Respiratory Distress Syndrome, AdultRespiratory Distress Syndrome, NewbornRespiration, ArtificialPulmonary SurfactantsAcute Lung InjuryPositive-Pressure RespirationSyndromeBarotraumaInfant, NewbornTidal VolumeProne PositionLungHigh-Frequency VentilationPulmonary Gas ExchangeInfant, PrematureLung InjuryPulmonary Surfactant-Associated Protein BChest PainLung CompliancePulmonary AlveoliRespiratory Dead SpaceBronchoalveolar Lavage FluidPulmonary EdemaExtracorporeal Membrane OxygenationBlood Gas AnalysisLung DiseasesRespiratory MechanicsRespiratory InsufficiencyFetal Organ MaturityRadiography, ThoracicVentilator-Induced Lung InjuryBiological ProductsVentilators, MechanicalInfant, Premature, DiseasesOxygenGestational AgeBronchopulmonary DysplasiaIntensive Care UnitsPneumothoraxRespiratory AspirationAPACHEOxygenators, MembraneFatty AlcoholsMultiple Organ FailureHyaline Membrane DiseasePulmonary Surfactant-Associated Protein CPneumoniaProspective StudiesSepsisTreatment OutcomeCritical CareFatal OutcomePulmonary Surfactant-Associated ProteinsAmniotic FluidPulmonary AtelectasisIntensive CarePartial PressureInfant, Newborn, DiseasesPregnancyExtravascular Lung WaterPulmonary Surfactant-Associated Protein AIntensive Care, NeonatalIntensive Care Units, NeonatalRetrospective StudiesLung Volume MeasurementsAcute DiseaseBetamethasoneAdministration, InhalationSurface TensionCritical IllnessPulmonary CirculationAdrenal Cortex HormonesOxygen Inhalation TherapyPneumonia, AspirationSmoke Inhalation InjuryTuberculosis, MiliaryRespiratory Function TestsProteolipidsRisk FactorsTime FactorsInfant, Very Low Birth WeightIntubationThoracic InjuriesBronchoalveolar LavageSeverity of Illness IndexTomography, X-Ray ComputedRespiratory TherapyHemodynamicsIntubation, IntratrachealEmbolism, FatInfant, Low Birth WeightFlail ChestNeuromuscular Blocking AgentsLeukomalacia, PeriventricularAir PressureVentilator WeaningStress, PsychologicalChest TubesCapnographyInstillation, Drug