, leaving a plurality of spaced apart filter forms.

6. The method according to claim 2, wherein the disposing step comprises braiding an inner braid layer over the filter forms and bonding the inner braid layer.

7. The method according to claim 6, wherein the bonding step includes forming a first joint between each of the filter forms.

8. The method according to claim 7, wherein the first joint comprises a curable epoxy.

9. The method according to claim 7, further comprising severing the first joints and installing a filter mesh over at least a portion of each of the filter forms.

10. The method according to claim 9, further comprising reconnecting the severed first joints.

11. The method according to claim 10, wherein the reconnecting step includes splicing a section of heat shrink tubing over the first joints.

12. The method according to claim 10, further comprising braiding an outer braid layer over the inner braid layer and filter meshes to form a plurality of filter baskets.

13. The method according to claim 12, further comprising bonding the outer braid layer by forming a second joint over the first joint and cutting the mandrel at the second joint.

14. The method according to claim 1, wherein the disposing step comprises braiding an inner braid layer over the filter form, installing a filter mesh over at least a portion of the filter form, and braiding an outer braid layer over the inner braid layer and filter mesh to form the filter basket.

15. The method according to claim 14, wherein the filter form includes a dual cone configuration having a proximal cone and a distal cone, a proximal cone base adjacent to a distal cone base, the installing step including disposing the filter mesh over at least a portion of the distal cone.

16. The method according to claim 15, further comprising bonding a sleeve to an end of the filter basket adjacent to the distal cone following the removing step.

17. The method according to claim 1, wherein the disposing step comprises braiding a braid layer, including polymeric and metallic filaments, over the filter form.

18. The method according to claim 17, wherein the filter form includes a dual cone configuration having a proximal cone and a distal cone, a proximal cone base adjacent to a distal cone base, further comprising removing the polymeric filaments from the proximal cone and fusing the polymeric filaments on the distal cone near the distal cone base.

19. The method according to claim 1, wherein the dissolvable compound comprises a material selected from the group consisting of polyethylene oxide and other water soluble plastics, styrene, PVC and other chemical soluble plastics, sugar cubes, gypsum based compounds and other water soluble materials, and combinations thereof.

20. The method according to claim 1, wherein the positioning step comprises pre-fabricating a filter form and bonding the filter form to the mandrel.