Dual Endovascular Filter and Methods of Use

• US 20110022076A1
• Filed: 07/27/2010
• Published: 01/27/2011
• Est. Priority Date: 07/27/2009
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Claret Medical, Inc. (Boston Scientific Corporation)
• Inventors: Lashinski, Randall T.
• Granted Patent: US 8,753,370 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 2/011 Instruments for their placement or removal
• 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 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0095 Saddle-shaped

Abstract

Blood filter devices and methods of use.

Claims

1. An embolic filter device, comprising:

a frame having a delivery configuration and a deployed configuration;

a first filter portion and a second filter portion, wherein the first and second filter portions are secured to the frame, and wherein the first and second filter portions each have an open portion and a closed portion, wherein the open portion is adapted to allow foreign particles to pass therethrough and the closed portion is adapted to trap foreign particles therein.

2. The filter device of claim 1 further comprising an elongate delivery member secured to the frame.

3. The filter device of claim 1 wherein the closed portions of the first and second filter portions extend about 0.5 cm to about 3 cm from the frame.

4. The filter device of claim 1 wherein the first and second filter portions are generally dome shaped.

5. The filter device of claim 1 wherein the frame has a first portion and a second portion, wherein the first and second portions are adapted to be folded towards one another to reconfigure the frame into a retrieval configuration.

6. The device of claim 1, further comprising a delivery device through which the frame and the filter portions are adapted to be delivered, and further comprising a lock to lock the frame relative to the delivery device.

7. The device of claim 1, where the frame and the filter portions have an aspect ration of at least about 2:

1.

8. The device of claim 1 wherein the first and second filter portions are both concave.

10. The method claim 8 wherein the first and second filter portions each have an open portion and a closed portion, and wherein the positioning steps comprise positioning the first closed portion in the first vessel and positioning the second closed portion in the second vessel.

11. The method of claim 10 wherein positioning steps comprise positioning the closed ends about 0.5 cm to about 3 cm from the frame.

9. A method of protecting the cerebral vasculature, comprising:

a filter device comprising a frame and first and second filter portions secured to the frame, wherein the frame has a folded configuration and a deployed configuration;

deploying the filter device from a delivery device;

positioning the first filter portion relative to a first vessel such that foreign particles traveling into the first vessel will be trapped in the first filter portion; and

positioning the second filter portion relative to a second vessel such that foreign particles traveling into the second vessel will be trapped in the second filter portion.

12. The method of claim 9 wherein the deploying step comprises deploying the filter device from within a delivery device to allow the frame to reconfigure from the folded configuration to the deployed configuration.

13. The method of claim 9 further comprising creating a seal between the first and second vessels and the filter device by proximally retracting the frame into contact with tissue.

14. The method of claim 9 further comprising locking the position of the filter device relative to tissue.

15. The method of claim 9 wherein the deployed step comprises allowing the frame to reconfigure from the folded configuration to the deployed configuration.

16. The method of claim 9 further comprising folding the frame from the deployed configuration to the folded configuration, wherein folding the frame prevents foreign particles from being released from the filter portions.