Tidal VolumeRespiration, ArtificialRespiratory MechanicsRespirationVentilators, MechanicalPositive-Pressure RespirationPulmonary VentilationLung ComplianceVentilator-Induced Lung InjuryRespiratory Dead SpaceLung Volume MeasurementsRespiratory Distress Syndrome, AdultCarbon DioxideBlood VolumeAir PressurePulmonary Gas ExchangeRespiratory RateAirway ResistanceHypercapniaInhalationBarotraumaLungLung InjuryWork of BreathingRespiratory Function TestsFunctional Residual CapacityBlood Gas AnalysisOxygenPlethysmographyPlethysmography, Whole BodyRespiratory MusclesHyperventilationAcute Lung InjuryDiaphragmPressureRespiratory Physiological PhenomenaPartial PressureIntubation, IntratrachealHigh-Frequency VentilationRespiratory InsufficiencyCapnographyVentilator WeaningStroke VolumePulmonary Stretch ReceptorsThoraxPlasma VolumePulmonary AlveoliInspiratory CapacityApneaForced Expiratory VolumeLung DiseasesEquipment DesignSpirometryVagotomyPlethysmography, ImpedanceAnesthesiaExhalationTime FactorsPulmonary EdemaHemodynamicsAnesthesia, GeneralChemoreceptor CellsManikinsDioctyl Sulfosuccinic AcidTotal Lung CapacityExpiratory Reserve VolumeBronchoalveolar Lavage FluidOxygen ConsumptionErythrocyte VolumeCardiac OutputVital CapacityArrhythmia, SinusAerosolsPulmonary SurfactantsAnoxiaPhrenic NerveThoracic WallLung Diseases, ObstructiveBlood Volume DeterminationHeliumRespiratory-Gated Imaging TechniquesLaryngeal MasksBronchoconstrictor AgentsInteractive Ventilatory SupportAnalog-Digital ConversionHeart RateResuscitationBronchoconstrictionNeonatologyRespiratory ParalysisForced Expiratory Flow RatesIntermittent Positive-Pressure VentilationModels, AnatomicBlood PressureMagnetic Resonance ImagingProne PositionPulmonary AtelectasisReproducibility of ResultsImaging, Three-DimensionalAbdomen