[Analysis of radiological criteria correlation and clinical manifestation of central lumbosacral spinal stenosis].

OBJECTIVE: to assess the correlation analysis of radiologic criteria referred to central degenerative spinal stenosis and intensity of clinical manifestation. MATERIALS AND METHODS: a retrospective cohort data were collected from 2010 till 2011, 27 patients who underwent surgical treatment of central spinal stenosis in Burdenko Neurosurgical Institute. 16 male and 11 female patients were included in the present study. Mean age of the patients at the time of surgery was 57.9 years. All patients had spinal canal decompression and transpedicular or oblique transcorporal fusion. Stabilization included different types of pedicle screws, including transcutaneous stabilization systems. Interbody fusion was achieved by posterolateral transforaminal approach (TLIF --transforaminal lumbar interbody fusion). 13 cases included combination of interbody fusion and guided oblique lumbar interbody fusion "GO-LIF", which could not be managed without robotic assistance. All patients underwent full preoperative examination. MR image evaluation included: antero-posterior diameter of the spinal canal (mm), interfacet interval (mm), and cross-section area of the spinal canal (mm2). Patients were evaluated by outcome analysis scales: Degenerative Disease Intensity Level (DDIL) and Swiss Spinal Stenosis Score (Zurich Claudication Questionnaire, Brigham spinal stenosis questionnaire). Surgical outcomes were evaluated according to modified classes of Kawabata et al. RESULTS AND DISCUSSION: analysis of our patients group demonstrated absence of correlation between intensity level of degenerative central spinal stenosis based on neurovisualization methods and intensity of its clinical manifestation. Pearson's coefficient of correlation and Spearmen rank correlation for variable which evaluates clinical signs (DDIL in %) and neurovisualization data (antero-posterior diameter of the spinal canal (mm), interfacet interval (mm), and cross-section area of the spinal canal (mm2)) are not significant to zero (p > 0.2).