Blood Gas AnalysisCarbon DioxideOxygenAcid-Base ImbalanceGasesPartial PressureCapnographyPulmonary Gas ExchangeBlood Gas Monitoring, TranscutaneousOximetryRespiratory InsufficiencyHepatopulmonary SyndromeRespiratory Dead SpaceRespirationRespiratory Function TestsHypoventilationBlood Specimen CollectionMethemoglobinemiaVentilation-Perfusion RatioAcid-Base EquilibriumOxygen ConsumptionHypercapniaOxyhemoglobinsAnoxiaHydrogen-Ion ConcentrationRespiration, ArtificialOxygen Inhalation TherapyLungAnesthesia, GeneralProspective StudiesPulmonary EmbolismRadiography, ThoracicExercise TestSpirometryHemodynamicsLung DiseasesPulmonary Disease, Chronic ObstructiveBicarbonatesPositive-Pressure RespirationVital CapacityArteriesForced Expiratory VolumeTime FactorsHeart RateAcute DiseaseReproducibility of ResultsBlood PressureObesity Hypoventilation SyndromeSyringesSwineRetrospective StudiesPredictive Value of TestsLung Diseases, ObstructiveTreatment OutcomePoint-of-Care SystemsChromatography, GasPulmonary VentilationMonitoring, PhysiologicGas Chromatography-Mass SpectrometryCardiac OutputNoble GasesDisease Models, AnimalExercise ToleranceSensitivity and SpecificityIntensive CareBreath TestsDyspneaLactic AcidHemoglobinsRespiratory Distress Syndrome, AdultInfant, NewbornGas Poisoning