Did you know?
Although the broadband forced oscillation manoeuvre may look like random noise during execution, it is in fact a precisely constructed signal that contains specific frequencies relevant to the subject being studied.
Broadband fot (PARTITIONED RESPIRATORY MECHANICS)
Also referred to as the low-frequency forced oscillation technique, a broadband forced oscillation manoeuvre measures the subject’s response to a signal containing a wide range of frequencies both below and above the subject’s breathing frequency. The outcome, respiratory system input impedance (Zrs), is the most detailed assessment of respiratory mechanics currently available.
Input impedance can be further analyzed using the Constant Phase Model (CPM), introduced by Hantos et al., to obtain a parametric distinction between airway and tissue mechanics. This distinction is invaluable to obtain an accurate understanding of how diseases affect lungs.
Input Impedance (Zrs): the combined effects of resistance, compliance and inertance as a function of frequency.
Newtonian resistance (Rn): parameter of the CPM which represents the resistance of the central or conducting airways.
Tissue damping (G): parameter of the CPM closely related to tissue resistance and reflects the energy dissipation in the alveoli.
Tissue elastance (H): parameter of the CPM closely related to tissue elastance and reflects the energy conservation in the alveoli.
Coefficient of determination (COD): quality control parameter measuring the quality of the constant phase model fit.