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1. 发明授权

US12011581B2 Micro magnetic-hydraulic suspension centrifugal blood pump 有权
公开(公告)号：US12011581B2
公开(公告)日：2024-06-18
申请号：US17597435
申请日：2021-03-01
申请人： SHANGHAI DONGXIN BIOMEDICAL TECHNOLOGY CO., LTD.
发明人： Zhongmin Liu , Feng Wan , Yuanyi Peng , Guorong Li
IPC分类号： A61M60/232 , A61M60/422
CPC分类号： A61M60/232 , A61M60/422 , A61M2205/0211
摘要： The present disclosure relates to a micro magnetic-hydraulic suspension centrifugal blood pump, which is a pump and motor integrated device. The blood pump includes a pump housing, a rotor, an impeller, a servo motor, an inner magnetic core group, an outer magnetic ring group, a limiting device, and a suture snap ring device; the rotor and the impeller are seamlessly connected into a whole; the rotor is arranged in an inner pipe of the blood pump; the servo motor drives the rotor to drive the impeller to do work; the inner magnetic core group is arranged at a lower end inside the rotor; the outer magnetic ring group and a wrapping sleeve are upright in a pump cavity lower shell; an inner and outer magnetic combination can achieve a radial magnetic suspension effect of the impeller; a ceramic sheet and a ceramic cone form a temporary limiting bearing; a top end of a vane of the impeller is provided with an inclined surface; and the pump can generate hydraulic suspension during working. According to the technical solution of the present disclosure, the rotor impeller can work in a steady suspended state, which overcomes the friction effect of a mechanical bearing; the structures in the pump are simple and fluent, which can greatly reduce hemolysis and thromboembolic complications; the blood pump has a small volume and light weight, so that the invasiveness of operation is low, and the safety and the practicability can be improved.

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