Blood Gas AnalysisCarbon DioxideOxygenAcid-Base ImbalanceGasesPartial PressureCapnographyPulmonary Gas ExchangeBlood Gas Monitoring, TranscutaneousOximetryRespiratory InsufficiencyHepatopulmonary SyndromeRespiratory Dead SpaceAutoanalysisRespirationBlood Specimen CollectionRespiratory Function TestsHypoventilationMethemoglobinemiaAcid-Base EquilibriumVentilation-Perfusion RatioOxygen ConsumptionHypercapniaAnoxiaOxyhemoglobinsHydrogen-Ion ConcentrationRespiration, ArtificialOxygen Inhalation TherapyLungAnesthesia, GeneralPulmonary EmbolismRadiography, ThoracicExercise TestProspective StudiesLung DiseasesSpirometryBicarbonatesPulmonary Disease, Chronic ObstructivePositive-Pressure RespirationHemodynamicsVital CapacityArteriesPoint-of-Care SystemsForced Expiratory VolumeAcute DiseaseHeart RateTime FactorsObesity Hypoventilation SyndromeSyringesCentrifugationBlood Chemical AnalysisBlood PressureSwineBreath TestsChromatography, GasRetrospective StudiesLung Diseases, ObstructiveGas Chromatography-Mass SpectrometryPredictive Value of TestsPulmonary VentilationMonitoring, PhysiologicReproducibility of ResultsTreatment OutcomeNoble GasesExercise ToleranceCardiac OutputDisease Models, AnimalIntensive CareSensitivity and SpecificityChemistry, ClinicalHemoglobinsLactic AcidHematologyDyspneaQuality ControlRespiratory Distress Syndrome, AdultEvaluation Studies as TopicGas PoisoningNephelometry and Turbidimetry