Blood pump using cross-flow principles

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/10 (2006.01) F04D 17/04 (2006.01) F04D 29/28 (2006.01) A61M 1/12 (2006.01)

Patent

CA 2359934

A blood pump is provided which comprises a cross-flow pump head having an elongated generally cylindrical housing portion. The housing portion defines a blood inlet port on a surface thereof and a blood outlet port on an opposite surface thereof. An impeller within the housing portion provides cross-flow of the blood from the inlet port around and/or across the rotational axis of the impeller to the outlet, and a motor is provided for driving the cross-flow pump head. The blood pump may be small enough to permit percutaneous insertion of the pump into a patient's blood vessel, and thus may be utilizable as a left ventricular assist device. To this end, a collapsible polymeric outlow tube is coupled to the bood flow outlet and is adapted for directing the blood from the left ventricle to the aorta through the aortic valve.

L'invention concerne une pompe à sang comprenant une tête de pompe à écoulement croisé dotée d'un logement allongé généralement cylindrique. Ce logement définit un port d'entrée du sang sur sa surface et un port de sortie du sang sur une surface opposée. Une turbine située à l'intérieur du logement crée un écoulement croisé de sang partant du port d'entrée, circulant autour et/ou à travers l'axe de rotation de la turbine, en direction de la turbine. Un moteur entraîne la tête de pompe à écoulement croisé. Cette pompe à sang peut être suffisamment petite pour permettre son insertion percutanée dans le vaisseau sanguin d'un sujet, et peut, par conséquent, servir de dispositif d'assistance ventriculaire gauche. A cet effet, un tube d'évacuation polymère télescopique est couplé à la sortie d'évacuation du sang et permet de diriger le sang du ventricule gauche à l'aorte, en passant par les valvules aortiques.

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