Mechanical pump for removal of fragmented matter and methods of manufacture and use

US7655016B2 · kind B2 · utility

Assignee

• Covidien LP · US

Inventors

• Denise Demarais · Los Gatos, US
• Stephen A. Leeflang · Emeryville, US
• Michael A. Evans · Palo Alto, US
• Gwendolyn Watanabe · Sunnyvale, US
• John C. Tanner, II · Lake Bluff, US
• Christian S. Eversull · Palo Alto, US

Key dates

• Filing date: Mar 9, 2004
• Grant date: Feb 2, 2010
• Expiry date: Nov 30, 2026

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2017/320775
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Material transport catheters and methods for their use rely on rotation of an impeller within a catheter body and a clearing element for preventing buildup of materials at the opening of the catheter body. The impeller preferably comprises an inner tube or shaft having a helical rotor formed over an outer surface thereof. The clearing element may comprise a free end of a structure near the distal end of the catheter body for disrupting clot, wherein the free end of the structure extends into the distal opening of the catheter body to break up materials as the impeller is rotated. Alternatively, the clearing element may comprise a cutting member disposed at the distal opening of the catheter body.