Spinal StenosisInjections, EpiduralLidocaineAnesthetics, LocalLumbar VertebraeSpinal CordDecompression, SurgicalSpinal CanalLaminectomySpondylolisthesisCarotid StenosisAortic Valve StenosisSpinal 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 VertebraeSteroidsOrthopedic ProceduresFailed Back Surgery SyndromeMagnetic Resonance ImagingSacrumNeurosurgical ProceduresEpidural SpaceCauda EquinaProstheses and Implants