【摘要】 为了探索膝关节CT参数对小型犬髌骨脱位的临床诊断价值，本研究分析了42例健康犬膝关节结构，选取临床上较易实现CT影像学测量的力线参数作为健康组；回顾性分析武汉科道动物医院进行锥形束CT扫描的髌骨脱位小型犬(体重≤10 kg)52例，作为髌骨脱位组。对比两组间髌股关节力线参数，制作受试者操作特性曲线(ROC曲线)以获取有统计学意义的参数，计算相关参数的临界值、敏感度和特异度。结果显示：健康组滑车沟角阈值范围130.9°±5.6°,当滑车沟角>138.8°时，其对髌骨脱位诊断的ROC曲线下面积(AUC)为0.914,特异度为100.0%,敏感度为74.1%;健康组外侧髌骨角阈值范围23.1°±3.5°,当外侧髌骨角>27.3°时，其对髌骨脱位诊断的AUC为0.955,特异度为88.9%,敏感度为92.6%;健康组髌骨偏移角阈值范围89.2°±4.7°,当髌骨偏移角<85.4°时，其对髌骨脱位诊断的AUC为0.925,特异度为81.5%,敏感度为85.2%。结果表明，滑车沟角、外侧髌骨角和髌骨偏移角是诊断小型犬内侧髌骨脱位最具临床价值的影像学参数。更多还原

【Abstract】 In order to explore the clinical value of CT parameters of the knee joint of small dogs for diagnosis of patellar dislocation, this study analyzed the knee joint structure of 42 healthy dogs, and selected patellofemoral joint force lines that can be easily measured by CT imaging in clinical practice, and used them as healthy group. Through retrospective analysis of cone-beam CT scanning images of 52 small dogs with patella dislocation(weight≤10 kg) from Wuhan Kedao Animal Hospital, and used them as patella dislocation group. Comparison of the parameters between the healthy group and patella dislocation group, the receiver operating characteristic(ROC) curve was obtained to determine statistically significant parameters, calculated the corresponding critical value, and judged the sensitivity and specificity of the relevant parameters. The results showed that the range of the trochlear groove angle(TGA) of healthy group was 130.9°±5.6°. When the TGA was greater than 138.8°, the area under the ROC curve(AUC) for the diagnosis of patellar dislocation was 0.914, the specificity was 100.0%, and the sensitivity was 74.1%. The range of the lateral patella angle of healthy dogs was 23.1°±3.5°. When the lateral patella angle was greater than 27.3°, the AUC for the diagnosis of patellar dislocation was 0.955, the specificity was 88.9%, and the sensitivity was 92.6%. Healthy patella deviation of the shift angle range was 89.2°±4.7°. When the patella shift angle was less than 85.4°, the AUC for the diagnosis of patellar dislocation was 0.925, the specificity was 81.5%, and the sensitivity was 85.2%. Thus, the trochlear groove angle, the lateral patella angle and the patella offset angle are the three most clinically valuable parameters for diagnosing medial dislocation of the patella in small dogs.更多还原