Figure 2
Forced oscillatory airway (Raw, airway resistance) and respiratory tissue (G, damping and H, elastance) mechanical parameters, the slope of the third phase of the capnogram as expressed in the time domain before (S T-III ) and after normalization for the mean expired CO2 (Sn T-III ), or as a function of expired volume before (S V-III ) and after (Sn V-III ) normalization, partial pressure of oxygen in the arterial blood (PaO 2 ) and dynamic compliance (Crs) displayed by the respirator in patients with healthy lungs (Group HL), and in patients with respiratory symptoms with Crs in the lowest tenth percentile (Group LC), with Crs between the tenth and the ninetieth percentile (Group MC) and with Crs above the ninetieth percentile in (Group HC). *, P < 0.05 vs. the variable at the previous PEEP level; #, P < 0.05 vs. a variable at a PEEP of 3 cmH2O. α, P < 0.05 vs. Group HL within a PEEP; β, P < 0.05 vs. Group HC within a PEEP; γ, P < 0.05 vs. Group MC within a PEEP.