Table 1. Glossary.

Parameter/State	Physiologic description
TLC [ml]	Total lung capacity
RV [ml]	Residual volume
FRC [ml]	Functional residual capacity
VC[ml]	Vital capacity
RR [br/min]	Respiratory rate
f [br/s]	Respiratory frequency
T [s]	Duration of respiratory cycle
VT [ml]	Tidal volume
${\dot{V}}_E$ [ml/min]	Minute ventilation
${\dot{V}}_A$ [ml/s]	Airflow
Amus [cm H2O]	Muscle pressure amplitude
Ptm [cm H2O]	Transmural pressure
PA [cm H2O]	Alveolar pressure
Pel [cm H2O]	Lung elastic recoil (transpulmonary pressure)
Pve [cm H2O]	Viscoelastic component of pressure
Pl,dyn [cm H2O]	Dynamic pulmonary pressure
Ppl [cm H2O]	Pleural pressure
Pcw [cm H2O]	Chest wall elastic recoil
Pmus [cm H2O]	Respiratory muscle pressure
CA [ml/cm H2O]	Lung compliance
Cw [ml/cm H2O]	Chest wall compliance
Crs [ml/cm H2O]	Respiratory system compliance
Rrs [cm H2O s/L]	Respiratory system resistance
ν	Fraction of VC for chest wall relaxation volume
V0 [ml]	Chest wall relaxation volume
β	Baseline fraction of lung recruited at Pel = 0
γ	Maximum recruitable function of lung
α	Lower asymptote, fraction recruitment
k [1/cm H2O]	Characterizes slope, aggregate lung elasticity
cF [cm H2O]	Pressure at maximum lung recruitment
dF [cm H2O]	Characterizes slope at maximum lung recruitment
aw [ml]	Lower asymptote, chest wall compliance
bw [ml]	Characterizes slope, Pcw → ∞
cw [cm H2O]	Transition point, chest wall compliance
dw [cm H2O]	Characterizes slope, Pcw → ∞
ac [ml]	Lower asymptote, collapsible airway
bc [ml]	Upper asymptote, collapsible airway
cc [cm H2O]	Pressure at peak collapsible airway compliance
dc [cm H2O]	Characterizes slope, peak coll. airway compliance
Kc	Collapsible airway resistance coefficient
Vc,max [ml]	Peak collapsible airway volume
Rs,m [cm H2O s/L]	Minimum small airway resistance
Rs,d [cm H2O s/L]	Change in small airway resistance
Ks	Small airway resistance low pressure coefficient
Iu [cm H2O s2/L]	Upper airway inertance
Ru,m [cm H2O s/L]	Laminar value, upper airway resistance
Ku [cm H2O s/L]	Turbulent coefficient, upper airway resistance
Cve [L / cm H2O]	Lung viscoelastic compliance
Rve [cm H2O s/L]	Lung viscoelastic resistance