EMBOLIC PROTECTION DEVICE

• US 20110082492A1
• Filed: 10/05/2009
• Published: 04/07/2011
• Est. Priority Date: 10/05/2009
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Anderson, James, Arcand, Benjamin, Guest, Erin
• Granted Patent: US 8,298,258 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

Abstract

The invention provides an embolic filter, a support structure therefor, and methods for preparing said filter for deployment and retrieval.

Claims

1. An embolic filter comprising:

a first hub having an axial lumen therethrough, said lumen defining a longitudinal axis of the filter and adapted to receive a guidewire therethrough;

a second hub having an axial lumen therethrough, said lumen coinciding with the longitudinal axis of the filter and adapted to receive a guidewire therethrough wherein the first and second hubs are displaced along the longitudinal axis;

a first plurality of struts each having a first end, a second end, and a length, said first ends being directly connected to the first hub and the said second ends of the first plurality of struts being biased to expand away from the longitudinal axis of the filter;

a second plurality of struts each having a first end, a second end, and a length, said first ends directly connected to the second hub and the said second ends of the struts being biased to expand away from the longitudinal axis of the filter, wherein the lengths of the first plurality of struts is substantially the same as the lengths of the second plurality of struts and the two pluralities of struts assume equivalent angles with the longitudinal axis in an expanded state;

at least a first population and a second population of support elements directly connected to the second ends of the respective first and second pluralities of struts such that each population of support elements defines a plane transverse to the longitudinal axis of the filter, said planes being relatively displaced along the longitudinal axis of the filter;

a filter sac attached at its open end to the support elements and extending beyond the planes of the support elements in at least one of a proximal or distal direction;

at least one band element slidable over the hubs and the struts thereby moving those portions of the struts which are coupled to the support elements closer to the longitudinal axis of the filter; and

a control element attached to the band, said control element adapted to move the band along the longitudinal axis of the filter and over at least a portion of the longitudinal struts.

2. The embolic filter of claim 1, further comprising a second band and attached control element.

3. The embolic filter of claim 1, further comprising a guidewire disposed within the lumen of the first hub and the lumen of the second hub.

4. The embolic filter of claim 3, wherein the first hub is fixedly attached to the guidewire.

5. The embolic filter of claim 4, wherein the second hub is fixedly attached to the guidewire

6. The embolic filter of claim 1, further comprising a tubular element having a longitudinal lumen therethrough, said lumen sized to receive a guidewire.

7. The embolic filter of claim 6, wherein the first hub and the second hub are fixed to the tubular element in a spaced apart relationship.

8. The embolic filter of claim 6, further comprising a guidewire passing through the axial lumen of the tubular element.

9. The embolic filter of claim 8, wherein the tubular element is free to rotate and translate with respect to at least a portion of the guidewire.

10. The embolic filter of claim 9, wherein the portion of the guidewire with respect to which the tubular element is free to rotate and translate is defined by proximal and distal stops coupled to the guidewire.

11. An embolic filter comprising:

a hub having an axial lumen therethrough, said lumen defining a longitudinal axis of the filter and adapted to receive a guidewire therethrough;

at least two pluralities of generally longitudinal struts each having a first end and a second end, said first ends directly connected to the hub and the said second ends of the struts being biased to expand away from the longitudinal axis of the filter;

at least two groups of arcuate support elements directly connected to the respective second ends of the at least two pluralities of generally longitudinal struts such that each group of arcuate support elements defines a plane transverse to the longitudinal axis of the filter, said planes being relatively displaced along the longitudinal axis of the filter;

a filter sac attached at its open end to the arcuate support elements and extending beyond the planes of the support elements in at least one of a proximal or distal direction;

a band element slidable over the hub and the struts thereby moving those portions of the struts which are coupled to the arcuate support elements closer to the longitudinal axis of the filter; and

a control element attached to the band, said control element adapted to move the band along the longitudinal axis of the filter and over at least a portion of the longitudinal struts.

12. The embolic filter of claim 11, wherein the hub includes a tubular element having a longitudinal lumen therethrough, said tubular element extending at least partially into the filter sac.

13. The embolic filter of claim 11, further comprising a third set of arcuate support elements which lie in a third plane substantially perpendicular to a line extending through the axial lumen of the hub.

14. The embolic filter of claim 11, further comprising a fourth set of arcuate support elements which lie in a fourth plane substantially perpendicular to a line extending through the axial lumen of the hub.

15. The embolic filter of claim 11, wherein the arcuate elements, when viewed along the line extending through the axial lumen of the hub, form a complete circle.

16. The embolic filter of claim 11, wherein the arcuate elements, when viewed along the line extending through the axial lumen of the hub, form an incomplete circle.

17. The embolic filter of claim 11, further comprising a guidewire passing through the axial lumen of the hub.

18. The embolic filter of claim 17, wherein the hub is fixedly attached to the guidewire.

19. The embolic filter of claim 12, further comprising a guidewire passing through the axial lumen of the tubular element.

20. The embolic filter of claim 19, wherein the tubular element is free to rotate and translate with respect to a portion of the guidewire defined by proximal and distal stops coupled to the guidewire.