Blood Gas AnalysisOximetryOxygenCarbon DioxidePartial PressureAcid-Base ImbalanceGasesCapnographyBlood Gas Monitoring, TranscutaneousPulmonary Gas ExchangeHypoventilationMethemoglobinemiaRespiratory InsufficiencyHepatopulmonary SyndromeRespirationOxyhemoglobinsAnoxiaRespiratory Dead SpaceRespiratory Function TestsOxygen ConsumptionVentilation-Perfusion RatioOxygen Inhalation TherapyBlood Specimen CollectionAcid-Base EquilibriumHypercapniaRespiration, ArtificialAnesthesia, GeneralProspective StudiesLungHydrogen-Ion ConcentrationPulmonary Disease, Chronic ObstructivePositive-Pressure RespirationSpirometryLung DiseasesPulmonary EmbolismRadiography, ThoracicHemodynamicsExercise TestBicarbonatesMonitoring, PhysiologicVital CapacityForced Expiratory VolumeHeart RateArteriesAcute DiseaseTime FactorsBlood PressureObesity Hypoventilation SyndromeMonitoring, IntraoperativeSyringesRetrospective StudiesPredictive Value of TestsTreatment OutcomeNeonatal ScreeningSwineLung Diseases, ObstructiveInfant, NewbornReproducibility of ResultsChromatography, GasPoint-of-Care SystemsPulmonary VentilationNoble GasesGas Chromatography-Mass SpectrometrySleep Apnea SyndromesExercise ToleranceHemoglobinsCardiac OutputSensitivity and SpecificityDisease Models, AnimalIntensive CareSpectroscopy, Near-InfraredForeheadRetinal VeinBreath TestsHeart Defects, CongenitalDyspneaDye Dilution TechniqueRespiratory MechanicsPolysomnographyAltitudeElectron Spin Resonance SpectroscopyConscious SedationSeverity of Illness IndexRespiratory Distress Syndrome, AdultLactic AcidAnesthesiaGas PoisoningApnea