Rotary blood pump for regulating a hemodynamic parameter successively to different target values

1. A blood pump for supporting a heart, the blood pump comprising:

a rotor with delivery elements;

a rotor drive;

a pressure sensor or another hemodynamic sensor;

a regulating device configured to regulate a pressure or another hemodynamic parameter by control of the rotor drive, wherein the regulating device is configured to regulate a specific pressure parameter or another specific hemodynamic parameter successively to different target values; and

a detection device for detecting a change in the pressure per unit of time in a detection range of the pressure sensor and for determining the maximum and/or minimum of this value in a heart cycle.

2. The blood pump according to claim 1 comprising a processing device configured to relate the determined maximum values in the changes in pressure to the adjusted target pressure parameters, and to determine a quotient from the determined maximum values of the changes in pressure and the adjusted target pressure parameters.

3. The blood pump according to claim 2 , wherein the processing device is configured to determine the slope of a line that is provided by a linear relationship between the determined maximum values of the changes in pressure and the adjusted target pressure parameters.

4. The blood pump according to claim 2 , wherein the processing device is configured to determine a quotient from a difference of two or more maximum values of the changes in pressure and the target pressure parameters associated with these values.

5. The blood pump according to claim 2 , wherein the adjusted target pressure parameter is end-diastolic pressure.

6. The blood pump according to claim 1 , wherein the another hemodynamic parameter that is regulated by the regulating device is the pulsatility of a pressure difference along the blood pump or of a flow rate through the blood pump.

7. The blood pump according to claim 1 , wherein a pressure sensor, or a flow sensor is connected directly to the regulating device.

8. The blood pump according to claim 7 , wherein the pressure sensor is an absolute pressure sensor.

9. The blood pump according to claim 1 , wherein the pressure sensor device comprises two pressure sensors, of which a first is arranged in or on the blood pump and a second is arranged in a volume not connected directly to the blood pump.

10. The blood pump according to claim 1 , wherein the pressure sensor and/or the another hemodynamic sensor are configured to determine the pressure and/or the another hemodynamic parameter, and/or the regulating device is configured to determine the pressure and/or the another hemodynamic parameter from operating parameters of the blood pump.

11. The blood pump according to claim 1 , wherein the regulating device is embodied such that the pressure and/or the another hemodynamic parameter is determined by means of one or a plurality of hemodynamic sensors and/or from operating parameters of the blood pump.

12. The blood pump according to claim 1 , wherein the pressure parameter is a hemodynamic pressure parameter.

13. The blood pump according to claim 1 , wherein the regulating device is configured to use an end-diastolic pressure determined from a cyclic pressure curve in the detection range of the pressure sensor.

14. The blood pump according to claim 1 , wherein the regulating device is suitable for periodically regulating to different target values.

15. A blood pump for supporting a heart, the blood pump comprising:

a rotor with delivery elements;

a rotor drive;

a pressure sensor or another hemodynamic sensor;

a regulating device configured to regulate a pressure or another hemodynamic parameter by control of the rotor drive, wherein the regulating device is configured to regulate a specific pressure parameter or another specific hemodynamic parameter successively to different target values; and

wherein an echocardiograph is provided for performing echocardiographic measurements and is triggered by or synchronized with changes in the control of the rotor drive.

16. A blood pump for supporting a heart, the blood pump comprising:

a rotor with delivery elements;

a rotor drive;

a hemodynamic sensor;

a regulating device configured to regulate a hemodynamic parameter by control of the rotor drive, wherein the regulating device is configured to regulate a specific hemodynamic parameter successively to different target values; and

wherein the regulating device is configured to regulate to varying target values during operation of the rotor drive such that at least one prespecified feature of a temporal curve of the pressure, a flow, a motor current, or a bearing position is attained.

17. The blood pump according to claim 16 , wherein the regulating device is configured to regulate the rotor drive alternating periodically such that an opening of the aortic valve may be evidenced based on a detected signal curve and/or a hemodynamic variable or an operating parameter of the blood pump.

18. The blood pump according to claim 16 , wherein the regulating device has a first operating state that corresponds to a first operation of the blood pump and a second operating state that is configured to regulate the rotor drive for a time interval such that an opening of the aortic valve may be evidenced based on a detected signal curve and/or a hemodynamic variable or an operating parameter of the blood pump.

19. The blood pump according to claim 18 , wherein a switching device is provided that switches between the first operating state and the second operating state according to a prespecified time pattern.