Le Hoang Di Thu, Hoang Ngoc Thanh, Ngo Dac Hong An, Le Nghi Thanh Nhan, Le Trong Binh, Le Trong Khoan, Nguyen Thanh Thao
Department of Radiology, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam.
Department of Surgery, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam.
Orthop Res Rev. 2021 Apr 19;13:57-61. doi: 10.2147/ORR.S306316. eCollection 2021.
An abnormal patellar position has been proven to be associated with anterior knee pain and several other conditions that affect the patellofemoral joint. The purpose of this study was to determine the incidence of patella alta and patella baja and the applicability of the normal range of the Insall-Salvati ratio in the Vietnamese population.
Magnetic resonance imaging (MRI) was used to examine 455 Vietnamese subjects' knees. The Insall-Salvati ratio-the ratio of patellar ligament length (LL) and patellar length (PL)-was measured using sagittal T1-weighted images.
The overall mean LL/PL ratio was 1.02 (standard deviation 0.15). No significant differences in the LL/PL ratio were observed between sexes. The frequencies of patella alta (Insall-Salvati ratio >1.32) and patella baja (Insall-Salvati ratio <0.72) were 0.9% and 2.4%, respectively.
The Insall-Salvati ratio is applicable to Vietnamese populations in which high flexion activities such as kneeling and sitting cross-legged are customary. According to our measurement, the normal range of the ratio among Vietnamese subjects was 0.72 to 1.32.
异常的髌骨位置已被证实与前膝疼痛以及其他一些影响髌股关节的病症相关。本研究的目的是确定高位髌骨和低位髌骨的发生率，以及Insall-Salvati比率正常范围在越南人群中的适用性。
采用磁共振成像（MRI）检查455名越南受试者的膝关节。使用矢状面T1加权图像测量Insall-Salvati比率，即髌韧带长度（LL）与髌骨长度（PL）之比。
LL/PL比率的总体平均值为1.02（标准差0.15）。男女之间的LL/PL比率未观察到显著差异。高位髌骨（Insall-Salvati比率>1.32）和低位髌骨（Insall-Salvati比率<0.72）的发生率分别为0.9%和2.4%。
Insall-Salvati比率适用于有跪坐和盘腿等高屈曲活动习惯的越南人群。根据我们的测量，越南受试者中该比率的正常范围为0.72至1.32。
