Foam embolic protection device

• US 20070118173A1
• Filed: 11/16/2006
• Published: 05/24/2007
• Est. Priority Date: 11/17/2005
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Magnuson, Mark, Parker, Fred
• Granted Patent: US 8,152,831 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 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 2230/0067 conical
• CPC Class Codes: A61L 2400/16 Materials with shape-memory or superelastic properties
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/146 Porous materials, e.g. foams or sponges

Abstract

An embolic protection device includes a foam body attached to a plurality of flexible struts. The foam body has a generally conical geometry and the bottom of the conical geometry having a generally conical recess. The filter portion has pores sized such that blood cells can pass through the foam body, but larger material such as objects would be trapped in the recess. Each strut is attached along the periphery of the foam body and extend from the first end of the foam body to a connection point located proximate the first end.

Claims

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

a filter portion including a porous foam body comprised of a shape memory alloy; and

a plurality of struts attached to the filter portion and extending proximally therefrom, the filter portion and the plurality of struts forming a basket, where the basket is configured to have an expanded and collapsed state.

2. The embolic protection device according to claim 1, wherein the filter portion is comprised of a Nitinol foam.

3. The embolic protection device according to claim 1, further comprising a core wire attached to a distal end of the filter portion and extending proximally through the basket.

4. The embolic protection device according to claim 1, wherein the basket is biased into an expanded state.

5. The embolic protection device according to claim 1, wherein the filter portion includes a recess configured to trap emboli.

6. The embolic protection device according to claim 1, wherein the foam body has a generally conical geometry.

7. The embolic protection device according to claim 1, wherein the struts are radially spaced around the circumference of the generally conical geometry.

8. The embolic protection device according to claim 7, further comprising a plurality of folds in the generally conical geometry, each fold extending radially from an apex of the generally conical geometry and along a side of the generally conical geometry.

9. The embolic protection device according to claim 8, wherein the plurality of folds form an alternating pattern of inward and outward folds periodically spaced around a circumference of the generally conical geometry.

10. The embolic protection device according to claim 1, further comprising a floppy tip attached to the distal end of the basket.

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

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

a filter portion including a porous Nitinol foam body having a conical geometry;

a plurality of struts attached to the filter portion and extending proximally therefrom, the filter portion and the plurality of struts forming a basket, where the basket is configured to have an expanded and collapsed state; and

a plurality of folds in the conical geometry, the plurality of folds extending radially from an apex of the conical geometry and along a side of the conical geometry, wherein the plurality of folds form an alternating pattern of inward and outward folds periodically spaced around a circumference of the conical geometry.

13. The embolic protection device according to claim 12, wherein the basket is biased into an expanded state.

14. The embolic protection device according to claim 12, wherein the struts are radially spaced around the circumference of the conical geometry.

15. The embolic protection device according to claim 12, wherein the filter portion includes a recess configured to trap emboli.

16. The embolic protection device according to claim 15, wherein the recess has a generally conical geometry.

17. 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 filter portion including a porous foam body comprising a shape memory alloy, and

a plurality of struts attached to the filter portion and extending proximally therefrom, the filter portion and the plurality of struts forming a basket, where the basket is configured to have an expanded and collapsed state.

18. The embolic protection device according to claim 18, wherein the filter portion is comprised of a Nitinol foam.

19. The embolic protection device according to claim 18, wherein the foam body has a generally conical geometry and a plurality of folds in the generally conical geometry, each fold extending radially from an apex of the generally conical geometry and along a side of the generally conical geometry, wherein the plurality of folds form an alternating pattern of inward and outward folds periodically spaced around a circumference of the generally conical geometry.

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

a filter portion including a porous foam body, the foam body having a generally conical geometry including a plurality of folds, each fold extending radially from an apex of the generally conical geometry and along a side of the generally conical geometry; and

a plurality of struts attached to the filter portion and extending proximally therefrom, the filter portion and the plurality of struts forming a basket, where the basket is configured to have an expanded and collapsed state.