Temporary vascular filter guide wire

• US 7,996,993 B2
• Filed: 01/30/2007
• Issued: 08/16/2011
• Est. Priority Date: 11/03/1997
• Status: Expired due to Fees

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Gray, William, Gambale, Richard A.
• Primary Examiner(s): Bryant; David P
• Assistant Examiner(s): Walters; Ryan J
• Application Number:
  US11/699,878
• Publication Number:
  US 20070126161A1
• Time in Patent Office: 1,659 Days
• Field of Search: 298/966.2, 294/191, 294/12, 294/17, 294/18, 294/22, 294/23, 294/24, 606/200, 606/91, 606/92, 606/108, 606/113, 606/114, 606/126, 606/127, 623/1.1
• US Class Current: 29/896.62
• 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 method of making a filter is disclosed including 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.

Claims

1. A method of making a filter, comprising:

providing a mandrel;

forming a plurality of spaced apart crimps in the mandrel and positioning a filter form over each of the crimps, each filter form including a dissolvable compound;

wherein the 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;

disposing a filter basket over each filter form;

dissolving the filter forms; and

removing the mandrel from the filter baskets.

2. The method according to claim 1, wherein the forming step includes spacing the crimps from one another in the range of approximately 2 inches to approximately 3 inches.

3. The method according to claim 1, 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.

4. The method according to claim 1, wherein the disposing step comprises braiding an inner braid layer over the filter forms and bonding the inner braid layer.

5. The method according to claim 4, wherein the bonding step includes forming a first joint between each of the filter forms.

6. The method according to claim 5, wherein the first joint comprises a curable epoxy.

7. The method according to claim 5, further comprising severing the first joints and installing a filter mesh over at least a portion of each of the filter forms.

8. The method according to claim 7, further comprising reconnecting the severed first joints.

9. The method according to claim 8, wherein the reconnecting step includes splicing a section of heat shrink tubing over the first joints.

10. The method according to claim 8, further comprising braiding an outer braid layer over the inner braid layer and filter meshes to form a plurality of filter baskets.

11. The method according to claim 10, further comprising bonding the outer braid layer by forming a second joint over the first joint and cutting the mandrel at the second joint.

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

13. The method according to claim 12, wherein each 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.

14. The method according to claim 13, further comprising bonding a sleeve to an end of the filter basket adjacent to the distal cone following the removing step.

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

16. The method according to claim 15, wherein each 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.

17. The method according to claim 1, wherein the dissolvable compound comprises a material selected from the group consisting of polyethylene oxide, styrene, PVC, sugar cubes, and gypsum based compounds.