Embolic filter device and method of use thereof
In general, the invention features an intra-vascular device for filtering or deflecting emboli or other large objects from entering a protected secondary vessel or vessels. The device of the invention may include a filter, an central member, additional supporting members, and a delivery cable and may serve to filter or deflect emboli or other large objects from entering protected secondary vessels. The device may be capable of collapse along its longitudinal axis for ease of delivery to the treatment site. The device may further be compatible with common delivery methods used in interventional cardiology (e.g., TAVI procedures). The device may be integrated into the delivery systems. In other embodiments the device may be detachable from the delivery system. Upon deployment, the device may be positioned so as to contact the orifice of one or more secondary blood vessels. Upon retrieval the device may be retracted in an orientation substantially similar to the original deployment orientation.
1. An intra-vascular device comprising;
a filter for preventing embolic particles from passing therethrough with a blood flow downstream of an aortic valve into side branch vessels of said aortic arch to the brain of a patient while allowing passage of blood flow from an aortic arch to at least one of said side branch vessels, and said filter comprising an outer skeleton around and connected to said filter, said outer skeleton providing structural support and configured to create a seal between said device and a wall of said aortic valve;
a central member connected to said filter, wherein, when said device is deployed in a primary blood vessel having more than one side branch vessels, said filter having a length for covering at least two of said more than one side branch vessels;
wherein said device is capable of collapse along a longitudinal axis;
wherein said central member is a wire member running longitudinally along a center of said device, and disposed entirely within a periphery of said outer skeleton of said filter when said filter is fully deployed, said central member providing structural support with respect to shape and stiffness of the device; and
said device is permanently connected to a delivery cable.
2. The device as in claim 1 , wherein said central member is hollow.
3. The device as in claim 2 , wherein said hollow central member permits the passage of a guidewire.
4. The device as in claim 1 , wherein said device further comprises one or more additional members extending outwards from the central member.
5. The device as in claim 4 , wherein said one or more additional members provide structural support.
6. The device as in claim 4 , wherein said one or more additional members comprise NiTi.
7. The device as in claim 1 , wherein said filter comprises braided, woven, or clustered material.
8. The device as in claim 1 , wherein said filter comprises Nitinol mesh.
9. The device as in claim 1 , wherein said filter comprises perforated film.
10. The device as in claim 8 , wherein said mesh is laminated.
11. The device as in claim 1 , wherein said filter is adapted to conform to the vessel wall.
12. The device as in claim 1 , wherein said outer skeleton defines the edge of the filter.
13. The device as in claim 1 , wherein the filter extends beyond the outer skeleton, allowing the filter to conform to the wall of said primary blood vessel.
14. The device as in claim 1 , wherein said device further comprises a radiopacity marker.
15. The device as in claim 14 , wherein said radiopacity marker is a bead or a clamp.
16. The device as in claim 4 , wherein said one or more additional members are located above the filter.
17. The device as in claim 4 , wherein said one or more additional members are located below the filter.
18. The device as in claim 1 , wherein said central member further comprises a preformed bend proximal to said filter.
19. The device as in claim 1 , wherein said filter has a length to width ratio between 8:1 and 18:7.