Pulmonary Gas ExchangeVentilation-Perfusion RatioPulmonary VentilationNoble GasesRespiratory Dead SpaceCarbon DioxideBlood Gas AnalysisRespiration, ArtificialRespiratory MechanicsRespirationTidal VolumePulmonary CirculationOxygenPartial PressurePulmonary AlveoliArrhythmia, SinusOxygen ConsumptionPulmonary Diffusing CapacityRespiratory Function TestsVentilationLungAnoxiaPulmonary EdemaGasesRespiratory Distress Syndrome, AdultHigh-Frequency VentilationPositive-Pressure RespirationSmoke Inhalation InjuryHyperventilationPhysical ExertionIntermittent Positive-Pressure VentilationCardiac OutputHemodynamicsExtravascular Lung WaterHepatopulmonary SyndromeExercise TestNitrogen RadioisotopesLung DiseasesHigh-Frequency Jet VentilationMacrophages, AlveolarExerciseNoninvasive VentilationRespiratory InsufficiencyVentilator WeaningVentilators, MechanicalVital CapacityBicyclingSpirometryLung Volume MeasurementsHeart RateDogsForced Expiratory VolumeLung ComplianceModels, BiologicalIntubation, IntratrachealTime FactorsHypercapniaWork of BreathingRespiratory TransportInhalationLactic AcidHeliumVentilator-Induced Lung InjuryAir PressureLung InjuryRespiratory Physiological PhenomenaNeonTracheostomyRespiratory Distress Syndrome, NewbornPulmonary SurfactantsVentilators, Negative-PressureMasksAcute Lung InjuryAlveolar ProcessAirway ResistanceOne-Lung VentilationIntensive Care UnitsFluorocarbonsProne PositionLaryngeal MasksIntermittent Positive-Pressure BreathingMaximal Voluntary VentilationPulmonary Alveolar ProteinosisHypoventilationIntensive CareApneaWater Loss, InsensiblePlant TranspirationRespiratory RateFunctional Residual CapacityOxygen Inhalation TherapyLung Diseases, ObstructiveRespiratory MusclesDiaphragmTracheotomyBronchoalveolar Lavage FluidAirway ObstructionAnesthesia, GeneralAdministration, InhalationPressure