Table 4.

Mean percent changes for several parameters during VV₀, VV₁₅, VV_22.5, and VV₃₀ compared to BASELINE.

	%VV0	%VV15	%VV22.5	%VV30
E (cmH2O/mL)	+15.4	−3.8	−10.5	−17.6
PAT (ms)	+50.0	+46.2	+35.4	−20.7
PET (ms)	+4.9	−7.2	−7.0	−15.3
PAT/PET	+50.3	+58.0	+73.6	−4.4
RV area (cm2)	−17.9	+1.5	−2.2	+25.5
PaO2 (mmHg)	+32.7	+50.9	+42.2	+43.3

Positive and negative mean percent changes in several parameters in each group compared to BASELINE (n = 7 emphysema animals). VV₀: variable ventilation with 0% coefficient of variability in tidal volume; VV₁₅: variable ventilation with 15% coefficient of variability in tidal volume; VV_22.5: variable ventilation with 22.5% coefficient of variability in tidal volume; VV₃₀: variable ventilation with 30% coefficient of variability in tidal volume; E: respiratory system elastance; PAT: pulmonary acceleration time; PET: pulmonary ejection time; RV: right ventricle; PaO₂: arterial partial pressure of oxygen. Only statistically significant findings are presented.