S12 Vet Monitor User’s Manual
18-10
18.6.2. Input Parameter
Input Parameter Unit Full Name
FiO2 % percentage fraction of inspired oxygen
RR rpm respiration rate
PeCO2 mmHg, kPa partial pressure of mixed expiratory CO2
PaCO2 mmHg, kPa partial pressure of carbon dioxide inthearteries
PaO2 mmHg, kPa partial pressure of oxygen in the arteries
TV mL tidal volume
RQ respiratory quotient
ATMP mmHg, kPa atmospheric pressure
18.6.3. Output Parameter and calculation formula
Output
Parameter
Unit Full Name Formula
PAO2 mmHg,kPa
partial pressure of
oxygen in the
alveolar
PAO2=【FiO2×(ATMP－water
pressure) 】－(PaCO2×1.25)
Wherein the water pressure is
selected to be 47mmHg (6.3kPa)
AaDO2 mmHg,kPa
alveolar-arterial
oxygen difference
AaDO2=PAO2－PaO2
Pa/FiO2 mmHg,kPa oxygenation ratio Pa/FiO2= PaO2/FiO2
a/AO2 %
arterial to alveolar
oxygen ratio
a/AO2= （100 ×PaO2）/PAO2
MV L/min minute volume MV=(TV/1000)×RR
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