Patent
Centrifugal fluid pump assembly
TLDR
In this paper, a centrifugal fluid pump assembly includes a motor current flow rate-related data storage section 60 for storing, for a plurality of different predetermined viscosities, predetermined visco-ity-related flow rate data formed from a plurality-of-current-flow-rate relation data at different impeller rotational speeds at predetermined fluid viscosity.Abstract:
A centrifugal fluid pump assembly 1 includes a body section 5 and a control mechanism 6. The body section 5 includes a housing 20, an impeller 21 rotatable within the housing 20, and a motor 34 for rotating the impeller 21. The pump assembly 1 includes a motor current flow rate-related data storage section 60 for storing, for a plurality of different predetermined viscosities, predetermined viscosity-related flow rate data formed from a plurality of motor current flow rate relation data at a plurality of different impeller rotational speeds at predetermined fluid viscosity, a fluid measurement data inputting section 57, an impeller rotational speed measurement function, a motor current measurement function, and a flow rate calculating section 58 for using a fluid viscosity value, an impeller rotational speed value, a measured motor current and data stored in the motor current flow rate-related data storage section 60 to calculate a fluid flow rate.read more
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Patent
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Sensorless flow estimation for implanted ventricle assist device
Jeffrey A. Larose,Udai Singh +1 more
TL;DR: In this paper, a method of estimating the blood flow rate of a heart ventricle assist device which is positioned externally of, or implanted in, a patient is presented, where the assist device comprises a blood pump having a rapidly rotating, electrically powered impeller, and comprises briefly interrupting power to the impeller to cause its rotation to slow.
References
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Patent
Rotary blood pump and control system therefor
TL;DR: In this paper, the authors describe a pump that is entirely sealed within the pump housing and is exclusively hydrodynamically suspended therein against movement in three translational and two rotational degrees of freedom as the impeller rotates within the fluid urged by electromagnetic means external to the pump cavity.
Patent
Chronic performance control system for rotodynamic blood pumps
TL;DR: In this paper, a rotodynamic blood pump is powered by a brushless DC motor and three feedback channels, one for each of voltage, current, and motor speed lead to a microcontroller or microprocessor.
Patent
Magnetically suspended type pump
TL;DR: In this article, a magnetically suspended type pump is applied to a blood pump, in order to reduce the number of connections in a flow path and to avoid thrombus formation.
Journal ArticleDOI
Recent Studies of the Centrifugal Blood Pump with a Magnetically Suspended Impeller
TL;DR: To improve pump efficiency, the pump performances of many kinds of impeller vanes and diffusers were investigated, as well as the flow in the gap between the impeller discs and the pump housing.
Patent
Centrifugal blood pump driver apparatus
TL;DR: In this article, a centrifugal blood pump driver comprises a motor housing and the housing contains a motor for rotationally driving the motor and a controller associated with the motor for controlling the rotational speed of the motor.