AirVentilationRespiration, ArtificialPulmonary VentilationHigh-Frequency VentilationTidal VolumeIntermittent Positive-Pressure VentilationPositive-Pressure RespirationHigh-Frequency Jet VentilationNoninvasive VentilationAir PollutantsRespirationVentilator WeaningAir PollutionRespiratory MechanicsVentilators, MechanicalPulmonary Gas ExchangeCarbon DioxideVentilation-Perfusion RatioAir MicrobiologyAir MovementsIntubation, IntratrachealAir PressureHypercapniaEmbolism, AirRespiratory Distress Syndrome, AdultAir Pollution, IndoorOxygenAir ConditioningLungBlood Gas AnalysisVentilator-Induced Lung InjuryPartial PressureWork of BreathingLung ComplianceTracheostomyHeliumOne-Lung VentilationRespiratory Function TestsIntensive Care UnitsLaryngeal MasksMasksVentilators, Negative-PressureRespiratory Distress Syndrome, NewbornMaximal Voluntary VentilationLung Volume MeasurementsAnoxiaIntensive CareAirway ResistanceAir SacsRespiratory Dead SpaceTracheotomyAir Pollutants, OccupationalRespiratory RateApneaLung InjuryOxygen Inhalation TherapyHypoventilationDiaphragmRespiratory Physiological PhenomenaProne PositionHyperventilationBarotraumaIntermittent Positive-Pressure BreathingPulmonary CirculationTime FactorsKrypton RadioisotopesAcute Lung InjuryRespiratory MusclesInhalationInfant, NewbornAirway ObstructionKryptonPulmonary AtelectasisLung DiseasesHumidityLung Diseases, ObstructiveCritical IllnessOxygen ConsumptionChemoreceptor CellsFunctional Residual CapacityAirway ExtubationAnesthesia, GeneralPulmonary EdemaProspective StudiesPressureEquipment DesignPulmonary AlveoliAerosolsInteractive Ventilatory SupportCritical CareNeuromuscular DiseasesRespiratory TherapyMiddle Ear VentilationFluorocarbonsTreatment OutcomeIntensive Care Units, PediatricInfant, PrematureCapnographyInsufflation