Conscious SedationAnalgesiaDeep SedationAnalgesia, EpiduralAnalgesia, ObstetricalHypnotics and SedativesAnalgesia, Patient-ControlledAnalgesics, OpioidPain, PostoperativeMidazolamFentanylPain MeasurementMorphineAnesthesia, DentalPropofolBupivacaineAnesthetics, LocalAnalgesicsMeperidineAcupuncture AnalgesiaSufentanilAnesthesia, EpiduralDexmedetomidinePainAnesthetics, IntravenousAnesthesia Recovery PeriodPreanesthetic MedicationLabor PainDouble-Blind MethodNerve BlockAnesthesia, GeneralInjections, SpinalAnesthesia, IntravenousKetamineAnesthetics, CombinedAnesthesia, SpinalAnesthesia, LocalAnesthesia, ObstetricalAdjuvants, AnesthesiaTramadolAlfentanilAnalgesics, Non-NarcoticLabor, ObstetricChloral HydrateAnesthetics, DissociativePostoperative Nausea and VomitingDental AnxietyClonidineAmidesNitrous OxideConsciousness MonitorsButorphanolLidocaineAnesthesia, ConductionProspective StudiesNaloxoneDroperidolHydroxyzineAmbulatory Surgical ProceduresDrug ToleranceDiazepamCesarean SectionPain ThresholdHydromorphoneRespiration, ArtificialKetorolacInterpleural AnalgesiaPiperidinesPain ManagementAnesthesia, CaudalReceptors, Opioid, muPirinitramideNalbuphinePostoperative CareAnesthesiaInfusions, IntravenousDose-Response Relationship, DrugTooth ExtractionIntensive CareIntensive Care UnitsLabor Stage, FirstPruritusConsciousnessReceptors, OpioidMedetomidinePregnancyPatient SatisfactionAnesthesia and AnalgesiaAnti-Anxiety AgentsAdrenergic alpha-AgonistsMonitoring, IntraoperativePain, IntractableNarcotic AntagonistsFemoral NerveInjections, IntravenousNurse AnesthetistsAnesthesiologyElectroencephalographyLorazepamRespiration