BupivacaineAnalgesiaAnalgesia, EpiduralAnesthetics, LocalAnalgesia, ObstetricalAnalgesics, OpioidAnalgesia, Patient-ControlledPain, PostoperativeAnesthesia, SpinalAnesthesia, EpiduralPain MeasurementSufentanilAnesthesia, ObstetricalMorphineNerve BlockAmidesFentanylLidocaineDouble-Blind MethodInjections, SpinalAnesthetics, CombinedAdjuvants, AnesthesiaAnesthesia, CaudalCesarean SectionAnalgesicsMeperidineAnesthesia, LocalPainAnesthesia, GeneralLabor, ObstetricAnesthetics, IntravenousEtidocaineMepivacaineAcupuncture AnalgesiaPreanesthetic MedicationLabor PainTramadolAnesthesia Recovery PeriodAlfentanilPostoperative Nausea and VomitingDose-Response Relationship, DrugAnesthesia, IntravenousReceptors, Opioid, muAnalgesics, Non-NarcoticAmbulatory Surgical ProceduresClonidinePregnancyThoracotomyNaloxoneCarticaineConscious SedationSubarachnoid SpacePropofolInjections, EpiduralMidazolamAdministration, CutaneousKetorolacBrachial PlexusProspective StudiesNitrous OxidePrilocaineDexmedetomidineKetamineAnesthesia, ConductionSensationPain ThresholdHypnotics and SedativesNarcoticsDrug ToleranceStereoisomerismLabor Stage, FirstDrug InteractionsInjections, IntravenousDrug CombinationsNarcotic AntagonistsInfusions, IntravenousHemodynamicsHydromorphoneApgar ScoreTime FactorsAnesthesiaAnesthesia, InhalationAnesthesia, DentalEpidural SpaceEpinephrineFemoral NerveInfusion PumpsPain, IntractableNalbuphineAnestheticsProcaineAnesthetics, InhalationDrug Administration ScheduleReceptors, OpioidInjections, Intra-ArticularAnesthetics, DissociativeInfusions, ParenteralIntraoperative PeriodTolmetinMethyl Ethers