OximetryCatheters, IndwellingCathetersOxygenCatheterizationCatheterization, Central VenousBlood Gas Monitoring, TranscutaneousCentral Venous CathetersCardiac CathetersEquipment DesignCatheterization, PeripheralUrinary CatheterizationMonitoring, IntraoperativeEquipment FailureOxyhemoglobinsCapnographySpectroscopy, Near-InfraredNeonatal ScreeningMonitoring, PhysiologicUrinary CathetersAnoxiaHypoventilationCatheter-Related InfectionsForeheadProspective StudiesOxygen Inhalation TherapyMethemoglobinemiaBlood Gas AnalysisReproducibility of ResultsHeart Defects, CongenitalRetinal VeinSleep Apnea SyndromesTime FactorsMicroscopy, InterferenceInfant, NewbornPhotometryPartial PressureDye Dilution TechniqueConscious SedationTreatment OutcomeCatheterization, Swan-GanzSensitivity and SpecificityElectron Spin Resonance SpectroscopyOxygen ConsumptionForeign-Body MigrationColorEquipment Failure AnalysisRecovery RoomDeep SedationPolysomnographyCardiac Catheterization