Oxygen ConsumptionDecompression, SurgicalPartial PressureDecompressionOxygenDecompression SicknessPressureCarbon DioxideBlood PressureBlood Gas AnalysisDivingAtmospheric PressurePulmonary Gas ExchangeReactive Oxygen SpeciesHeliumHydrostatic PressureAnoxiaRespirationNoble GasesEnergy MetabolismHyperbaric OxygenationHeart RateSpinal Cord CompressionHemodynamicsTime FactorsLaminectomyAir PressureTrigeminal NeuralgiaMicrovascular Decompression SurgeryOxygen Inhalation TherapySpinal StenosisNerve Compression SyndromesEmbolism, AirBlood Gas Monitoring, TranscutaneousTidal VolumeTreatment OutcomeDogsArnold-Chiari MalformationSpinal FusionHypocapniaCardiac OutputRegional Blood FlowOximetryHypercapniaCervical VertebraeLactic AcidPolarographyExercise TestGasesExerciseProspective StudiesBlood Pressure DeterminationOxidation-ReductionRespiratory TransportDiskectomy, PercutaneousOxyhemoglobinsCapnographyLumbar VertebraeIntracranial PressureHydrogen-Ion ConcentrationSyringomyeliaCerebrovascular CirculationPhysical ExertionAirAcid-Base EquilibriumAlcohol DrinkingLactatesComplex MixturesHemoglobinsHypertensionNitrogenRespiratory MechanicsHyperventilationBody TemperatureKryptonMyocardiumVascular ResistanceAltitudeModels, BiologicalPerfusionPulmonary VentilationRespiration, ArtificialIntraocular PressureMitochondriaSwineAcclimatizationTransducers, PressureMuscle, SkeletalRats, Sprague-DawleyHyperoxiaDietIsofluraneArgonCoronary CirculationBlood Flow VelocityAtmosphere Exposure ChambersAnalysis of VarianceIntervertebral Disc DisplacementFollow-Up StudiesRetrospective Studies