Shidahara Y
Department of Orthopaedic Surgery, Okayama University Medical School, Japan.
Nihon Seikeigeka Gakkai Zasshi. 1990 May;64(5):392-400.
The cervical and the lumbar vertebrae were analyzed by computed tomography in two groups. One group consisted of the patients with developmental stenosis of the cervical spine (the smallest AP diameter of the cervical spinal canal in the lateral view of X-ray was less than 12 mm) and the other was the control group (the smallest diameter was more than 14 mm). The canal to body ratio of the cross-sectional area (CBR), the modified Jones' "canal to body ratio" (JNS) and the flat index of the vertebral canal (FI) were measured at C4,C5, C6, L4 and L5. The shape of the vertebral canal of L4 and L5 was classified according to Baddeley. In the stenosis group, CBR and JNS were smaller at every measured level and FI was smaller at C4, C5 and C6 compared with the control group, Trefoil canals were found more frequently in the stenosis group. There was a clear relationship between the developmental stenosis of the cervical and the lumbar spinal canal. On treating patients with cervical spondylotic myelopathy, one should consider the possibility of pan-spinal canal stenosis.
对两组患者的颈椎和腰椎进行了计算机断层扫描分析。一组由颈椎发育性狭窄患者组成（X线侧位片上颈椎椎管最小前后径小于12mm），另一组为对照组（最小直径大于14mm）。在C4、C5、C6、L4和L5测量横截面积的椎管与椎体比值（CBR）、改良的琼斯“椎管与椎体比值”（JNS）和椎管扁平指数（FI）。根据巴德利对L4和L5椎管的形状进行分类。在狭窄组中，与对照组相比，各测量水平的CBR和JNS较小，C4、C5和C6处的FI较小，狭窄组中三叶形椎管更为常见。颈椎和腰椎管的发育性狭窄之间存在明显的关系。在治疗脊髓型颈椎病患者时，应考虑全椎管狭窄的可能性。
