A rotary blood pump and control system therefor

Details A rotary blood pump and control system therefor A rotary blood pump and control system therefor

A - Human Necessities

61

M

A61M 1/12 (2006.01) A61M 1/10 (2006.01)

Patent

CA 2370755

A pump assembly (1, 33, 200) adapted for continuous flow pumping of blood. In a particular form the pump (1, 200) is a centrifugal pump wherein the impeller (100, 204) is entirely sealed within the pump housing (2, 201) and is exclusively hydrodynamically suspended therein as the impeller rotates within the fluid (105) urged by electromagnetic means external to the pump cavity (106, 203). Hydrodynamic suspension is assisted by the impeller (100, 204) having deformities therein such as blades (8) with surfaces tapered from the leading edges (102, 223) to the trailing edges (103, 224) of bottom and top surfaces (221, 222) thereof. Also disclosed is an estimation and control system for the pump assembly (1, 33, 200).

Ensemble pompe (1, 33, 200) conçu pour pomper du sang en continu. Dans un mode de réalisation spécifique, la pompe (1, 200) est une pompe centrifuge dans laquelle la roue (100, 204) loge de façon étanche à l'intérieur du carter (2, 201) et est suspendue de façon exclusivement hydrodynamique dans ledit carter simultanément à sa rotation à l'intérieur du liquide (105) poussé par des moyens électromagnétiques extérieurs à la cavité de pompe (106, 203). Les déformités, telles que des ailettes (8) dont les surfaces se rétrécissent depuis les bords avant (102, 223) jusqu'aux bords arrières (103, 224) des surfaces inférieure et supérieure (221, 222) de la roue (100, 204), contribuent à la suspension hydrodynamique de cette dernière. L'invention concerne également un système d'évaluation et de commande de l'ensemble pompe (1, 33, 200).

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