Tidal VolumeRespiration, ArtificialRespiratory Distress Syndrome, AdultVentilator-Induced Lung InjuryPositive-Pressure RespirationBarotraumaAcute Lung InjuryLungVentilators, MechanicalLung ComplianceLung InjuryPulmonary VentilationRespiratory MechanicsRespirationBronchoalveolar Lavage FluidVentilationHigh-Frequency VentilationCarbon DioxidePulmonary Gas ExchangeLung Volume MeasurementsIntermittent Positive-Pressure VentilationRespiratory Dead SpaceVentilator WeaningHypercapniaAir PressureHigh-Frequency Jet VentilationNoninvasive VentilationWork of BreathingIntubation, IntratrachealRespiratory RateAirway ResistanceBlood Gas AnalysisOxygenRespiratory Function TestsInhalationPartial PressureVentilation-Perfusion RatioBlood VolumeFunctional Residual Capacity