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Objective: lumbar spinal stenosis (lumbar spinal stenosis, LSS) is the center of the lumbar spinal canal, lateral recess and intervertebral foramen diameter is reduced as a result of a class of diseases. Clinical mismatch between the part of the patient imaging spinal stenosis and clinical symptoms, imaging stenosis, the clinical symptoms are not typical or lighter; while some patients have significant symptoms of spinal stenosis, but imaging studies can not confirm the diagnosis, clinical symptoms and imaging discrepancies need to be resolved. Domestic and foreign scholars correlation between imaging findings and clinical symptoms of patients with lumbar spinal stenosis, the study found CT severity of spinal stenosis or dural sac cross-sectional area of ??clinical symptoms there is no statistically correlation. Spinal stenosis include not only the central spinal stenosis, side spinal lesions can also cause symptoms. Low back pain and intermittent claudication is the main clinical symptoms of lumbar spinal stenosis, the main cause of the above symptoms are mostly due to nerve root compression caused by ischemia. We initially speculated that lower extremity pain symptoms or patients with intermittent claudication, imaging prompt central spinal canal stenosis, the generation of symptoms often associated with abnormalities of nerve root canal, the study by MRI studies in patients with central spinal canal and nerve root canal the changes of basis with low back pain, leg pain and intermittent claudication related imaging indicators to further determine the factors that cause lesions and clinical surgery. Materials and methods: June 2005 - 2007 in our hospital surgery, patients with complete imaging data and clinical assessment of 144 patients (case group, A group) and no lumbar spinal stenosis in 40 patients ( control group, group B), each patient underwent lumbar MRI plain scan, to each gap three; sagittal plain MRI scan, the average side three, to observe as much as possible to clear the intervertebral foramen prevail. \sagittal diameter of the lateral recess, L3 / 4, L4 / 5, L5/S1 three lower lumbar intervertebral foramen vertical diameter, diameter and area. ODI and VAS scores of cases of 144 patients to assess the degree of pain, record the patients claudication distance. A group and B group indicators using two sample T-test case group disability index (ODI) and the patient's age, the number of segmental lesions, height, weight analysis, case group imaging measure clinical multiple correlation analysis between the symptom index. Results: The case group and control group compared to the spinal area, dural sac area, the area of ??the spinal canal / vertebral area of ??the dural sac area / spinal area, lateral recess sagittal diameter, sagittal diameter of the lower lumbar intervertebral foramen, area compared with control group with significant difference, P lt; 0.05. The case group disability index (ODI) with age, the number of segmental lesions, height, weight, there is no correlation, positive correlation between low back pain and leg pain VAS score and the number of diseased segment. Multiple correlation analysis: (1) area of ??the spinal canal, dural sac area, spinal / vertebral body ratio of patients with low back pain, the degree of correlation, L3, L4 dural sac area change significantly associated with low back pain, the correlation coefficients were - 0.3 and -0.278 (2) leg pain VAS score and segmental lesions in patients with lateral recess between the obvious correlation, the correlation coefficient of -0.195 and -0.205, and intervertebral foramen vertical diameter, sagittal diameter and intervertebral foramen there is no significant correlation between the area and the degree of leg pain. (3) claudication distance and various measure correlation studies suggest a positive correlation between the sagittal diameter in patients with lower extremity claudication distance lateral recess, a correlation coefficient of 0.198-0.25. The intervertebral foramen sagittal diameter of patients with lower extremity claudication distance between the negatively correlated with a correlation coefficient of -0.24. (4) ODI with all imaging measure no obvious correlation, L4 / 5 vertebral gap ratio of dural sac and spinal ODI, R = -0.172, P = 0.045 lt; 0.05. Conclusion: The patients with lumbar spinal stenosis were the main symptoms of intermittent claudication, intermittent claudication distance and lateral recess stenosis is a positive correlation, negative correlation with the between transforaminal sagittal diameter; symptoms of low back pain and lesion segments there is a positive correlated with the spinal area there is a negative correlation in the L3 / 4, L4 / 5 segments of the dural sac area is negatively correlated; patients with lumbar spinal stenosis leg pain symptoms with lateral recess stenosis was positively correlated with intervertebral the hole longitudinal diameter, sagittal diameter and area there is no significant correlation; obvious should be observed in patients with nerve root canal central spinal stenosis is abnormal, provide the basis for guiding clinical surgery.
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