US 10,376,219 B2
Monitoring device for monitoring the state of the circulation of a patient and computer program product for this monitoring
Michael Imhoff, Lübeck (DE); Ernst-Wilhelm Schubert, Lübeck (DE); and Doreen Werner, Hamburg (DE)
Assigned to DRÄGERWERK AG & CO. KGAA, Lübeck (DE)
Appl. No. 15/32,436
Filed by Drägerwerk AG & Co. KGaA, Lübeck (DE)
PCT Filed Oct. 29, 2014, PCT No. PCT/EP2014/002902
§ 371(c)(1), (2) Date Apr. 27, 2016,
PCT Pub. No. WO2015/062720, PCT Pub. Date May 7, 2015.
Claims priority of application No. 10 2013 018 366 (DE), filed on Nov. 2, 2013.
Prior Publication US 2016/0270734 A1, Sep. 22, 2016
Int. Cl. A61B 5/02 (2006.01); A61B 5/00 (2006.01); A61B 5/021 (2006.01); A61B 5/029 (2006.01); A61M 16/00 (2006.01)
CPC A61B 5/7217 (2013.01) [A61B 5/02 (2013.01); A61B 5/021 (2013.01); A61B 5/029 (2013.01); A61B 5/7278 (2013.01); A61B 5/742 (2013.01); A61M 16/0057 (2013.01); A61M 2016/0027 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A monitoring device for monitoring a state of circulation of a patient ventilated with positive-pressure ventilation, the monitoring device comprising:
a data recording and analysis device receiving patient circulation data comprising a determined right atrial pressure, a mean arterial pressure and a cardiac output characterizing a current state of circulation of the patient, and further receiving a person-specific data factor and a pressure value characterizing a pressure assistance during the positive-pressure ventilation, wherein:
the data recording and analysis device is configured to determine a mean systemic filling pressure value as a function of the right atrial pressure, the mean arterial pressure, the person-specific data factor and the cardiac output;
the data recording and analysis device is configured to determine a cardiac efficiency value as a function of the mean systemic filling pressure and the right atrial pressure with predetermined factors and the person-specific data factor;
the data recording and analysis device is configured to determine a pressure-corrected mean systemic filling pressure value as a function of: a difference between the right atrial pressure and the pressure value characterizing a pressure assistance during the positive-pressure ventilation, the mean arterial pressure, the person-specific data factor, and the cardiac output; and
the data recording and analysis device is configured to determine a pressure-corrected cardiac efficiency value as a function of: the difference between the right atrial pressure and the pressure value characterizing the pressure assistance during the positive-pressure ventilation, the mean arterial pressure, the person-specific data factor, and the cardiac output; and
a display connected to the data recording and analysis device and displaying the mean systemic filling pressure value and the cardiac efficiency value, in a system of coordinates on the display and displaying the pressure-corrected mean systemic filling pressure value and the pressure-corrected cardiac efficiency value in the system of coordinates on the display, wherein:
the data recording and analysis device is configured to determine the pressure-corrected mean systemic pressure (Pmsp) based on an equation as follows:
Pmsp=a·(RAP−K·Pps,char)+b·MAP+c·CO
in which:
RAP: is the right atrial pressure (mmHg)
K: is a pressure conversion factor
MAP: is the mean arterial pressure (mmHg)
CO: is the cardiac output (L/min)
Pps,char: is the pressure value characterizing the pressure assistance during the positive-pressure ventilation (mbar)
a: is a predetermined factor (dimensionless) of the predetermined factors
b: is a predetermined factor (dimensionless) of the predetermined factors
c: is the person-specific factor (dyn·sec·cm−5·m2); and
the data recording and analysis device is configured to determine the pressure-corrected cardiac efficiency (Ehp) based on an equation as follows:

OG Complex Work Unit Drawing