Embolic protection device

• US 20070088383A1
• Filed: 10/02/2006
• Published: 04/19/2007
• Est. Priority Date: 10/03/2005
• Status: Active Grant

• Current Assignee: Cook Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Pal, Dharmendra, Magnuson, Mark
• Granted Patent: US 8,632,562 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/012 Multiple filtering units
• 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: A61F 2230/008 paraboloidal

Abstract

An embolic protection device for deployment in a body vessel is provided for filtering emboli within the body vessel. The embolic protection device generally includes a filter having a plurality of openings formed therethrough and an extraction element configured to be movable with respect to the filter between a non-extraction position and an extraction position. The extraction element is located distally of the filter when in the non-extraction position so as to allow the filter to open into an expanded state to collect the emboli. Additionally, the extraction element is disposed about at least a portion of the filter when in the extraction position so as to close the filter into a collapsed state and to permit the embolic protection device to be extracted from the body vessel.

Claims

1. An embolic protection device for filtering emboli in a body vessel, the device comprising:

a filter having a plurality of openings formed therethrough, the filter having an expanded state and a collapsed state; and

an extraction element configured to be movable with respect to the filter between a non-extraction position, where the extraction element is located distally of the filter, and an extraction position, where the extraction element is disposed around at least a portion of the filter so that the filter is in the collapsed state.

2. An embolic protection device as in claim 1, wherein the extraction element includes an extraction sleeve.

3. An embolic protection device as in claim 1, wherein the extraction element includes an extraction wire defining a loop.

4. An embolic protection device as in claim 3, wherein the extraction wire defines a plurality of closed loops.

5. An embolic protection device as in claim 4, wherein each of the plurality of loops is movable with respect to each other.

6. An embolic protection device as in claim 3, wherein the extraction wire defines a coiled wire.

7. An embolic protection device as in claim 1, wherein the filter includes a first filter element and a second filter element spaced apart from each other.

8. An embolic protection device as in claim 7, wherein the first filter element defines a plurality of first filter openings, the second filter element defines a plurality of second filter openings, and each of the first filter openings are larger than each of the second filter openings.

9. An embolic protection device as in claim 7, wherein the first filter openings are decreasing in size from a proximal portion to a distal portion of the first filter and the second filter openings are decreasing in size from a proximal portion to a distal portion of the second filter.

10. An embolic protection device as in claim 7, wherein the filter includes a third filter element spaced apart from the first and the second filter elements.

11. An embolic protection device as in claim 1, further comprising a delivery element configured to be movable with respect to the filter between a delivery position, where the delivery element is disposed about at least a portion of the filter so that the filter is in the collapsed state, and a non-delivery position, where the delivery element is located proximally from the filter.

12. An embolic protection device as in claim 11, wherein the extraction element includes an extraction sleeve and the delivery element includes a delivery sleeve.

13. An embolic protection device as in claim 11., further comprising:

a filter control wire coupled with the filter and configured to control the position thereof;

an extraction control wire coupled with the extraction element and configured to control the position thereof; and

a delivery control wire coupled with the delivery element and configured to control the position thereof.

14. An embolic protection device as in claim 13, wherein the filter control wire is a hollow wire defining a conduit receiving at least a portion of the extraction control wire and at least a portion of the delivery control wire.

15. An embolic protection device as in claim 13, wherein an outer diameter of the filter control wire is substantially greater than an outer diameter of the extraction control wire and is substantially greater than an outer diameter of the delivery control wire.

16. An assembly for removing emboli from a body vessel, the assembly comprising:

an inflatable catheter having a deflated state to facilitate delivery of the inflatable catheter within the body vessel and an expanded state to facilitate expansion of a wall of the body vessel, thereby potentially releasing the emboli into the body vessel;

an outer catheter for delivering the inflatable catheter into the body vessel;

an embolic protection device positioned distally of the inflatable catheter for collecting the emboli, the embolic protection device including;

a filter having a plurality of openings formed therethrough, the filter having an expanded state and a collapsed state; and

an extraction element configured to be movable with respect to the filter between a non-extraction position, where the extraction element is located distally of the filter, and an extraction position, where the extraction element is disposed about at least a portion of the filter so that the filter is in the collapsed state.

17. An assembly as in claim 16, wherein the filter of the embolic protection device includes a first filter element and a second filter element spaced apart from each other.

18. An assembly as in claim 16, the embolic protection device further including a delivery element configured to be movable with respect to the filter between a delivery position, where the delivery element is disposed about at least a portion of the filter so that the filter is in the collapsed state, and a non-delivery position, where the delivery element is located proximally from the filter.

19. An assembly as in claim 18, the embolic protection device further including:

a filter control wire coupled with the filter and configured to control the position thereof;

an extraction control wire coupled with the extraction element and configured to control the position thereof; and

a delivery control wire coupled with the delivery element and configured to control the position thereof.

20. An embolic protection device for filtering emboli in a body vessel, the device comprising:

a first filter element having a plurality of first openings formed therethrough; and

a second filter element having a plurality of second openings formed therethrough, the second filter element having a proximal end and a distal end, wherein the proximal end of the second filter element is connected to the first filter element.

21. An embolic protection device as in claim 20 wherein the first filter element and the second filter element overlap each other to define an overlapping distance along a longitudinal axis of the embolic protection device.

22. An embolic protection device as in claim 20 further comprising a third filter element having a plurality of third openings formed therethrough, the third filter element having a proximal end and a distal end, wherein the proximal end of the third filter element is connected to the second filter element.

23. An embolic protection device as in claim 22 wherein the second filter element and the third filter element overlap each other to define a second overlapping distance along a longitudinal axis of the embolic protection device.

24. An embolic protection device as in claim 22 wherein the embolic protection device has a substantially constant outer diameter between a proximal end of the first filter element and the distal end of the third filter element.

25. An embolic protection device as in claim 22 wherein the plurality of second openings are generally smaller than the plurality of first openings and the plurality of third openings are generally smaller than the plurality of second openings.