VentilationRespiration, ArtificialPulmonary VentilationHigh-Frequency VentilationIntermittent Positive-Pressure VentilationTidal VolumePositive-Pressure RespirationHigh-Frequency Jet VentilationNoninvasive VentilationVentilator WeaningRespirationRespiratory MechanicsVentilators, MechanicalPulmonary Gas ExchangeNeutrophil InfiltrationCarbon DioxideVentilation-Perfusion RatioIntubation, IntratrachealLungRespiratory Distress Syndrome, AdultHypercapniaVentilator-Induced Lung InjuryOxygenWork of BreathingBlood Gas AnalysisPartial PressureLung ComplianceTracheostomyOne-Lung VentilationAir PressureHeliumIntensive Care UnitsLaryngeal MasksVentilators, Negative-PressureRespiratory Function TestsRespiratory Distress Syndrome, NewbornMasksMaximal Voluntary VentilationLung Volume MeasurementsLeukemic InfiltrationTime FactorsIntensive CareLung InjuryAirway ResistanceAnoxiaDisease Models, AnimalRespiratory Dead SpaceTracheotomyAcute Lung InjuryRespiratory RateDiaphragmApneaHypoventilationProne PositionIntermittent Positive-Pressure BreathingLung DiseasesOxygen Inhalation TherapyPulmonary CirculationMice, Inbred C57BLRespiratory Physiological PhenomenaKrypton RadioisotopesPulmonary EdemaAirway ObstructionRespiratory MusclesHyperventilationKryptonPulmonary AtelectasisBarotraumaProspective StudiesCritical IllnessInfant, NewbornInflammationAnesthesia, GeneralAirway ExtubationTreatment OutcomeFunctional Residual CapacityLung Diseases, ObstructiveChemoreceptor CellsInhalationOxygen ConsumptionAir ConditioningPulmonary AlveoliInteractive Ventilatory SupportCritical CareAcute DiseaseNeuromuscular DiseasesMacrophagesAir MovementsEquipment DesignPressureMiddle Ear VentilationRespiratory TherapyFluorocarbonsNeutrophilsIntensive Care Units, PediatricHemodynamicsPneumonia, Ventilator-AssociatedRetrospective StudiesInfant, PrematurePulmonary Disease, Chronic Obstructive