Liquid VentilationFluorocarbonsPulmonary Gas ExchangeRespiration, ArtificialPulmonary VentilationMeconium Aspiration SyndromeHigh-Frequency VentilationRespiratory Distress Syndrome, AdultHigh-Frequency Jet VentilationLung ComplianceVentilationPositive-Pressure RespirationRespiratory MechanicsLungOleic AcidPulmonary CirculationOxygenLung InjuryBronchoalveolar LavageRespirationCarbon DioxideRespiratory Distress Syndrome, NewbornSwineChemical FractionationHemodynamicsTidal VolumeIntermittent Positive-Pressure VentilationPulmonary SurfactantsHypothermia, InducedNoninvasive VentilationSheepVentilator WeaningChromatography, High Pressure LiquidVentilators, MechanicalIonic LiquidsVentilation-Perfusion RatioChromatography, Liquid