High-Frequency VentilationHigh-Frequency Jet VentilationPulmonary VentilationRespiration, ArtificialLungVentilationRespirationVentilation-Perfusion RatioTidal VolumePositive-Pressure RespirationPulmonary Gas ExchangeOne-Lung VentilationRespiratory MechanicsIntermittent Positive-Pressure VentilationCarbon DioxideIntubation, IntratrachealThoracic Surgical ProceduresLung Volume MeasurementsHypoventilationHeliumAlligators and CrocodilesNoninvasive VentilationVentilator WeaningOxygenXenonVentilators, MechanicalTurtlesTechnetium Tc 99m PentetateHypergravityTomographyLung DiseasesRana catesbeianaXenon RadioisotopesMetamorphosis, BiologicalSupine PositionRespiratory Distress Syndrome, AdultLung Injury