Fig. 3
From: Comparison of the ventilation characteristics in two adult oscillators: a lung model study
Relationship between airway pressure amplitude (Amp) and actual stroke volume (aSV) in the 3100B oscillator. Markers indicate individual data. X-axis is the airway pressure amplitude (Amp) displayed on the panel of the oscillator. a The results of IT = 50%. b The results of IT = 33%. The maximum Amp with the IT of 50% was 78.4 ± 1.4 cmH2O (mean ± SD) at 6 Hz and 77.4 ± 0.5 cmH2O at 8 Hz (a), and those with the IT of 33% were 84.2 ± 1.8 cmH2O at 6 Hz and 85.8 ± 1.1 cmH2O at 8 Hz (b). Dotted curves are second-order approximations. In a (IT = 50%), the coefficient of correlations (R) and P values are as follows: 6 Hz: R = 0.980 (P < 0.001) and 8 Hz: R = 0.987 (P < 0.001). In b (IT = 33%), R and P values are as follows: 6 Hz: R = 0.975 (P < 0.001) and 8 Hz: R = 0.977 (P < 0.001). In a (IT = 50%), there were no significant differences between the aSVs with an Amp of 70 and 75 cmH2O, 75 cmH2O and maximum Amp at 6 Hz, and between the aSVs with an Amp of 75 cmH2O and maximum Amp at 8 Hz. In the b (IT = 33%), there were no significant differences between all aSVs with an Amp ≥ 70 cmH2O at 6 Hz, and between all aSVs with an Amp ≥ 75 cmH2O and between the aSVs with an Amp of 70 and 75 cmH2O at 8 Hz