Spinal PuncturePost-Dural Puncture HeadacheBlood Patch, EpiduralDura MaterPuncturesHeadacheAnesthesia, EpiduralAnalgesia, EpiduralAnesthesia, ObstetricalNeedlesEpidural SpaceAnesthesia, SpinalAnalgesia, ObstetricalPuerperal DisordersBack PainCentral Nervous System Vascular MalformationsPregnancyArteriovenous FistulaSinus Thrombosis, IntracranialCavernous SinusCerebral VeinsMeningeal ArteriesEmbolization, TherapeuticSepsisCecumMyelographyIntracranial HypotensionCerebral AngiographyAtrial SeptumArachnoidCatheterization, PeripheralWounds, PenetratingFoot InjuriesCranial Fossa, AnteriorLarynx, ArtificialCraniotomyCerebrospinal FluidIntracranial Arteriovenous MalformationsLigationMeningitisSubdural EffusionMagnetic Resonance ImagingPolyvinylsLaminectomyTomography, X-Ray ComputedCerebrospinal Fluid PressureSubarachnoid SpaceHemostatic TechniquesJugular VeinsFluoroscopyMeningeal NeoplasmsNeurosurgical ProceduresMeningesPneumocephalusGloves, SurgicalIntracranial HypertensionLumbar VertebraeTreatment OutcomeMeningoceleArteriovenous MalformationsRadiography, InterventionalMeningitis, BacterialMagnetic Resonance AngiographyHematoma, Subdural, IntracranialSpinal Cord DiseasesWound Closure TechniquesSubarachnoid HemorrhageEncephaloceleCatheterizationMeningiomaAngiographyRetrospective StudiesVeinsSkull BasePolyradiculopathyUltrasonography, InterventionalAxillary VeinBlood Specimen CollectionIatrogenic DiseaseSpinal CordPhlebographySpeech, AlaryngealCranial Fossa, PosteriorIntracranial PressureCervical VertebraeSubdural SpaceSpinal Cord CompressionNeckCatheterization, Central VenousDilatation, PathologicTrigeminal Nerve DiseasesTissue AdhesivesExtravasation of Diagnostic and Therapeutic MaterialsDecompression, SurgicalSpinal CanalInjections, EpiduralLumbosacral RegionFemoral ArteryTransverse SinusesCarotid Artery, External