Respiratory Distress Syndrome, AdultFetal Organ MaturityRespiratory Distress Syndrome, NewbornAmniotic FluidLungPulmonary SurfactantsHyaline Membrane DiseaseInfant, NewbornRespiration, ArtificialAcute Lung InjurySphingomyelinsPositive-Pressure RespirationSyndromeLung InjuryBarotraumaLung DiseasesTidal VolumeGestational AgeProne PositionPrenatal DiagnosisPulmonary Gas ExchangeHigh-Frequency VentilationInfant, PrematurePregnancyPhosphatidylglycerolsAmniocentesisInfant, Newborn, DiseasesPhosphatidylcholinesPulmonary AlveoliPulmonary Surfactant-Associated Protein BBronchoalveolar Lavage FluidTerm BirthFluorescence PolarizationPulmonary EdemaLung ComplianceRespiratory Dead SpaceVentilator-Induced Lung InjuryRespiratory MechanicsLung NeoplasmsExtracorporeal Membrane OxygenationPregnancy in DiabeticsBlood Gas AnalysisRespiratory InsufficiencyAnimals, NewbornOxygenBiological ProductsInfant, Premature, DiseasesVentilators, MechanicalBronchopulmonary DysplasiaPhospholipidsLung Volume MeasurementsPneumoniaIntensive Care UnitsRespiratory AspirationOxygenators, MembraneExtravascular Lung WaterFatty AlcoholsAPACHEMultiple Organ FailurePulmonary Surfactant-Associated Protein CProspective StudiesPneumothoraxSepsisTreatment OutcomePulmonary Surfactant-Associated ProteinsFatal OutcomePulmonary AtelectasisChromatography, Thin LayerCritical CareRadiography, ThoracicPulmonary CirculationPulmonary Surfactant-Associated Protein APartial PressureAdministration, InhalationIntensive CareIntensive Care Units, NeonatalIntensive Care, NeonatalRetrospective StudiesCarcinoma, Non-Small-Cell LungRespiratory Function TestsLung TransplantationSurface TensionBetamethasoneAcute DiseaseRisk FactorsProteolipidsBronchoalveolar LavageCritical IllnessLung Diseases, InterstitialOxygen Inhalation TherapyTime FactorsAdrenal Cortex HormonesSmoke Inhalation InjuryTuberculosis, MiliaryInfant, Very Low Birth WeightPneumonia, AspirationInfant, Low Birth WeightSeverity of Illness IndexIntubation, IntratrachealInstillation, Drug