轴向负荷装置的制作及其在腰椎管狭窄CT诊断中的应用

Manufacture of the axial loading device and its application in the diagnosis of lumbar spinal stenosis with CT

目的:评估自制轴向负荷装置在腰椎管狭窄CT诊断中的应用价值。方法:应用帆布、踏板秤及松紧扣自制一个简易的轴向负荷装置,对41例经临床及CT检查证实的腰椎管狭窄患者先行常规扫描,然后施加约50%自重行轴向负荷扫描,测量轴向负荷前、后椎管狭窄平面脊膜囊截面积并进行统计学处理。结果:41例患者中共有56个椎管狭窄平面,分别为L3～45个,L4～521个,L5～S130个;其轴向负荷前、后狭窄平面脊膜囊截面积平均值分别为(93.7±4.1)mm2与(82.7±9.3)mm2、(85.2±11.6)mm2与(78.1±16.5)mm2、(84.9±11.0)mm2与(75.7±16.1)mm2,各平面轴向负荷后脊膜囊截面积均缩小,差异有统计学意义。结论:轴向负荷后CT检查能如实地反映椎管狭窄的情况,在腰椎管狭窄的诊断中有独特价值。

Objective： To assess the value of axial loading device in the diagnosis of lumbar spinal stenosis with CT. Methods： To make a simple axial loading device with canvas, pedal scale and strainers. 41 cases of lumbar spinal stenosis who had been confirmed by clinical and CT examination, were given conventional scanning first, and then axial loading scanning with about 50% body weight, the sac cross-sectional area of stenosis plane of the spinal canal was measured, carried out the statistical analysis. Results： 41 cases of patients with spinal stenosis total of 56 planes, L3-4 5 planes, L4-5 21 planes, L5-S1 30 planes; and the sac cross-sectional area before and after axial loading were on average （93.7±4.1） mm2 and （82.7±9.3） mm2, （85.2±11.6） mm2 and （78.1±16.5） mm2, （84.9±11.0） mm2 and （75.7±16.1） mm2, the sac cross-sectional area were reduced after axial loading, there were significant differences. Conclusion： CT examination after the axial loading can accurately reflect the situation of spinal stenosis, and have unique value in the diagnosis of lumbar spinal stenosis.