Respiratory Distress Syndrome, AdultRespiratory Distress Syndrome, NewbornRespiration, ArtificialPulmonary SurfactantsAcute Lung InjuryPositive-Pressure RespirationSyndromeBarotraumaInfant, NewbornTidal VolumeProne PositionHigh-Frequency VentilationLungPulmonary Gas ExchangeInfant, PrematureLung InjuryPulmonary Surfactant-Associated Protein BPulmonary AlveoliLung ComplianceRespiratory Dead SpaceBronchoalveolar Lavage FluidExtracorporeal Membrane OxygenationPulmonary EdemaBlood Gas AnalysisRespiratory MechanicsFetal Organ MaturityRespiratory InsufficiencyLung DiseasesVentilator-Induced Lung InjuryBiological ProductsInfant, Premature, DiseasesVentilators, MechanicalGestational AgeBronchopulmonary DysplasiaOxygenIntensive Care UnitsAPACHERespiratory AspirationOxygenators, MembraneFatty AlcoholsMultiple Organ FailureHyaline Membrane DiseasePulmonary Surfactant-Associated Protein CPneumothoraxProspective StudiesSepsisPneumoniaCritical CareTreatment OutcomePulmonary Surfactant-Associated ProteinsAmniotic FluidFatal OutcomeIntensive CarePartial PressurePulmonary AtelectasisInfant, Newborn, DiseasesPregnancyRadiography, ThoracicPulmonary Surfactant-Associated Protein AIntensive Care, NeonatalExtravascular Lung WaterIntensive Care Units, NeonatalRetrospective StudiesBetamethasoneCritical IllnessAdministration, InhalationSurface TensionAcute DiseaseLung Volume MeasurementsPulmonary CirculationRisk FactorsAdrenal Cortex HormonesOxygen Inhalation TherapySmoke Inhalation InjuryTuberculosis, MiliaryProteolipidsPneumonia, AspirationTime FactorsInfant, Very Low Birth WeightSeverity of Illness IndexRespiratory Function TestsIntubationBronchoalveolar LavageEmbolism, FatInfant, Low Birth WeightHemodynamicsNeuromuscular Blocking AgentsLeukomalacia, PeriventricularStress, PsychologicalMetabolic Syndrome XIntubation, IntratrachealVentilator WeaningCapnographyAir PressureRespiratory TherapyInstillation, DrugPhosphatidylglycerolsHospital MortalityPulmonary VentilationDisease Models, Animal