Constant Phase Model

The Constant Phase Model is an advanced model of respiratory mechanics that offers an easy-to-use parametric distinction between central and peripheral respiratory mechanics. The Constant Phase Model was introduced by Hantos et al.

Abbr.	Parameter	Description
Rn	Newtonian Resistance	The Newtonian Resistance parameter of the Constant Phase Model represents the resistance of the central airways.
I	Inertance	The Inertance parameter of the Constant Phase Model represents the inertive properties of the gases in the airways.
G	Tissue Damping	Tissue damping is closely related to tissue resistance and reflects the energy dissipation in the lung tissues.
H	Tissue Elastance	The parameter H is closely related to tissue elastance and reflects the energy conservation in the lung tissues.
eta	Hysteresivity	Tissue hysteresivity ({eta}) characterizes the ratio of energy dissipation to energy conservation in the lung tissues.
COD	Coefficient of Determination	The COD is a quality control parameter measuring the goodness of the model fit.