Respiratory Distress Syndrome, AdultRespiratory Distress Syndrome, NewbornRespiration, ArtificialPulmonary SurfactantsPositive-Pressure RespirationAcute Lung InjurySyndromeBarotraumaTidal VolumeInfant, NewbornPressureProne PositionHigh-Frequency VentilationLungPulmonary Gas ExchangeInfant, PrematureLung InjuryPulmonary Surfactant-Associated Protein BBlood PressureLung CompliancePulmonary AlveoliRespiratory Dead SpacePulmonary EdemaBronchoalveolar Lavage FluidExtracorporeal Membrane OxygenationBlood Gas AnalysisRespiratory MechanicsRespiratory InsufficiencyFetal Organ MaturityLung DiseasesVentilator-Induced Lung InjuryOxygenBiological ProductsVentilators, MechanicalInfant, Premature, DiseasesGestational AgeBronchopulmonary DysplasiaIntensive Care UnitsRespiratory AspirationOxygenators, MembraneAPACHEFatty AlcoholsMultiple Organ FailureProspective StudiesHyaline Membrane DiseasePulmonary Surfactant-Associated Protein CPneumothoraxSepsisPneumoniaTreatment OutcomeCritical CarePulmonary Surfactant-Associated ProteinsAmniotic FluidAir PressureFatal OutcomeIntensive CarePulmonary AtelectasisPregnancyPartial PressureInfant, Newborn, DiseasesPulmonary Surfactant-Associated Protein ARadiography, ThoracicExtravascular Lung WaterIntensive Care, NeonatalHemodynamicsIntensive Care Units, NeonatalLung Volume MeasurementsSurface TensionBetamethasoneRetrospective StudiesAcute DiseaseAdministration, InhalationTime FactorsCritical IllnessPulmonary CirculationOxygen Inhalation TherapyHydrostatic PressureAdrenal Cortex HormonesPneumonia, AspirationSmoke Inhalation InjuryProteolipidsTuberculosis, MiliaryRespiratory Function TestsInfant, Very Low Birth WeightRisk FactorsSeverity of Illness IndexIntubation, IntratrachealIntubationBronchoalveolar LavageContinuous Positive Airway PressureDisease Models, AnimalInfant, Low Birth WeightEmbolism, FatStress, PsychologicalVentilator WeaningNeuromuscular Blocking AgentsPulmonary VentilationCarbon DioxideCapnographyLeukomalacia, Periventricular