CraniotomyElectrodesElectrodes, ImplantedNeurosurgical ProceduresPneumocephalusIon-Selective ElectrodesFrontal BoneHematoma, Subdural, AcuteElectrochemistryTrephiningSubdural SpaceHead Injuries, PenetratingBrain NeoplasmsIntracranial AneurysmElectrochemical TechniquesDura MaterHematoma, SubduralDelayed Emergence from AnesthesiaSurgical Fixation DevicesMeningeal NeoplasmsSupratentorial NeoplasmsStereotaxic TechniquesTomography, X-Ray ComputedMicrosurgeryFrontal SinusPostoperative ComplicationsMeningiomaTemporal BoneArachnoid CystsMicroelectrodesMagnetic Resonance ImagingGlasgow Coma ScaleHematoma, Epidural, CranialHematoma, Subdural, ChronicCerebrospinal Fluid RhinorrheaEquipment DesignNeurosurgerySurgical InstrumentsPotentiometryFourth VentricleCranial Fossa, AnteriorTreatment OutcomeSurgical FlapsBrain AbscessTime FactorsFluorocarbon PolymersHematoceleGraphiteBiosensing TechniquesVentriculostomyMonitoring, IntraoperativeCerebellar DiseasesConscious SedationRetrospective StudiesBrain InjuriesElectroencephalographySkull BaseConsciousness MonitorsCerebral AngiographySkull FracturesElectric StimulationAneurysm, RupturedCranial Nerve NeoplasmsDecompression, SurgicalSubarachnoid HemorrhageGoldAnesthesiaSkull Base NeoplasmsSurgical Procedures, Minimally InvasiveCerebral VeinsIntracranial HemorrhagesBrain DiseasesNeuroendoscopyCochlear ImplantsConductometryCochlear ImplantationNeuronavigationSkullCraniopharyngiomaElectric ImpedanceAnesthesia, GeneralEnzymes, ImmobilizedOrbitBrainAnterior Cerebral ArteryCranial Fossa, MiddleIntracranial Hemorrhage, HypertensivePropofolEpilepsyTemporal Arteries