Vein filter

• US 7,338,512 B2
• Filed: 03/22/2004
• Issued: 03/04/2008
• Est. Priority Date: 01/22/2004
• Status: Active Grant

• Current Assignee: Argon Medical Devices
• Original Assignee: REX Medical LP
• Inventors: McGuckin, James F. Jr., Thinnes, John H.
• Primary Examiner(s): Dawson; Glenn K.
• Assistant Examiner(s): SONNETT, KATHLEEN C
• Application Number:
  US10/805,796
• Publication Number:
  US 20050165441A1
• Time in Patent Office: 1,443 Days
• Field of Search: 606/159, 606/200, 606/127, 606/113, 606191-198, 623 111- 115, 623/1.23
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• 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 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• 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. 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 vessel engaging structure including a first set of hooks and a second set of hooks, each set of hooks being positioned at an end of the mounting section, each of the hooks of the first set of hooks having a maximum transverse dimension greater than a maximum transverse dimension of each of the hooks of the second set of hooks.

2. The vessel filter of claim 1, wherein the mounting section includes a plurality of struts and one of the hooks extends from a terminal end of the strut, the terminal end of each strut defining a first plane and each hook extending from the strut lying in the first plane of the strut.

3. The vessel filter of claim 2, wherein plurality of struts includes a first set of struts axially offset from a second set of struts.

4. The vessel filter of claim 3, wherein the filter is formed from a laser cut tube, the tube cut to form a set of struts, wherein each of the hooks of the second set of hooks are formed of a transverse dimension substantially corresponding to a transverse dimension of one strut and each of the hooks of the first set are formed of a transverse dimension substantially corresponding to a transverse dimension of two adjacent struts.

5. The vessel filter of claim 3, wherein an outer surface of the second set of hooks substantially conforms to an inner surface of the first set of hooks.

6. The vessel filter of claim 1, wherein the mounting section includes a first and a second set of struts and the first set of struts is axially offset from the second set of struts.

7. The vessel filter of claim 6, wherein the filter is formed from a laser cut tube, the tube cut to form a set of struts, wherein each of the hooks of the second set of hooks are formed of a transverse dimension substantially corresponding to a transverse dimension of one strut and each of the hooks of the first set are formed of a transverse dimension substantially corresponding to a transverse dimension of two adjacent struts.

8. The vessel filter of claim 1, wherein the filter is formed from a laser cut tube, the tube cut to form a set of struts, wherein each of the hooks of the second set of hooks are formed of a transverse dimension substantially corresponding to a transverse dimension of one strut and each of the hooks of the first set are formed of a transverse dimension substantially corresponding to a transverse dimension of two adjacent struts.

9. The vessel filter of claim 1, wherein an outer surface of the second set of hooks substantially conforms to an inner surface of the first set of hooks.