腰骶神经根管的连续断层与CT对照观察

目的 :为临床诊断腰椎管狭窄症提供腰骶神经根管的断层解剖学及CT资料。材料和方法 :在 3 0例成人脊柱横断层标本和 3 6例成人脊柱CT图像上 ,选取脊柱L3～S1节段 ,并将各节段分别分为A、B、C三个区段 ,观测其神经根管及有关数据。结果 :在A区段 ,各神经根的矢径由L3～S1逐渐增大 ;在B区段 ,神经根的行程靠近黄韧带 ;在C区段 ,神经根的行程靠近椎间盘。结论 :(1 )侧隐窝狭窄的判断标准应依腰骶节段不同而异 ;(2 )根管狭窄症的发生率可随L3～S1而增大。

Comparing observation by continuous section and CT image of lumbosacral nerve canal

Objective:To provide sectional anatomical basis and CT image information of the lumbosacral nerve canal for the clinical diagnosis of lumbar spinal stenosis. Methods:The L 3-S 1 segments of the spinal column were selected on serial transverse from 30 adult cadaver and 36 adult CT scan images,each segments was classified into A,B and C zones. The nerve canal and related structures were observed and measured. Results:In zone A,the sagittal diameter of the nerve roots increased gradually from L 3-S 1. In zone B,the situation of the nerve root was very close to yellow ligament. In Zone C,the situation of the nerve root was very close to intervertebral disc. Conclusion:(1)The standard to evaluate lateral stenosis varies from the different lumbosacral segment.(2)The incidence of lumbar spinal stenosis increases gradually from L 3-S 1.