Vein filter

• US 8,591,541 B2
• Filed: 03/29/2012
• Issued: 11/26/2013
• Est. Priority Date: 01/22/2004
• Status: Active Grant

• Current Assignee: Argon Medical Devices
• Original Assignee: REX Medical LP
• Inventors: McGuckin, James F. Jr., Bressler, James E., Thinnes, John H. Jr., DeFonzo, Stephen A., Carter, Lindsay L.
• Primary Examiner(s): HOLWERDA, KATHLEEN SONNETT
• Application Number:
  US13/433,500
• Publication Number:
  US 20120184986A1
• Time in Patent Office: 607 Days
• Field of Search: 606/108, 606/113, 606/114, 606/127, 606/128, 606/159, 606/194, 606/200, 623/23.72
• 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 2/848 having means for fixation to the vessel wall, e.g. barbs
• 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 2002/8483 Barbs
• 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 having a first region and a second region, the filter movable between a collapsed position for delivery to the vessel and an expanded position for placement within the vessel. The first region has a filter portion having a converging region to direct particles toward the center of the filter and includes a plurality of spaced apart filter struts. The struts each have a strut height defined as a distance between a first wall and a second wall. A plurality of hooks are at the second region, the hooks having a vessel penetrating tip and a width greater than the width of the strut from which it extends such that the penetrating tip portion of the hook extends beyond the first wall.

Claims

1. A vessel filter comprising a tubular region and a plurality of elongated filter struts extending initially linearly distally from the tubular region and then angling radially outwardly from a longitudinal axis of the filter to diverge, the plurality of elongated filter struts including at least first, second and third elongated filter struts, the first elongated filter strut separating into diverging first and second connecting struts which extend therefrom in different directions, the second elongated filter strut separating into diverging third and fourth connecting struts extending therefrom in different directions, the first and third connecting struts converging at a first joining region to form a first four sided closed geometric shape and the second connecting strut converging at a second joining region with a fifth connecting strut diverging from the third elongated filter strut to form a second four sided closed geometric shape, the first and second geometric shapes formed in a filter region of the filter, a transverse dimension at the joining regions of the connecting struts being greater than a transverse dimension at the tubular region, and an elongated mounting strut extending from each of the joining regions and being unconnected along their length.

2. The vessel filter of claim 1, wherein the elongated mounting struts further comprise a vessel engaging hook extending therefrom.

3. The vessel filter of claim 2, wherein the elongated mounting struts terminate in the vessel engaging hooks.

4. The vessel filter of claim 1, wherein the vessel filter has a midpoint, and a region wherein the first and second elongated filter struts separate is proximal of the midpoint.

5. The vessel filter of claim 1, wherein the first and second closed geometric shapes are substantially diamond shaped.

6. The vessel filter of claim 1, wherein the tubular region has a cutout formed therein to form a retrieval hook.