Abstract: Methods for operating a liquid pump having a rotor are provided for conveying liquids. The viscosity of the conveyed liquid, such as blood, may be determined while taking into account measured values of operating parameters of the pump. The pump may be operated in a predetermined region of a family of characteristic curves. The family of characteristic curves may link at least two operating parameters of the pump to each other, and, in the predetermined region, at least three parameters of the pump may be sensed and taken into account in order to determine the viscosity. Because of the operation in a predetermined region of a family of characteristic curves, the viscosity of the conveyed liquid can be determined in addition to the volumetric flow rate through the pump and the pressure difference across the pump when an appropriate selection is made from a sufficient number of sensed operating parameters.

Abstract: Methods for operating a pump are provided, the pump comprising a rotor for conveying fluids, wherein the volume flow rate through the pump and the pressure difference across the pump is determined, wherein at least one first operating parameter and in particular a second operating parameter of a first group of operating parameters are detected and, depending on the value of the first and in particular also the value of a second operating parameter of the first group, the volume flow rate through the pump and the pressure difference across the pump is determined from detected values of the operating parameters, either from the first group of operating parameters, or values of another set of operating parameters, in particular at least one additional operating parameter, are taken into consideration in order to determine the volume flow rate and the pressure difference across the pump.

Abstract: A device for separating condensed water from an operating gas of a pneumatic pulsatile system is provided. The device has a gas line section with a gas inlet and a first and a second gas outlet. The device further comprises a condensation container for extracting the condensed water out of the operating gas, said condensation container being connected to the second gas outlet. A transition region from the second gas outlet to the condensation container has a cross-sectional enlargement, and the condensation container has means for discharging the extracted condensed water. A pneumatic pulsatile system and a cardiac support system are also provided.

Abstract: Methods for operating a liquid pump having a rotor are provided for conveying liquids. The viscosity of the conveyed liquid, such as blood, may be determined while taking into account measured values of operating parameters of the pump. The pump may be operated in a predetermined region of a family of characteristic curves. The family of characteristic curves may link at least two operating parameters of the pump to each other, and, in the predetermined region, at least three parameters of the pump may be sensed and taken into account in order to determine the viscosity. Because of the operation in a predetermined region of a family of characteristic curves, the viscosity of the conveyed liquid can be determined in addition to the volumetric flow rate through the pump and the pressure difference across the pump when an appropriate selection is made from a sufficient number of sensed operating parameters.

Abstract: Methods for operating a pump are provided, the pump comprising a rotor for conveying fluids, wherein the volume flow rate through the pump and the pressure difference across the pump is determined, wherein at least one first operating parameter and in particular a second operating parameter of a first group of operating parameters are detected and, depending on the value of the first and in particular also the value of a second operating parameter of the first group, the volume flow rate through the pump and the pressure difference across the pump is determined from detected values of the operating parameters, either from the first group of operating parameters, or values of another set of operating parameters, in particular at least one additional operating parameter, are taken into consideration in order to determine the volume flow rate and the pressure difference across the pump.