Retrievable inferior vena cava filter system

Abstract

Abstract A percutaneous filter system (30) for providing temporary filtering of emboli from the blood. The filter system includes a delivery catheter (31) having a working access lumen (35) and a filter deployment/retrieval lumen (36) containing a deployable filtering device. The filtering device includes a deployment/retrieval wire section (12) and a filtering element (14) formed at the distal end. Filtering element (14) is made of shape memory/superelastic material and has a distally expanding frustoconical shape which, when the filtering element is deployed through filter deployment/retrieval lumen (36), defines an offset filtering channel from the deployment/retrieval axis which extends about the working access lumen axis (22). Emboli trapped within the filtering element are funneled toward working access lumen (35) and can be aspirated or otherwise removed. Other instrumentation may also be passed through the working access lumen into the blood vessel.

Inventors

• 👤 William H. Barnhart
• 👤 Elvira V. Lang

Bibliographic Details