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

US6702830B1 · kind B1 · utility

Assignee

• Bacchus Vascular inc. · 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: Jun 9, 2000
• Grant date: Mar 9, 2004
• Expiry date: Jul 11, 2020

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2017/00685
• 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. The impeller preferably comprises an inner tube or shaft having a helical rotor formed over an outer surface thereof. Optionally, in the case of a tubular shaft, a second helical rotor may be provided within the shaft lumen in order to induce flow in opposite or in the same direction as induced by the outer helical rotor. Catheters may further comprise structures near their distal ends for disrupting clot, and are preferably introduceable over guidewires where the helical rotors are rotated directly over the guidewire. The catheters may include two or more impellers or impellers having two or more rotors in order to provide for circulation of materials at a target site within a patient body lumen.