RespirationAnesthesia, InhalationRespiration, ArtificialLaryngeal MasksIntubation, IntratrachealAnesthetics, InhalationAnesthesia, GeneralVentilationPulmonary VentilationHigh-Frequency VentilationIntermittent Positive-Pressure VentilationTidal VolumePositive-Pressure RespirationHigh-Frequency Jet VentilationNoninvasive VentilationVentilator WeaningRespiratory MechanicsVentilators, MechanicalPulmonary Gas ExchangeCarbon DioxideVentilation-Perfusion RatioHypercapniaRespiratory Distress Syndrome, AdultVentilator-Induced Lung InjuryOxygenWork of BreathingBlood Gas AnalysisPartial PressureLungLung ComplianceTracheostomyOne-Lung VentilationAir PressureHeliumIntensive Care UnitsVentilators, Negative-PressureRespiratory Distress Syndrome, NewbornMasksMaximal Voluntary VentilationRespiratory Function TestsLung Volume MeasurementsIntensive CareRespiratory Dead SpaceAnoxiaTracheotomyAirway ResistanceRespiratory RateApneaLung InjuryHypoventilationDiaphragmProne PositionIntermittent Positive-Pressure BreathingOxygen Inhalation TherapyRespiratory Physiological PhenomenaKrypton RadioisotopesAcute Lung InjuryPulmonary CirculationRespiratory MusclesHyperventilationKryptonPulmonary AtelectasisBarotraumaAirway ObstructionCritical IllnessAirway ExtubationFunctional Residual CapacityLung Diseases, ObstructiveChemoreceptor CellsInfant, NewbornInhalationTime 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