Spinal StenosisLumbar VertebraeSpinal CordDecompression, SurgicalSpinal CanalLaminectomySpondylolisthesisCarotid StenosisAortic Valve StenosisInjections, EpiduralSpinal Cord InjuriesRadiculopathyLigamentum FlavumSpinal FusionCoronary StenosisLumbosacral RegionIntervertebral Disc DisplacementSpinal DiseasesSciaticaTracheal StenosisSpinal Nerve RootsSpinal Cord CompressionPolyradiculopathyMyelographyLow Back PainIntermittent ClaudicationSpondylosisPyloric StenosisPain MeasurementTreatment OutcomeMitral Valve StenosisDisability EvaluationConstriction, PathologicPulmonary Valve StenosisBack PainInjections, SpinalCervical VertebraeSteroidsAnesthetics, LocalOrthopedic ProceduresFailed Back Surgery SyndromeMagnetic Resonance ImagingSacrumNeurosurgical ProceduresEpidural SpaceCauda EquinaProstheses and ImplantsSpineTissue AdhesionsFollow-Up StudiesSpinal NervesProspective StudiesSpinal Cord DiseasesDura MaterAnesthesia, SpinalFluoroscopySurgical Procedures, Minimally InvasiveRetrospective StudiesSeverity of Illness IndexTomography, X-Ray ComputedSpinal Cord NeoplasmsChronic PainSaline Solution, HypertonicInternal FixatorsPostoperative ComplicationsThoracic VertebraeBetamethasoneSpinal NeoplasmsIntervertebral Disc DegenerationPainNerve Compression SyndromesRenal Artery ObstructionRecovery of FunctionOrthopedic Fixation DevicesTriamcinoloneAortic Stenosis, SubvalvularAchondroplasiaDiskectomyOsteoarthritis, SpineDiagnostic Techniques, NeurologicalAortic Stenosis, SupravalvularPost-Dural Puncture HeadacheLidocaineSpinal OsteophytosisLipomatosisTime FactorsWalkingIntervertebral DiscStentsCoronary AngiographyZygapophyseal JointOutcome Assessment (Health Care)Carotid Artery, InternalPredictive Value of TestsLordosisEndarterectomy, CarotidSpinal FracturesProsthesis ImplantationSpinal InjuriesAngioplasty, Balloon