Filter apparatus for ostium of left atrial appendage

US9132000B2 · kind B2 · utility

Assignee

• Atritech, Inc. · US

Inventors

• Robert A. VanTassel · Excelsior, US
• Robert G. Hauser · Orr, US
• Robert S. Schwartz · Rochester, US
• David Holmes · Rochester, US
• Gregg Sutton · Maple Grove, US
• Thomas E. Borillo · Plymouth, US
• Jeffrey Welch · New Hope, US

Key dates

• Filing date: Jun 19, 2013
• Grant date: Sep 15, 2015
• Expiry date: Jun 19, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2230/0093
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Apparatus for permanent placement across an ostium of a left atrial appendage in a patient, which includes a filtering membrane configured to extend across the ostium of the left atrial appendage. The filtering membrane has a permeable structure which allows blood to flow through but substantially inhibits thrombus from passing therethrough. The apparatus also includes a support structure attached to the filtering membrane which retains the filtering membrane in position across the ostium of the left atrial appendage by permanently engaging a portion of the interior wall of the left atrial appendage. The support structure may be radially expandable from a first configuration to a second configuration which engages the ostium or the interior wall of the left atrial appendage. The filtering membrane may define an opening therethrough that is configured to expand from a first size which inhibits the passage of thrombus therethrough to a second size which allows an interventional device, e.g., an expansion balloon, to pass therethrough, and wherein the opening is resiliently biased towards the first size.