CORRELATIVE STUDY ON FINDINGS OF DYNAMIC MYELOGRAPHY AND SURGICAL OPERATION IN NON-BONY LUMBAR SPINAL-CANAL STENOSIS

The authors performed dynamic lumbar myelography with Omnipaque on 110 patients from 1990 to 1992, of them, 33 cases were diagnosed as non-b ony lumbar spinal canal stenosis according to contrast medium defect s een on the lateral view of the myelogram. All such cases were operated on and their dynamic pathological findings during the operation were recorded to compare with the abnormal findings observed on the myelogr ams, there was a high coincidence rate of 88.7%. The authors believe t hat the fibrous degenerative changes make up tile basis of dural sec c ompression and the dynamic compression in the spinal canal plays a ver y important role in causing the severity of the stenosis. As the dynam ic pathological findings on the myelograms can not be well demonstrate d on CT scanning and MR imaging, the dynamic lumbar myelography should be the method of choice for use in some cases.