Device and method for regulating and presetting the pump rate of blood pumps
AssigneeFresenius Medical Care Deutschland GmbH
InventorsChristoph Wiktor, Arne Peters, Alexander Heide, Manfred Weis
Life of this patent
Estimating the term…
Abstract
For regulating and presetting the pump rate of a blood pump, a device and a method are configured for monitoring blood pressure values upstream and/or downstream from the blood pump. The monitored values, or another value formed from the monitored values, are compared with a limit value, which depends on an operating parameter or a pump parameter of the blood pump. In violation of the limit value, the pump rate of the blood pump is modified to such an extent, or a new pump rate is determined, such that the limit value is no longer violated or the degree of violation is reduced.
Claims15
A method of controlling a centrifugal blood pump, said method comprising the steps of:
- determining a current pump rate of the centrifugal blood pump;
- determining a blood pressure upstream and/or downstream from the centrifugal blood pump;
- and
- controlling the centrifugal blood pump at a new Pump rate when the blood pressure upstream and/or downstream from the centrifugal blood pump, and/or a difference in the blood pressure values upstream and downstream from the centrifugal blood pump, violate a limit value, which depends on the pump rate of the centrifugal blood pump, which would result in the limit value no longer being violated or the difference in the blood pressure downstream from the centrifugal blood pump and the limit value, or upstream from the centrifugal blood pump and the limit value, decreasing,
- such that any damage to the blood being pumped by the centrifugal blood pump is less than or equal to the damage which would be associated with the blood being pumped by a hose reel pump in comparable service, and with an identical blood pressure downstream therefrom,
- with the step of controlling including a determination of any damage to the blood being pumped by the centrifugal blood pump relative to damage to the blood which would be associated with the blood being pumped by the hose reel pump in comparable service by processing stored comparative experimental data associated with the centrifugal blood pump and the hose reel pump in comparable service, the experimental data including blood pressure, blood flow rate, and any resulting blood damage.
A device comprising
- a control unit;
- a centrifugal blood pump, which is controllable by the control unit;
- and
- at least one sensor for detecting a blood pressure upstream and/or downstream from the centrifugal blood pump,
- the control unit being configured such that an initial pump rate of the centrifugal blood pump is to be established or to be determined, and if the blood pressure upstream and/or downstream from the centrifugal blood pump and/or a difference in the blood pressures upstream and downstream from the centrifugal blood pump violate(s) a limit value which depends on the pump rate of the centrifugal blood pump, the pump rate of the centrifugal blood pump is adjusted until the limit value is no longer violated, or the difference in the blood pressure downstream from the centrifugal blood pump and the limit value, or upstream from the centrifugal blood pump and the limit value, decreases,
- such that any damage to the blood being pumped by the centrifugal blood pump is less than or equal to the damage which would be associated with the blood being pumped by a hose reel pump in comparable service, and with an identical blood pressure downstream therefrom,
- with the control unit being configured to make a determination of any damage to the blood being pumped by the centrifugal blood pump relative to damage to the blood which would be associated with the blood being pumped by the hose reel pump in comparable service by processing stored comparative experimental data associated with the centrifugal blood pump and the hose reel pump in comparable service, the experimental data including blood pressure, blood flow rate, and any resulting blood damage.
Dependencies are inferred from the claim text.