Tidal VolumeRespiration, ArtificialVentilator WeaningVentilators, MechanicalPositive-Pressure RespirationPulmonary VentilationRespiratory MechanicsVentilator-Induced Lung InjuryRespirationVentilationRespiratory Distress Syndrome, AdultHigh-Frequency VentilationRespiratory InsufficiencyIntubation, IntratrachealLung CompliancePulmonary Gas ExchangeIntensive Care UnitsTracheostomyStress, MechanicalCarbon DioxideIntermittent Positive-Pressure VentilationLung Volume MeasurementsNoninvasive VentilationAir PressureRespiratory Dead SpaceWork of BreathingIntensive CareLungHypercapniaBlood Gas AnalysisLung InjuryDiaphragmCritical IllnessBarotraumaTracheotomyOxygenAirway ResistanceRespiratory Function Tests