Study on MRI for a series of acute traumatic lateral patellar dislocations of children and adolescents
10.3969/j.issn.1672-8270.2024.06.014
- VernacularTitle:磁共振成像对儿童及青少年急性外伤性髌骨外侧脱位的系列研究
- Author:
Xiaofang PENG
1
;
Lei ZHANG
;
Chunsheng LIU
;
Zhiquan GUO
;
Yunli SHI
Author Information
1. 唐山市第二医院放射科 唐山 063000
- Keywords:
Magnetic resonance imaging(MRI);
Children and adolescent;
Acute traumatic lateral patellar dislocation
- From:
China Medical Equipment
2024;21(6):72-75,86
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the manifestations of magnetic resonance imaging(MRI)on acute traumatic lateral patellar dislocation of children and adolescents.Methods:MRI images of the affected side and healthy side of 110 children and adolescents with acute traumatic lateral patellar dislocation who were treated in the Second Hospital of Tangshan from July 2016 to April 2022 were retrospectively analyzed.The correlation of the medial patellofemoral ligament(MPFL)on the affected side between the tear location and tear degree was compared and analyzed.According to the cartilage injury grading system of international cartilage repair society(ICRS),the articular cartilage injury of affected side was divided into 4 grades,and the correlation between the articular cartilage injury grading and the articular cartilage injury location was compared and analyzed.Three methods of measuring patellar height,which included Insall-Salvati index(ISI),patellotrocheal index(PTI)and Caton-Deschamps index(CDI),were used to compare and analyze the differences of MRI data of patellar height between the affected side of knee joint and the healthy knee joint of pediatric children.Results:In 110 patients with MPFL injury,73 cases were partial tears and 37 cases were complete tears.There was significant difference in the injury at MPFL patellar attachment location between complete tears(22 cases)and partial tears(19 cases)(x2=11.740,P<0.05),and there was significant difference in MPFL multiple injury between partial tear(40 cases)and complete tear(8 cases)(x2=10.990,P<0.05).There were no significant differences in the injuries of MPFL middle segment and the origin of femur between partial tears and complete tears.There were 162 lesions in 110 cases with osteochondral injury,which included 55 lesions on the patellar side,33 lesions on the femur side and 74 multiple lesions according to the part of injury.There was significant difference between the location of osteochondral injury and injury grading(x2=38.153,P<0.05).The ISI,PTI and CDI on the affected side were significantly lower than those on the healthy side in pediatric patients with acute traumatic lateral patellar dislocation of children and adolescents(x2=30.853,12.586,19.656,P<0.05),respectively.Conclusion:The complete tears are more likely to occur in the injury of MPFL patellar attachment location of pediatric patients with acute traumatic lateral patellar dislocation of children and adolescents,while multiple injuries are more likely to be in partial tears.There is correlation between the articular cartilage injury grading and the articular cartilage injury location in pediatric patients.MRI is an important method to diagnose MPFL injury,which can provide more evidence for clinical treatment.
