Anesthesia, EpiduralAnesthesia, ConductionAnesthesia, SpinalAnesthesia, GeneralAnesthesia, ObstetricalNerve BlockAnalgesiaAnalgesia, EpiduralAnalgesia, ObstetricalAnesthesiaAnesthesia, LocalLabor PainAnalgesia, Patient-ControlledAnalgesics, OpioidAnesthetics, LocalEpidural AbscessPain, PostoperativeAnesthesia, InhalationAnesthesia, IntravenousBupivacainePain MeasurementLabor, ObstetricInjections, SpinalAnesthesia Recovery PeriodFentanylCesarean SectionAnesthesia, DentalMorphineHematoma, Epidural, SpinalAdjuvants, AnesthesiaAnesthetics, IntravenousAnesthetics, InhalationAnesthetics, CombinedPropofolAcupuncture AnalgesiaInjections, EpiduralAnalgesicsLidocaineNitrous OxideSufentanilMethyl EthersPregnancyAnesthesiologyIsofluraneMeperidinePainKetamineAnesthesia, CaudalAnestheticsMonitoring, IntraoperativeConscious SedationHematomaAmbulatory Surgical ProceduresDouble-Blind MethodLumbar VertebraeHalothanePostoperative Nausea and VomitingPostoperative ComplicationsPreanesthetic MedicationAmidesAnesthesia and AnalgesiaAnesthetics, DissociativeTramadolHypnotics and SedativesPatient SatisfactionAlfentanilUltrasonography, InterventionalAnesthesia, Closed-CircuitTreatment OutcomeMepivacaineAnesthetics, GeneralThiopentalAnalgesics, Non-NarcoticPrilocaineProspective StudiesAnesthesia Department, HospitalXylazinePentobarbitalNaloxoneEnfluraneIntubation, IntratrachealIntraoperative PeriodPain ThresholdIntraoperative ComplicationsKetorolacRandomized Controlled Trials as TopicPiperidinesClonidineFemoral NerveInterpleural AnalgesiaMidazolamDrug ToleranceRetrospective StudiesAnesthesia, IntratrachealBrachial PlexusDose-Response Relationship, DrugReceptors, Opioid, muLabor Stage, FirstDexmedetomidineTime Factors