Spinal StenosisLaminectomyLumbar VertebraeDecompression, SurgicalSpinal CanalSpinal CordSpinal Cord CompressionSpondylolisthesisLigamentum FlavumSpinal FusionRadiculopathySpinal Cord InjuriesIntervertebral Disc DisplacementLumbosacral RegionCarotid StenosisSpinal DiseasesAortic Valve StenosisCervical VertebraeInjections, EpiduralMyelographySpinal Nerve RootsEpidural SpaceSciaticaDura MaterCauda EquinaThoracic VertebraeSpinal Cord DiseasesPolyradiculopathyCoronary StenosisSpinal Cord NeoplasmsSacrumFailed Back Surgery SyndromeSpondylosisSpinal NeoplasmsTreatment OutcomeLow Back PainSpinal OsteophytosisTracheal StenosisBack PainNeurosurgical ProceduresSpineMagnetic Resonance ImagingTissue AdhesionsPain MeasurementDisability EvaluationArachnoiditisInternal FixatorsIntermittent ClaudicationPyloric StenosisOrthopedic ProceduresDiskectomyMitral Valve StenosisConstriction, PathologicPulmonary Valve StenosisPostoperative ComplicationsHematoma, Epidural, SpinalInjections, SpinalIntervertebral Disc DegenerationSteroidsFollow-Up StudiesAnesthetics, LocalRetrospective StudiesNerve Compression SyndromesSurgical Procedures, Minimally InvasiveTomography, X-Ray ComputedProspective StudiesParaplegiaProstheses and ImplantsZygapophyseal JointCervical AtlasLordosisOssification of Posterior Longitudinal LigamentSpinal NervesIntervertebral DiscRecovery of FunctionParaparesisAnesthesia, SpinalFluoroscopySeverity of Illness IndexOssification, HeterotopicSpinal FracturesChronic PainSyringomyeliaTorsion, MechanicalSaline Solution, HypertonicWeight-BearingBetamethasoneEpidural AbscessKyphosisTuberculosis, SpinalBiomechanical PhenomenaPainRenal Artery ObstructionTime FactorsOrthopedic Fixation DevicesTriamcinoloneAortic Stenosis, SubvalvularJoint InstabilityAchondroplasiaLongitudinal Ligaments