Embolic protection device

• US 20070066991A1
• Filed: 09/13/2006
• Published: 03/22/2007
• Est. Priority Date: 09/16/2005
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Magnuson, Mark
• Granted Patent: US 8,377,092 B2
• 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 2230/0078 hyperboloidal

Abstract

An embolic protection device includes a basket formed from flexible struts. The struts extend from a first end of the basket to the second end of the basket. The struts form a middle portion of the basket where the struts extend substantially perpendicular to a longitudinal axis, running between the first and second end of the basket.

Claims

1. An embolic protection device for use in a vessel, the embolic protection device comprising:

a basket having a first end and a second end, a longitudinal axis of the basket extending between the first end and second end, a middle portion of the basket being located between the first end and second end, the basket including a plurality of struts, the plurality of struts extending at least substantially perpendicular to the longitudinal axis along the middle portion of the basket; and

a filter portion attached to the plurality of struts and extending between the middle portion and the second end of the basket.

2. The embolic protection device according to claim 1, wherein the basket is movable between an expanded and collapsed state.

3. The embolic protection device according to claim 2, wherein the plurality of struts are biased into the expanded state.

4. The embolic protection device according to claim 2, further comprising a core wire extending between the first end and the second end.

5. The embolic protection device according to claim 4, wherein the core wire is slidable relative to the plurality of struts to force the basket into the collapsed state.

6. The embolic protection device according to claim 1, wherein the plurality of struts extend from the first end substantially parallel to the longitudinal axis.

7. The embolic protection device according to claim 6, wherein the plurality of struts extend from the second end substantially parallel to the longitudinal axis.

8. The embolic protection device according to claim 6, wherein the plurality of struts extend perpendicular to the longitudinal axis for a distance according to the relationship d=π

D/(2n);

where d is the distance that the plurality of struts travel perpendicular to the longitudinal axis, D is a cross sectional diameter of the basket, and n is a number of struts forming the basket.

9. The embolic protection device according to claim 1, further comprising a floppy tip attached to the second end.

10. The embolic protection device according to claim 1, further comprising a tubular portion attached to the second end, the tubular portion being configured to receive a wire guide through the tubular portion.

11. The embolic protection device according to claim 1, wherein the plurality of struts extend helically between the first end and the middle portion of the basket.

12. The embolic protection device according to claim 1, wherein the plurality of struts extend helically between the second end and the middle portion of the basket.

13. The embolic protection device according to claim 1, wherein the filter portion is attached to the plurality of struts at the second end of the basket.

14. The embolic protection device according to claim 1, wherein the filter portion is attached to the plurality of struts along the middle portion of the basket.

15. The embolic protection device according to claim 1, wherein the filter portion is made of a mesh material.

16. The embolic protection device according to claim 1, wherein the filter portion is made of a porous sheet material.

17. The embolic protection device according to claim 1, wherein the plurality of struts are formed of a shape memory material.

18. The embolic protection device according to claim 1, wherein middle portion of the basket is configured to provide a radial force sealing the filter portion against an inner wall of the vessel.

19. An embolic protection device for use in a vessel, the embolic protection device comprising:

a basket having a first end and a second end, a longitudinal axis of the basket extending between the first and second end, a middle portion of the basket being located between the first end and second end, the basket including a plurality of struts, the plurality of struts extending from a first end of the basket to a middle portion of the basket, the plurality of struts extending substantially perpendicular to the longitudinal axis along the middle portion of the basket;

a filter portion attached to the plurality of struts and extending between the middle portion and the second end of the basket; and

a core wire extending between the first end and the second end wherein the plurality of struts are spirally wound at the first end of the basket forming a lumen, the wire core extending through the lumen; and

wherein the plurality of struts extend helically between the first and second end of the basket, and the middle portion of the basket is biased to provide a radial force sealing the filter portion against an inner wall of the vessel.

20. An embolic protection assembly for capturing emboli during treatment of a stenotic lesion in a body vessel, the assembly comprising:

a balloon catheter having a tubular body portion and an expandable balloon attached to and in fluid communication with the tubular body portion for angioplasty at the stenotic lesion, the expandable balloon having distal and proximal portions; and

an embolic protection device coaxially disposed within the balloon catheter during treatment of the stenotic lesion in the body vessel, the device comprising;

a basket having a first end and a second end, a longitudinal axis of the basket extending between the first and second end, a middle portion of the basket being located between the first end and second end, the basket including a plurality of struts, the plurality of struts extending at least substantially perpendicular to the longitudinal axis along the middle portion of the basket; and

a filter portion attached to the struts and extending between the middle portion and the second end of the basket.