Asialoglycoprotein ReceptorAnesthetics, LocalPainPain, PostoperativeAnesthesia, SpinalAnalgesia, EpiduralPain MeasurementAnalgesia, ObstetricalAmidesAnesthesia, EpiduralPain ManagementNerve BlockChronic PainAnesthesia, ObstetricalLidocainePain ThresholdAnesthesia, CaudalEtidocaineAnesthesia, LocalLow Back PainBack PainDouble-Blind MethodPain, IntractableFentanylAnalgesics, OpioidSufentanilAnesthetics, CombinedInjections, SpinalAbdominal PainNeck PainAdjuvants, AnesthesiaMepivacaineAnalgesiaCesarean SectionPelvic PainPain PerceptionCarticaineFacial PainAcute PainPain, ReferredMorphineStereoisomerismAnalgesicsSensationAnalgesia, Patient-ControlledShoulder PainSubarachnoid SpaceMusculoskeletal PainNociceptive PainInjections, EpiduralDose-Response Relationship, DrugBrachial PlexusLabor, ObstetricPrilocaineAmbulatory Surgical ProceduresLabor PainPregnancyAnalgesics, Non-NarcoticProspective StudiesProcaineTramadolThoracotomyInjections, Intra-ArticularTime FactorsHernia, InguinalNeuralgiaEpinephrineClonidineDrug CombinationsPreanesthetic MedicationSpecific GravitySciatic NerveAnesthesia Recovery Period