Table 1.

Model descriptions

Symbols	Description	Units
P aw	Airway pressure in a breathing cycle	cmH2O
t	Time	s
E rs	Respiratory system elastance	cmH2O/l
V	Air volume	l
R rs	Respiratory airway resistance	cmH2Os/l
Q	Airway flow	l/s
P0	Offset pressure	cmH2O