发明名称 |
BACKFLOW DETECTION FOR CENTRIFUGAL BLOOD PUMP |
摘要 |
A centrifugal pump system for a cardiac assist device employs a disc-shaped impeller having an outer circumference adapted to be rotatably driven in a pumping direction. A pump housing has a pumping chamber receiving the impeller, wherein the pumping chamber defines an outlet volute having a separation edge spaced from the outer circumference to provide a limited backflow path coinciding with the pumping direction. A motor drives the impeller in response to a voltage provided to the motor. A current sensor measures current flow within the motor in response to the voltage. A controller estimates a pump flow rate in response to a predetermined relation between the measured current and the pump flow rate, wherein the predetermined relation includes a positive slope from a predetermined backflow rate to a zero pump flow rate. |
申请公布号 |
EP2945661(A1) |
申请公布日期 |
2015.11.25 |
申请号 |
EP20140741083 |
申请日期 |
2014.01.16 |
申请人 |
THORATEC CORPORATION |
发明人 |
YANAI, MASAMICHI;ZHANG, TAO;HOUDEK, JEFFREY, G. |
分类号 |
A61M1/10 |
主分类号 |
A61M1/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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