Fig 1.
An example of real and imaginary parts of impedance [R(f) (closed circles) and X(f) (open circles)] together with the fits provided by the 2-compartment model. The areas AX and AR are shown as the shaded regions. The diagram at right shows the 2-compartment series model of the respiratory system characterized by the 5 parameters central airway resistance (Rc), central airway elastance (Ec), central airway gas inertance (Ic), peripheral airway resistance (Rp), and peripheral airway elastance (Ep).