Blood Gas AnalysisBlood Urea NitrogenCarbon DioxideOxygenAcid-Base ImbalanceGasesPartial PressureCapnographyPulmonary Gas ExchangeBlood Gas Monitoring, TranscutaneousOximetryRespiratory InsufficiencyHepatopulmonary SyndromeRespiratory Dead SpaceRespirationRespiratory Function TestsHypoventilationBlood Specimen CollectionMethemoglobinemiaVentilation-Perfusion RatioAcid-Base EquilibriumOxygen ConsumptionHypercapniaAnoxiaOxyhemoglobinsRespiration, ArtificialHydrogen-Ion ConcentrationSerumOxygen Inhalation TherapyLungAnesthesia, GeneralPulmonary EmbolismProspective StudiesRadiography, ThoracicExercise TestLung DiseasesSpirometryPulmonary Disease, Chronic ObstructiveBicarbonatesPositive-Pressure RespirationHemodynamicsVital CapacityArteriesForced Expiratory VolumeAcute DiseaseTime FactorsHeart RateObesity Hypoventilation SyndromeSyringesSerum AlbuminBlood PressureSwineRetrospective StudiesLung Diseases, ObstructiveChromatography, GasPredictive Value of TestsTreatment OutcomePoint-of-Care SystemsGas Chromatography-Mass SpectrometryPulmonary VentilationDisease Models, AnimalNoble GasesExercise ToleranceMonitoring, PhysiologicCardiac OutputIntensive CareBreath TestsDyspneaSensitivity and SpecificityLactic AcidHemoglobinsRespiratory Distress Syndrome, AdultReproducibility of ResultsSerum Albumin, BovineGas Poisoning