Anesthesia, SpinalAnesthesia, GeneralAnesthesia, ObstetricalAnesthesiaAnesthesia, EpiduralAnesthesia, LocalBupivacaineAnesthetics, LocalAnesthesia, ConductionSpinal CordAnesthesia, InhalationCesarean SectionAnesthesia, IntravenousAnesthesia Recovery PeriodAdjuvants, AnesthesiaEphedrineAdministration, InhalationLidocaineAnesthesia, DentalAmbulatory Surgical ProceduresSpinal Cord InjuriesAnesthetics, InhalationHypotensionInhalation ExposureAnesthetics, IntravenousAnesthetics, CombinedSurgical Procedures, MinorPropofolTetracaineMonitoring, IntraoperativeInjections, SpinalNerve BlockSurgical Procedures, OperativeMepivacaineFentanylPain, PostoperativePrilocaineSpecific GravityIntraoperative ComplicationsIsofluraneAnesthesiologyAnestheticsMethyl EthersSmoke Inhalation InjuryNitrous OxideDouble-Blind MethodBurns, InhalationProspective StudiesPreanesthetic MedicationPostoperative ComplicationsConscious SedationSensationCarticaineHalothaneTime FactorsPostoperative Nausea and VomitingInhalationKetaminePost-Dural Puncture HeadacheSurgical Procedures, ElectiveShiveringSpinal PunctureAnalgesics, OpioidHernia, InguinalPregnancySufentanilTreatment OutcomePain MeasurementSpinal Nerve RootsIntraoperative PeriodAnesthesia, Closed-CircuitIsotonic SolutionsHemodynamicsFemoral NerveAmidesAnesthetics, GeneralMidazolamOrthopedic ProceduresPlasma SubstitutesThiopentalHydroxyethyl Starch DerivativesAnesthesia, CaudalIntraoperative CareRetrospective StudiesHeart RateIntubation, IntratrachealHypnotics and SedativesPostoperative PeriodAnesthetics, DissociativeBlood PressureSubarachnoid SpaceNeedlesEnfluraneConsciousnessSpinal NervesMorphinePentobarbitalSpinal Cord DiseasesAnesthesia Department, HospitalLumbosacral Region