Carbonell P Gutiérrez, Peña M Ojeda
aService Orthopaedic Surgery and Traumatology, General University Hospital, Alicante bService Orthopaedic Surgery and Traumatology, General Hospital, Alcoy, Spain.
J Pediatr Orthop B. 2017 Jul;26(4):289-292. doi: 10.1097/BPB.0000000000000394.
The aim of this study was to investigate the correlation between radiograph [acetabular index (AI)] and MRI measurements of the angles of children's hips and the percentage of coverage that labrum provides to the acetabulum in healthy hips of children. The healthy hips of 38 children, of a mean age of 7.7 years, were studied using anteroposterior radiographs and coronal plane MRI. We used picture archiving and communication systems software to measure the AI in hip radiographs and the acetabular bone index (ABI) and acetabular labrum index (ALI) in hip MRIs. The Kolmogorov-Smirnov test and t-test were performed. Pearson's correlation and Bland and Altman plots were determined for analysis of measurement error and interobserver and intraobserver errors. Statistical significance was set at P value less than 0.05. Interobserver and intraobserver agreement was between 0.8 and 0.98. AI was 13.7°. ABI was 16.4° and ALI was 6.7°. There was a correlation between the angles of the hips determined by radiographs and MRI. The ALI accounted for 40.8% of the mean value of the ABI. The measurements of hip angles by radiographs were similar to the ones derived from MRI. In addition, the labrum adds stability to the healthy hip in a child, indicating a significant portion of the total coverage of the acetabulum to the femoral epiphysis. AI measurements from radiographs were lower than ABI measurements obtained from MRI. ALI was 41% of the ABI, which means that the labrums, in healthy hips of children significantly increase the coverage of the femoral epiphysis and also increase the stability of the acetabulum.
III.
本研究的目的是调查X线片[髋臼指数(AI)]与儿童髋关节角度的MRI测量值之间的相关性，以及在健康儿童髋关节中盂唇对髋臼的覆盖百分比。对38名平均年龄为7.7岁儿童的健康髋关节进行了前后位X线片和冠状面MRI检查。我们使用图像存档和通信系统软件测量髋关节X线片中的AI以及髋关节MRI中的髋臼骨指数(ABI)和髋臼盂唇指数(ALI)。进行了Kolmogorov-Smirnov检验和t检验。确定了Pearson相关性以及Bland和Altman图，用于分析测量误差以及观察者间和观察者内误差。设定P值小于0.05为具有统计学意义。观察者间和观察者内一致性在0.8至0.98之间。AI为13.7°。ABI为16.4°，ALI为6.7°。X线片和MRI确定的髋关节角度之间存在相关性。ALI占ABI平均值的40.8%。X线片测量的髋关节角度与MRI得出的角度相似。此外，盂唇增加了儿童健康髋关节的稳定性，表明髋臼对股骨头骨骺的总覆盖中有很大一部分。X线片测量的AI低于MRI获得的ABI测量值。ALI为ABI的41%，这意味着在健康儿童髋关节中，盂唇显著增加了股骨头骨骺的覆盖范围，也增加了髋臼的稳定性。
III级。
