Removable embolus blood clot filter

US7967838B2 · kind B2 · utility

Assignee

• C.R. Bard, Inc. · US

Inventors

• Andrzej J. Chanduszko · Chandler, US
• Robert M. Carr, Jr. · Paradise Valley, US
• John D. McDermott · Chandler, US
• John A. Kaufman · Rimrock, US

Key dates

• Filing date: May 9, 2006
• Grant date: Jun 28, 2011
• Expiry date: Apr 28, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2250/0098
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A removable blood clot filter includes a number of locator members and anchor members disposed radially and extending angularly downward from a hub. The locator members include a number of linear portions having distinct axes configured to place a tip portion approximately parallel to the walls of a blood vessel when implanted and to apply sufficient force to the vessel walls to position the filter near the vessel centerline. The anchor members each include a hook configured to penetrate the vessel wall to prevent longitudinal movement due to blood flow. The hooks may have a cross section sized to allow for a larger radius of curvature under strain so that the filter can be removed without damaging the vessel wall.