Blood Gas AnalysisCarbon DioxideOxygenAcid-Base ImbalanceGasesPartial PressureCapnographyPulmonary Gas ExchangeBlood Gas Monitoring, TranscutaneousOximetryRespiratory InsufficiencyHepatopulmonary SyndromeRespiratory Dead SpaceRespirationHypoventilationRespiratory Function TestsBlood Specimen CollectionMethemoglobinemiaVentilation-Perfusion RatioAcid-Base EquilibriumOxygen ConsumptionAnoxiaHypercapniaOxyhemoglobinsRespiration, ArtificialHydrogen-Ion ConcentrationOxygen Inhalation TherapyLungAnesthesia, GeneralPulmonary EmbolismRadiography, ThoracicExercise TestLung DiseasesSpirometryPositive-Pressure RespirationHemodynamicsProspective StudiesPulmonary Disease, Chronic ObstructiveBicarbonatesArteriesVital CapacityForced Expiratory VolumeAcute DiseaseHeart RateTime FactorsObesity Hypoventilation SyndromeSyringesBlood PressureSwineLung Diseases, ObstructiveRetrospective StudiesPulmonary VentilationChromatography, GasPoint-of-Care SystemsTreatment OutcomeNoble GasesCardiac OutputGas Chromatography-Mass SpectrometryPredictive Value of TestsExercise ToleranceMonitoring, PhysiologicDisease Models, AnimalIntensive CareMuscle ContractionBreath TestsDyspneaLactic AcidRespiratory Distress Syndrome, AdultGas PoisoningHemoglobins