Spinal StenosisLumbar VertebraeSpinal CordDecompression, SurgicalSpinal CanalLaminectomySpondylolisthesisCarotid StenosisAortic Valve StenosisInjections, EpiduralSpinal Cord InjuriesRadiculopathyLigamentum FlavumSpinal FusionLumbosacral RegionCoronary StenosisIntervertebral Disc DisplacementSpinal DiseasesSciaticaSpinal Nerve RootsTracheal StenosisSpinal Cord CompressionPolyradiculopathyMyelographyLow Back PainIntermittent ClaudicationSpondylosisPyloric StenosisPain MeasurementTreatment OutcomeMitral Valve StenosisConstriction, PathologicDisability EvaluationPulmonary Valve StenosisNuclear LaminaCervical VertebraeInjections, SpinalBack PainSteroidsAnesthetics, LocalOrthopedic ProceduresMagnetic Resonance ImagingFailed Back Surgery SyndromeSacrumNeurosurgical ProceduresEpidural SpaceCauda EquinaProstheses and ImplantsSpineFollow-Up StudiesTissue AdhesionsSpinal NervesProspective StudiesSpinal Cord DiseasesDura MaterAnesthesia, SpinalFluoroscopySurgical Procedures, Minimally InvasiveRetrospective StudiesSeverity of Illness IndexTomography, X-Ray ComputedSpinal Cord NeoplasmsChronic PainSaline Solution, HypertonicInternal FixatorsThoracic VertebraePostoperative ComplicationsPainSpinal NeoplasmsBetamethasoneIntervertebral Disc DegenerationNerve Compression SyndromesRenal Artery ObstructionRecovery of FunctionOrthopedic Fixation DevicesTriamcinoloneTime FactorsAortic Stenosis, SubvalvularAchondroplasiaDiskectomyOsteoarthritis, SpineDiagnostic Techniques, NeurologicalAortic Stenosis, SupravalvularPost-Dural Puncture HeadacheLidocaineSpinal OsteophytosisLipomatosisWalkingIntervertebral DiscStentsCoronary AngiographyZygapophyseal JointOutcome Assessment (Health Care)Carotid Artery, InternalPosterior Horn CellsPredictive Value of TestsSpinal FracturesLordosisEndarterectomy, CarotidAngioplasty, Balloon