High-frequency oscillation improves mucus clearance and airway resistance in mechanically ventilated patients: a randomized clinical trial.

In the CHFO group, dorsal lung ventilation at T1 and T3 was significantly higher than baseline, whereas it was slightly lower at T0 compared to baseline, although this decrease did not reach statistical significance (Table S1, Fig. 2 ). ΔGI and ΔRVD index did not differ in the two groups at different timepoints.

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