OximetryOxygenBlood Gas AnalysisBlood Gas Monitoring, TranscutaneousBlood PressureCapnographyPartial PressureAnoxiaCarbon DioxideOxyhemoglobinsMonitoring, IntraoperativeHypoventilationHeart RateMonitoring, PhysiologicNeonatal ScreeningMethemoglobinemiaOxygen Inhalation TherapySpectroscopy, Near-InfraredHemodynamicsOxygen ConsumptionRegional Blood FlowRespirationRetinal VeinCerebrovascular CirculationAnesthesiaSleep Apnea SyndromesForeheadHeart Defects, CongenitalProspective StudiesAnesthesia, GeneralConscious SedationRetinal ArteryBlood Flow VelocityArteriesHypercapniaDye Dilution TechniqueInfant, NewbornElectron Spin Resonance SpectroscopyVascular ResistanceRespiratory InsufficiencyPolysomnographyApneaReproducibility of ResultsRespiration, ArtificialRecovery RoomArterial PressureDeep SedationTime FactorsPulmonary Gas ExchangePlethysmographyHypotension