CraniotomyPropofolOxygenAnesthetics, IntravenousOxygen ConsumptionReactive Oxygen SpeciesNeurosurgical ProceduresPneumocephalusConscious SedationHypnotics and SedativesFrontal BoneHematoma, Subdural, AcuteTrephiningAnesthesia, GeneralConsciousness MonitorsMonitoring, IntraoperativeDelayed Emergence from AnesthesiaHead Injuries, PenetratingBrain NeoplasmsAnesthetics, CombinedAnesthesia Recovery PeriodFentanylHematoma, SubduralSupratentorial NeoplasmsIntracranial AneurysmAnesthesiaDura MaterSurgical Fixation DevicesMeningeal NeoplasmsThiopentalFrontal SinusAnesthetics, InhalationOxygen Inhalation TherapyMeningiomaArachnoid CystsMethyl EthersSubdural SpaceMicrosurgerySinglet OxygenGlasgow Coma ScaleAlfentanilTomography, X-Ray ComputedHematoma, Epidural, CranialIsofluraneElectroencephalographyDeep SedationHematoma, Subdural, ChronicCerebrospinal Fluid RhinorrheaTemporal BoneMagnetic Resonance ImagingMidazolamCranial Fossa, AnteriorFourth VentriclePostoperative ComplicationsStereotaxic TechniquesBrain AbscessPiperidinesNeurosurgeryEtomidateHematoceleSurgical InstrumentsMethohexitalBrain InjuriesCerebellar DiseasesAnesthetics, GeneralSurgical FlapsVentriculostomyNitrous OxideSkull BaseCranial Nerve NeoplasmsSkull FracturesAnestheticsSubarachnoid HemorrhageCerebral AngiographyDose-Response Relationship, DrugAneurysm, RupturedCerebral VeinsSkull Base NeoplasmsDecompression, SurgicalBrainIntracranial HemorrhagesOxygen IsotopesBrain DiseasesCraniopharyngiomaTime FactorsConsciousnessAnterior Cerebral ArteryOrbitPartial PressureSkullCranial Fossa, MiddleNeuroendoscopyIntracranial Hemorrhage, HypertensiveInfusions, Intravenous