Blood pump with expandable cannula

US8535211B2 · kind B2 · utility

Assignees

• Thoratec Corporation · US
• The Penn State Research Foundation · US

Inventors

• Robert L. Campbell · Port Matilda, US
• Justin M. Walsh · Spring Mills, US
• Daniel Metrey · Blacksburg, US
• Robert F. Kunz · State College, US
• Thomas M. Mallison · State College, US
• Edward Boone · Pennsylvania Furnace, US
• Eric C. Myer · Spring Mills, US
• Mark W. McBride · Bellefonte, US
• Kevin J. Powell · Glen Gardner, US
• Daniel A. Walters · Denville, US

Key dates

• Filing date: Jul 1, 2010
• Grant date: Sep 17, 2013
• Expiry date: Jul 2, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M60/857
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body.