VEIN FILTER

• US 20100312270A1
• Filed: 06/01/2010
• Published: 12/09/2010
• Est. Priority Date: 01/22/2004
• Status: Active Grant

• Current Assignee: Argon Medical Devices
• Original Assignee: REX Medical LP
• Inventors: McGuckin, Jame F. JR., Thinnes, John H.
• Granted Patent: US 8,100,936 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0059 temporary

Abstract

A vessel filter comprising a first region and a second region wherein the filter is movable between a collapsed position for delivery to the vessel and an expanded position for placement within the vessel. A first region has a filter portion having a converging region at a first end portion to direct particles toward the center of the filter and the second region is flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the first end portion. The second region includes a vessel engaging portion at the second end portion. The second region includes a plurality of spaced apart struts with adjacent struts being joined.

Claims

1-15. -15. (canceled)

16. A vessel filter comprising a body formed from a tube, the body having a first region and a second region, the first region including a filtering section for capturing particles and having a first transverse dimension, the second region including a mounting section for mounting the filter within the vessel, the mounting section having a second transverse dimension greater than the first transverse dimension and including vessel engaging structure to retain the filter, the first region further including a plurality of cutouts formed partially in the tube configured to receive a removal tool such as a retrieval snare to remove the filter from the vessel, the cutouts being axially spaced.

17. The vessel filter of claim 16 wherein the cutouts are helically formed.

18. A vessel filter comprising first and second end portions, a first region at the first end portion and a second region at the second end portion, the first region including a filtering section for capturing particles and having a first transverse dimension at a first terminal end of the filter, the second region including a mounting section at a second terminal end of the filter for mounting the filter within the vessel, the mounting section having a second transverse dimension at the second terminal end of the filter, the second dimension being greater than the first transverse dimension and including vessel engaging structure to retain the filter, the first region further including a retrieval region, the retrieval region having only one hook having a cutout exposing an internal annular surface, the hook having a single ear, the annular surface dimensioned to receive a portion of a retrieval sheath.

19. The vessel filter of claim 18, wherein the retrieval region includes a radiused region having first and second curved surfaces extending distally inwardly.

27. The vessel filter of claim 18, wherein the filter is formed from a laser cut tube, the tube cut to form struts in the first and second regions.

28. The vessel filter of claim 18, wherein the hook is formed radially spaced from a central longitudinal axis of the filter.

29. The vessel filter of claim 27, wherein the hook is formed by a portion of a wall of the tube cut to expose an annular interior surface.

30. The vessel filter of claim 29, wherein a proximalmost end portion of the hook is removed to provide a surface for abutment of a retrieval sheath.

31. The vessel filter of claim 18, wherein the retrieval region includes first and second angled side walls forming camming surfaces to direct the hook and filter into a retrieval sheath.

20. A vessel filter comprising a first region and a second region, the first region including a filtering section for capturing particles and having a first transverse dimension, the second region including a mounting section for mounting the filter within the vessel, the mounting section having a second transverse dimension greater than the first transverse dimension and including vessel engaging structure to retain the filter, the first region further including a retrieval region having a longitudinal axis, the retrieval region including only one hook, the hook positioned on only one side of the longitudinal axis at a proximal end thereof and a curved wall spaced axially from the hook to provide a camming surface to facilitate entry into a retrieval sheath, the hook having an inner surface exposed and dimensioned to receive a portion of a retrieval device.

26. The vessel filter of claim 20, further comprising vessel engaging hooks, the vessel engaging hooks extending from the mounting section to be positioned at a terminal end of the filter.

32. The vessel filter of claim 20, wherein a proximalmost end portion of the hook is curved in a direction radially with respect to a central longitudinal axis of the filter.

33. The vessel filter of claim 20, wherein the filter is formed from a laser cut tube, the tube cut to form struts in the first and second regions.

34. The vessel filter of claim 33, wherein the hook is formed by a portion of a wall of the tube cut to expose an annular interior surface.

35. The vessel filter of claim 34, wherein a proximalmost end portion of the hook is removed to provide a surface for abutment of a retrieval sheath

21-25. -25. (canceled)