应用前方压迫指数评价寰枢椎脱位和复位情况

Anterior Compression Index for Evaluating Atlantoaxial Dislocation and Restoration

目的推导和应用前方压迫指数评价寰枢椎脱位和复位情况。方法对28例对照组和28例寰枢椎脱位患者行CT检查,分析正常情况、寰枢椎脱位术前及术后的前方压迫指数的情况。结果 28例对照组的前方压迫指数为87.86±24.98;28例患者的术前前方压迫指数为230.44±97.60,术后前方压迫指数为106.27±73.53。患者术前组与对照组差异有统计学意义(t=-7.50,P<0.0001),患者术后组与对照组相比没有统计学意义(t=-1.26,P=0.2171);术前术后两组差异有统计学意义(t=10.35,P<0.0001)。结论前方压迫指数可作为了解寰枢椎脱位严重程度和行后路复位手术的减压情况的评价指标。

Objective The study was to investigate the value of deduction and application of anterior compression index in evaluation of atlantoaxial dislocation and restoration. Method Twenty-eight cases of the control group and 28 cases of atlantoaxial dislocation treated with posterior restoration and screw-rod internal fixation technique before and af-ter surgery were recruited in this study and their data was retrospectively analyzed. All of the people underwent sagittal computerized tomography scan films. The anterior compression index was measured in all cases. Results The mean value of anterior compression index of the control group was 87.86±24.98. The mean value of anterior compression index of the preoperative patients was 230.44 ± 97.60 and the mean value of the postoperative patients was 106.27 ± 73.53. There was significant difference in those two parameters between the preoperative patients and the controls（t=-7.50,P〈0.0001）. There was no significant difference between the postoperative patients and the control group （t=-1.26, P=0.2171）. Anteri-or compression index were significantly lower after surgical operation （t=10.35, compared with before, P〈0.0001）. Con-clusion Anterior compression index can be an excellent measurement tool for the assessment of relationship of atlas and axis in atlantoaxial dislocation patients before and after posterior restoration operation.