SufentanilCraniotomyPropofolAnesthetics, IntravenousFentanylAnalgesia, ObstetricalAnalgesics, OpioidAnalgesia, EpiduralAlfentanilAnesthetics, CombinedBupivacaineAnestheticsHypnotics and SedativesInjections, SpinalConscious SedationNeurosurgical ProceduresAnesthesia Recovery PeriodAnesthesia, GeneralAnesthetics, LocalPneumocephalusAnesthesia, SpinalPreanesthetic MedicationAnesthesia, IntravenousAdjuvants, AnesthesiaDouble-Blind MethodFrontal BoneMidazolamHematoma, Subdural, AcuteMonitoring, IntraoperativeAnesthesiaPain, PostoperativeLabor, ObstetricTrephiningPiperidinesAnesthetics, InhalationConsciousness MonitorsMethyl EthersIsofluraneLabor Stage, FirstElectroencephalographyDelayed Emergence from AnesthesiaAnesthesia, ObstetricalHead Injuries, PenetratingInfusions, IntravenousBrain NeoplasmsHematoma, SubduralAnalgesia, Patient-ControlledIntracranial AneurysmSupratentorial NeoplasmsNitrous OxideDura MaterSurgical Fixation DevicesMeningeal NeoplasmsAnalgesiaFrontal SinusThiopentalMeningiomaArachnoid CystsSubarachnoid SpaceSubdural SpaceProspective StudiesMicrosurgeryConsciousnessIntracranial PressureKetamineAmidesPruritusDose-Response Relationship, DrugIntubation, IntratrachealAnesthesia, EpiduralPain MeasurementGlasgow Coma ScalePostoperative ComplicationsHematoma, Epidural, CranialTomography, X-Ray ComputedPostoperative Nausea and VomitingHematoma, Subdural, ChronicDeep Sedation