髌股关节异常对合的CT检查

CT of patellofemoral malalignment

目的探讨髌股关节异常对合的CT检查方法。方法21例30侧膝髌股关节疼痛患者(症状组)及15例30侧膝无症状者(对照组)在屈膝0°、15°及30°时分别对髌股关节行CT横断扫描,分别测量并比较分析髁间沟角、和谐角、外侧髌股角等参数。结果在屈膝30°时扫描,症状组髌股关节的和谐角明显大于对照组或(和)外侧髌股角明显小于对照组(P<0·01),髁间沟角差异无统计学意义(P>0·05)。结论CT扫描并测量和谐角、外侧髌股角是评价髌股关节异常对合的重要参数;屈膝30°髌股关节CT横断扫描是检出髌股关节异常对合的有效方法。

Objective To evaluate the methods of CT scan in patellofemoral malajignment. Methods 21 patients （30 knees） with patellofemoral pain and 15 asymptomatic volunteers （20 knees） were studied,the pateIlofemorals were examined by CT scan at 0° and 15° and 30° flexion. CT imaging was analyzed and some parameters including sulcus angle, congruent angle and lateral patellofemoral angle were analyzed comparatively. Results CT scan at 30° flexion,the congruent angle in symptomatic group was bigger than those in asymptomatic group or （and） the lateral patellofemoral angle was smaller than those in asymptomafic group significantly（P 〈 0.01） ,but the sulcus angle was no difference in statistics between two groups（ P 〉 0.05）. Conclusion Congruent angle and lateral patellofemoral angle are the important parameters in diagnosis of patellofemoral malalignment and flexion CT scans（at 30°） is the effective methed in diagnosis of datellofemoral malalignment.