CraniotomyPropofolAnesthetics, IntravenousExtracorporeal Membrane OxygenationOxygenNeurosurgical ProceduresPneumocephalusConscious SedationHypnotics and SedativesFrontal BoneHematoma, Subdural, AcuteMonitoring, IntraoperativeAnesthesia, GeneralSpectroscopy, Near-InfraredTrephiningConsciousness MonitorsOxygen ConsumptionPartial PressureMagnetic Resonance ImagingAnesthesiaDelayed Emergence from AnesthesiaBrain NeoplasmsHead Injuries, PenetratingFentanylAnesthetics, CombinedHematoma, SubduralIntracranial AneurysmSupratentorial NeoplasmsAnesthesia Recovery PeriodDura MaterSurgical Fixation DevicesOxyhemoglobinsMeningeal NeoplasmsHyperbaric OxygenationFrontal SinusOximetryAnesthetics, InhalationThiopentalMethyl EthersMeningiomaArachnoid CystsSubdural SpaceMicrosurgeryTomography, X-Ray ComputedGlasgow Coma ScaleElectroencephalographyCerebrovascular CirculationAlfentanilHematoma, Epidural, CranialIsofluraneHematoma, Subdural, ChronicPostoperative ComplicationsDeep SedationCerebrospinal Fluid RhinorrheaTemporal BoneBrainMidazolamCranial Fossa, AnteriorFourth VentricleCerebral VeinsStereotaxic TechniquesHemoglobinsBrain InjuriesBrain AbscessNeurosurgerySurgical FlapsHematoceleEtomidatePiperidinesSurgical InstrumentsHemodynamicsAnoxiaMethohexitalBlood Gas AnalysisRespiratory InsufficiencyCerebellar DiseasesRespiration, ArtificialCarbon DioxidePulmonary Gas ExchangeAnesthetics, GeneralVentriculostomySkull BaseAnestheticsSubarachnoid HemorrhageTreatment OutcomeRespiratory Distress Syndrome, AdultCranial Nerve NeoplasmsSkull FracturesOxygenators, MembraneTime FactorsCerebral AngiographyAneurysm, RupturedProspective StudiesBrain DiseasesSkull Base NeoplasmsNitrous OxideConsciousnessDecompression, SurgicalIntracranial HemorrhagesDose-Response Relationship, Drug