【摘要】 目的探讨寰枢关节脱位伴上段颈髓受压和减压的形态学及MR I矢径变化特点,建立上段颈髓减压效果的影像学评估标准。方法通过观察和测量正常及寰枢关节脱位患者的上段颈髓受压及减压的MR I矢径变化规律,设计出上段颈髓受压指数公式和上颈髓减压改善率公式。结果上颈髓受压指数=(拟正常颈髓矢径-最窄段颈髓矢径)(mm)/拟正常颈髓矢径(mm);颈髓减压改善率=(治疗后最窄段矢径-治疗前最窄段矢径)(mm)/(拟正常颈髓矢径-治疗前最窄段矢径)(mm)×100%。结论上述影像学评估标准能客观地评估上段颈髓受压程度和减压改善效果。更多还原

【Abstract】 ObjectiveTo discuss the morphological feature and the change of MRI sagittal diameter when atlanto-axial dislocation is combined with ventral spinal cord compression and followed by ventral decompression so as to establish a radiological evaluation criterion of the decompression effect of upper cervical cord.MethodsThe MR sagittal diameters of the upper cervical cord in twenty normal persons and fifteen patients with atlanto-axial dislocation followed by ventral compression were measured.The formula of the compression exponent of upper cervical cord(CEUCC) and that of the compression improvement rate of upper cervical cord(CIRUCC) were designed.Results The formulas were as followed: CEUCC=(PSDCC-SDSCC)/PSDCC.PSDCC represents the pseudo-normal sagittal diameter of cervical cord.SDSCC represents the sagittal diameter of the most stegnotic segment of cervical cord.CIRUCC=(postoperative SDSCC-preoperative SDSCC)/(PSDCC-preoperative SDSCC).ConclusionThe above-mentioned radiological evaluation criterion can objectively evaluate the compression degree and the compression improvement effect of upper cervical cord.更多还原