Etiology of Cervical Myelopathy Induced by Ossification of the Posterior Longitudinal Ligament Determining the Responsible Level of OPLL Myelopathy by Correlating Static Compression and Dynamic Factors
Etiology of Cervical Myelopathy Induced by Ossification of the Posterior Longitudinal Ligament Determining the Responsible Level of OPLL Myelopathy by Correlating Static Compression and Dynamic Factors
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DOI：
10.1097/bsd.0b013e31819e9066
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发表时间：
2010-05-01
影响因子：
--
通讯作者：
Taguchi, Toshihiko
中科院分区：
文献类型：
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作者：
Azuma, Yoshikazu;Kato, Yoshihiko;Taguchi, Toshihiko
研究设计：回顾性研究目的：目的：探讨颈椎后纵韧带骨化（OPLL）致脊髓型颈椎病的责任节段。这是通过将作为动态因素的椎间活动范围（ROM）与作为静态压缩因素的脊髓可用空间（SAC）相关联来实现的。背景数据总结：椎管狭窄与脊髓病发生之间的关系之前曾报道过OPLL患者，但没有SAC、ROM和脊髓病之间的详细关系。方法：本文对27例OPLL型颈椎病患者的脊髓型颈椎病进行了研究。在每个椎体和椎间节段测量SAC和ROM。结果：脊髓诱发电位显示21例为单一责任节段，6例为2个责任节段。A组的平均ROM（8.9 °）显著高于B组（5.7 °）（P <0.01）。A组平均SAC（8.2 mm）明显低于B组（12.4 mm）（P <0.01）。使用判别分析，在A组和B组之间观察到SAC和ROM的显著差异[Box's M检验：卡方（2）= 3.31
Study Design: Retrospective study.Objective: To determine the responsible level of cervical myelopathy induced by ossification of the posterior longitudinal ligament (OPLL). This was achieved by correlating the intervertebral range of motion (ROM) as the dynamic factor with the space available for spinal cord (SAC) as the static compression factor.Summary of Background Data: The association between spinal canal stenosis and the occurrence of the myelopathy has previously been reported for OPLL patients, but not the detailed relationship between SAC, ROM, and myelopathy.Methods: We investigated OPLL type, SAC, and ROM in relation to the responsible level of cervical OPLL myelopathy in 27 cases. SAC and ROM were measured at each vertebral and intervertebral levels. The responsible level was diagnosed using spinal cord-evoked potentials and classified as group A, whereas the nonresponsible level was classified as group B.Results: Spinal cord-evoked potentials revealed 21 cases with a single responsible level and 6 cases with 2 responsible levels. The mean ROM of group A (8.9 degrees) was significantly higher (P < 0.01) than that of group B (5.7 degrees). The mean SAC of group A (8.2 mm) was significantly lower (P < 0.01) than that of group B (12.4 mm). Using discriminate analysis, significant differences for both SAC and ROM were observed between groups A and B [Box's M test: chi(2) = 3.31