Radiopaque embolic protection filter membrane

• US 20040193208A1
• Filed: 03/27/2003
• Published: 09/30/2004
• Est. Priority Date: 03/27/2003
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Chin, Yem, Lowe, Brian J., Zhong, Sheng-Ping, Hirshman, Peter, Hansen, James G., Dao, Kinh-Luan D., Talpade, Dnyanesh
• Application Number:
  US10/400,751
• Publication Number:
  US 20040193208A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• 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 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0097 Harpoon-shaped
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers

Abstract

An embolic protection filter assembly and method of making the same. In at least some embodiments, the present invention relates to embolic protection filters having at least one radiopaque component.

Claims

1. A method of manufacturing an embolic protection filter assembly, comprising the steps of:

providing a forming member;

disposing a filter frame over at least a portion of the forming member;

providing a filter material, the filter material including one or more radiopaque components; and

disposing the filter material over at least a portion of the filter frame.

2. The method of claim 1, wherein the step of providing a filter material includes providing a molten polymer doped with a radiopaque substance.

3. The method of claim 2, wherein the forming member includes a mandrel.

4. The method of claim 1, wherein the step of disposing the filter material over at least a portion of the filter frame includes disposing a first layer of the filter material over at least a portion of the filter frame and disposing a second layer of a second filter material adjacent the first layer.

5. The method of claim 4, further comprising the step of disposing a third layer of a third filter material adjacent the first layer and the second layer.

6. The method of claim 4, wherein at least one of the first layer, second layer, or third layer includes a radiopaque material.

7. A method of manufacturing an embolic protection filter, comprising the steps of:

providing a mandrel member including a filter-shaped region;

providing a filter material doped with a radiopaque material;

applying the filter material to the filter-shaped region of the mandrel member, wherein a filter portion of the filter material attaches to and generally conforms to the shape of the filter-shaped region; and

allowing the filter portion to solidify.

8. The method of claim 7, further comprising the step of separating the filter portion from the filter-shaped region.

9. The method of claim 7, further comprising the step of forming a plurality of holes in the filter portion.

10. The method of claim 7, further comprising the step of coupling the filter portion to an elongate shaft.

11. An embolic protection filter assembly, comprising:

a filter frame having a body portion and a mouth portion;

a filter material coupled to the filter frame; and

wherein the filter material includes at least one radiopaque component disposed adjacent the body portion.

12. The embolic protection filter assembly of claim 11, wherein the filter frame comprises nickel-titanium alloy.

13. The embolic protection filter assembly of claim 11, wherein the filter material is polymeric.

14. The embolic protection filter assembly of claim 11, wherein the radiopaque component of the filter material is disposed homogeneously throughout the filter material.

15. The embolic protection filter assembly of claim 11, wherein the filter material includes a plurality of layers and wherein the radiopaque component comprises at least one of the layers.

16. The embolic protection filter assembly of claim 11, wherein the radiopaque component includes bismuth.

17. The embolic protection filter assembly of claim 11, wherein the radiopaque component includes iodine.

18. The embolic protection filter assembly of claim 11, wherein the filter material includes polyurethane.

19. A method of manufacturing an embolic protection filter assembly, comprising the steps of:

providing a forming member;

disposing a first layer of filter material over at least a portion of the mandrel layer;

disposing a second layer of filter material over at least a portion of the first layer;

disposing a third layer of filter material over at least a portion of the second layer; and

wherein at least one of the layers includes a radiopaque material.

20. The method of claim 19, wherein the step of disposing a first layer of filter material over at least a portion of the mandrel layer includes braiding.

21. The method of claim 19, further comprising the step of coupling the filter portion to an elongate shaft.

22. An multi-layer embolic protection filter, comprising:

a first polymeric layer;

a second layer disposed adjacent the first layer;

a third layer disposed adjacent the first layer and the second layer; and

wherein at least one of the first layer, second layer, or third layer includes a radiopaque component.

23. The multi-layer embolic protection filter of claim 22, wherein the radiopaque component includes a radiopaque wire encapsulated in a polymer.

24. The multi-layer embolic protection filter of claim 22, wherein the radiopaque component includes bismuth.

25. The multi-layer embolic protection filter of claim 22, wherein the radiopaque component includes platinum.

26. The multi-layer embolic protection filter of claim 22, wherein the radiopaque component includes gold.