Dual inlet mixed-flow blood pump

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/10 (2006.01) A61M 1/12 (2006.01) F04D 1/04 (2006.01) F04D 3/02 (2006.01) F04D 13/06 (2006.01)

Patent

CA 2472088

A mixed-flow blood pump presents features of both axial-flow and radial-flow pumps. This mixed-flow blood pump comprises a stationary housing structure defining at least one blood inlet, a blood outlet, and a blood conduit between the at least one blood inlet and the blood outlet, and a rotative impeller mounted in the blood conduit. The at least one blood inlet, the blood outlet, the blood conduit and the rotative impeller have respective structures and configurations that operate the mixed-flow blood pump at a given point of a maximum hydraulic efficiency curve relating a specific pump rotational speed and a specific pump diameter. This given point is located within a transition region of the maximum hydraulic efficiency curve between axial-flow and radial- flow pumps.

L'invention concerne une pompe sanguine hélicocentrifuge présentant les caractéristiques d'une pompe à flux axial et d'une pompe à flux radial. Cette pompe sanguine hélicocentrifuge comprend une structure de logement fixe définissant au moins une entrée pour le sang, une sortie pour le sang et un conduit pour le sang, situé entre la ou les entrées et la sortie, ainsi qu'une roue rotative montée dans le circuit pour le sang. La ou les entrées, la sortie, le conduit et la roue rotative possèdent des structures et des configurations respectives permettant d'enclencher la pompe sanguine hélicocentrifuge à un point donné d'une courbe de rendement hydraulique maximal associée à une vitesse de rotation spécifique et à un diamètre spécifique de la pompe. Ce point donné se situe dans une zone de transition de la courbe de rendement hydraulique maximal, entre les pompes à flux axial et à flux radial.

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