Figure 3
Variability, patient-ventilator asynchrony and regional distribution of ventilation. Variability, patient-ventilator asynchrony, and distribution of regional ventilation by electrical impedance tomography (EIT) during (conventional) pressure support ventilation (PSV) and noisy (variable) PSV. (A) coefficient of variation of tidal volume (CV VT); (B) asynchrony events; (C) percentage of ventilation assessed by electrical impedance tomography (EIT); *, P <0.05 vs. PSV. Data in panel A and C are presented as mean and standard deviation (SD), data in panel B as median and range. Two-way analysis of variance (ANOVA), paired t tests and Wilcoxon signed-rank tests were used as appropriate.