Patent ID: 11890416
Assignee: DRÄGERWERK AG & CO. KGAA
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A process comprising the steps of:
presetting a computer-analyzable lung-mechanical model which describes at least one relationship between a pneumatic parameter to be determined and one or more of:
a volume flow signal for a flow of breathing air to and/or from the lungs of the patient; and
a volume signal for a filling level of the lungs of the patient; and
a measurable pneumatic pressure signal for pressure in airways or in an esophagus of the patient; and
a respiratory signal correlated with the spontaneous breathing of the patient;

presetting a computer-evaluable gradient model for the pneumatic parameter, wherein the gradient model describes a value of the pneumatic parameter for a scanning time as a function of at least N values of a variable, which is variable over time and which is correlated with the pneumatic parameter for N previous scanning times, wherein N is a preset number, and
automatically generating, with a data-processing signal processing unit, a respective signal value for at least one signal to which the lung-mechanical model refers; and
during the generation of the signal values, with the signal processing unit, receiving measured values from an airway pressure sensor and/or from an esophageal pressure sensor and/or from a volume flow sensor and/or from a volume sensor and based on the measured values generating one or more of the volume flow signal and the volume signal and the measurable pneumatic pressure signal;
during the generation of the signal values, with the signal processing unit, receiving sensor array measured values from a sensor array on skin of the patient and generating the respiratory signal from the sensor array measured values;
with the signal processing unit, determining N respective values for any variable that is correlated with the pneumatic parameter and appears in the gradient model for N consecutive scanning times; and
with the signal processing unit, determining a respective value for the pneumatic parameter during a subsequent use phase for at least one scanning time, wherein the signal processing unit uses for the determination of the respective value for the pneumatic parameter during the subsequent use phase at least:
generated signal values for the scanning time;
respective, already determined N values of the correlating variable of the gradient model for N previous scanning times;
the lung-mechanical model; and
the gradient model, wherein the signal processing unit provides the pneumatic parameter as input to a ventilator for synchronizing operation of the ventilator with spontaneous breathing of a ventilated patient based on the pneumatic parameter.