Patent ID: 11959497
Assignee: BERLIN HEART GMBH
Field: Measurement (Instruments)
Classification: CPC F  A  G  H | IPC A  F  G  H

Claim 0:
1. A method for determining operational parameters of a blood pump comprising a rotor which transports blood, the method comprising:
determining a change in behaviour of at least two operational parameters including a first operation parameter and a second operation parameter, independently from each other, of the blood pump; and
determining a flow through the blood pump, a difference in pressure across the blood pump, and/or a viscosity of the blood based on the determined change in behaviour of the at least two operational parameters,
wherein a back EMF (electromagnetic force) of a brushless drive motor of the rotor is measured and, in the determination of the flow through the blood pump, the difference in pressure across the blood pump, and/or the viscosity of the blood, a differential equation is taken into consideration which describes a dependency of the back EMF on a rotor deflection in an axial direction of the blood pump, a rotational speed of the rotor, and drive power.