VentilationRespiration, ArtificialPulmonary VentilationContinuous Positive Airway PressurePositive-Pressure RespirationHigh-Frequency VentilationIntermittent Positive-Pressure VentilationTidal VolumeNoninvasive VentilationVentilator WeaningSleep Apnea, ObstructiveHigh-Frequency Jet VentilationRespirationRespiratory MechanicsVentilators, MechanicalPulmonary Gas ExchangeCarbon DioxideVentilation-Perfusion RatioIntubation, IntratrachealMasksWork of BreathingHypercapniaPolysomnographyOxygenRespiratory Distress Syndrome, AdultSleep Apnea SyndromesBlood Gas AnalysisAir PressurePartial PressureRespiratory Distress Syndrome, NewbornVentilator-Induced Lung InjuryLung ComplianceLungTracheostomyRespiratory Function TestsLaryngeal MasksOne-Lung VentilationAirway ResistanceOxygen Inhalation TherapyLung Volume MeasurementsHeliumIntensive Care UnitsVentilators, Negative-PressureMaximal Voluntary VentilationTracheotomyIntensive CareRespiratory RateAnoxiaApneaIntermittent Positive-Pressure BreathingTreatment OutcomeAirway ObstructionRespiratory Dead SpaceProspective StudiesPulmonary EdemaInhalationInfant, NewbornRespiratory MusclesPatient ComplianceAirway ExtubationPulmonary AtelectasisHumidityEquipment DesignLung InjuryTime FactorsHypoventilationDiaphragmProne PositionPulmonary CirculationPressureLung Diseases, ObstructiveInfant, PrematureRespiratory Physiological PhenomenaKrypton RadioisotopesAcute Lung InjuryRespiratory TherapyHyperventilationKryptonOxygen ConsumptionBarotraumaCritical IllnessFunctional Residual CapacityChemoreceptor CellsAnesthesia, GeneralAir ConditioningBronchopulmonary DysplasiaLung DiseasesInteractive Ventilatory SupportCritical CareNeuromuscular DiseasesAir MovementsMonitoring, PhysiologicMiddle Ear VentilationSleep Apnea, CentralCross-Over StudiesPulmonary SurfactantsPulmonary AlveoliPulmonary Disease, Chronic ObstructiveExpiratory Reserve VolumeRetrospective Studies