PropofolAnesthetics, IntravenousHypnotics and SedativesConscious SedationAnesthetics, CombinedAnesthesia Recovery PeriodThiopentalAnesthetics, InhalationMethyl EthersAlfentanilAnesthesia, GeneralDeep SedationMonitoring, IntraoperativeMidazolamEtomidateMethohexitalFentanylConsciousness MonitorsAnesthetics, GeneralElectroencephalographyAnestheticsAnesthesiaIsofluraneNitrous OxideConsciousnessPiperidinesDose-Response Relationship, DrugInfusions, IntravenousKetamineAnesthetics, DissociativeUnconsciousnessAdjuvants, AnesthesiaEmulsionsInfusion PumpsAmbulatory Surgical ProceduresPreanesthetic MedicationAnesthesia, InhalationIntubation, Intratracheal