AnalgesiaAnalgesia, EpiduralSpinal CordAnesthesia, GeneralAnalgesia, ObstetricalAnesthesiaAnesthesia, SpinalAnesthesia, EpiduralAnesthesia, LocalAnalgesia, Patient-ControlledSpinal Cord InjuriesAnesthesia, ConductionAnesthesia, ObstetricalAnesthesia, InhalationAnesthesia, IntravenousAnalgesics, OpioidAnesthetics, LocalPain, PostoperativeBupivacaineInjections, SpinalPain MeasurementFentanylAnesthesia Recovery PeriodMorphineAnesthesia, DentalAdjuvants, AnesthesiaNerve BlockAnalgesicsAnesthetics, IntravenousAnesthetics, InhalationAnesthetics, CombinedPropofolAcupuncture AnalgesiaPainLidocaineSufentanilNitrous OxideSpinal NervesMethyl EthersIsofluraneAnesthesiologyMeperidineSpinal Cord DiseasesSpinal Nerve RootsMonitoring, IntraoperativeKetamineAnestheticsAnesthesia, CaudalCesarean SectionLabor PainSpinal Cord NeoplasmsSpinal DiseasesSpinal CanalConscious SedationDouble-Blind MethodSpinal Cord CompressionAmbulatory Surgical ProceduresSpinal NeoplasmsAmidesHalothanePostoperative Nausea and VomitingPreanesthetic MedicationAnesthesia and AnalgesiaLabor, ObstetricSpinal FusionAnesthetics, DissociativeSpinal StenosisHypnotics and SedativesAlfentanilTramadolMepivacaineAnalgesics, Non-NarcoticAnesthesia, Closed-CircuitPain ThresholdNaloxoneAnesthetics, GeneralProspective StudiesThiopentalPrilocaineRats, Sprague-DawleySpinal InjuriesTime FactorsPentobarbitalGanglia, SpinalClonidineAnesthesia Department, HospitalXylazineHyperalgesiaMuscular Atrophy, SpinalIntraoperative ComplicationsPregnancyIntraoperative PeriodDose-Response Relationship, DrugKetorolacDrug ToleranceSpinal Cord IschemiaPiperidinesEnfluraneIntubation, IntratrachealFemoral Nerve