Respiration, ArtificialTracheotomyIntermittent Positive-Pressure VentilationPulmonary Stretch ReceptorsRespirationRespiratory InsufficiencyCarbon DioxideVentilationPulmonary VentilationInfant, NewbornHigh-Frequency VentilationTidal VolumePositive-Pressure RespirationHigh-Frequency Jet VentilationNoninvasive VentilationVentilator WeaningRespiratory MechanicsVentilators, MechanicalPulmonary Gas ExchangeVentilation-Perfusion RatioIntubation, IntratrachealHypercapniaRespiratory Distress Syndrome, AdultVentilator-Induced Lung InjuryOxygenWork of BreathingBlood Gas AnalysisPartial PressureLungLung ComplianceTracheostomyOne-Lung VentilationAir PressureHeliumIntensive Care UnitsLaryngeal MasksVentilators, Negative-PressureRespiratory Distress Syndrome, NewbornMasksMaximal Voluntary VentilationRespiratory Function TestsLung Volume MeasurementsIntensive CareRespiratory Dead SpaceAnoxiaAirway ResistanceRespiratory RateApneaLung InjuryHypoventilationDiaphragmProne PositionIntermittent Positive-Pressure BreathingOxygen Inhalation TherapyRespiratory Physiological PhenomenaKrypton RadioisotopesAcute Lung InjuryPulmonary CirculationRespiratory MusclesHyperventilationKryptonPulmonary AtelectasisBarotraumaAirway ObstructionCritical IllnessAirway ExtubationFunctional Residual CapacityLung Diseases, ObstructiveChemoreceptor CellsInhalationAnesthesia, GeneralTime FactorsAir ConditioningOxygen ConsumptionPulmonary EdemaLung DiseasesInteractive Ventilatory SupportCritical CareNeuromuscular DiseasesProspective StudiesAir MovementsMiddle Ear VentilationRespiratory TherapyPressurePulmonary AlveoliEquipment DesignIntensive Care Units, PediatricFluorocarbonsTreatment OutcomePneumonia, Ventilator-AssociatedInfant, PrematureCapnographyAPACHEPulmonary Disease, Chronic ObstructiveHemodynamicsContinuous Positive Airway PressureLength of StayPulmonary SurfactantsXenon RadioisotopesRespiratory Paralysis