Evaluation of Knees in Asymptomatic Amateur Ice Hockey Players Using 3.0-T Magnetic Resonance Imaging: A Case-Control Study Translated title: 无症状业余冰球运动员膝关节3.0-T MRI评价：一项病 例对照研究

Abstract

Background:

Research on the changes to knee structures in asymptomatic amateur ice hockey players (AAIHPs) has been limited. We aimed to assess the performance of the knees in AAIHPs using 3.0-T magnetic resonance imaging (MRI).

Methods:

A total of 71 asymptomatic knees (32 AAIHPs and 39 age- and sex-matched controls) were imaged using a 3.0-T MRI scanner at the Affiliated Zhongshan Hospital of Dalian University in April 2017. Two experienced musculoskeletal radiologists were blinded to assess all MRI findings, including bursae around the knee, bone marrow edema (BME), meniscal signal changes, and articular cartilage and ligament damage. Any disagreements were resolved by a third professor of musculoskeletal radiology. Categorical variables were compared using the Chi-square test and continuous variables using the Student's t-test or Mann-Whitney U-test.

Results:

The most common finding was fluid-filled bursae surrounding the knee. In the AAIHP group, which totaled 32 knees and 416 bursae, 155 (37%) fluid-filled bursae were present. In the control group, there were a total of 39 knees and 507 bursae, and 91 (18%) fluid-filled bursae were present. There was a significant difference in the number of fluid-filled bursae between the two groups ( P < 0.05). However, in AAIHPs, the prevalence of meniscal signal changes (16 knees, 50%) was higher than in the control group (2 knees, 5%; P < 0.001). Importantly, 15 of the 19 were grade II signals. Other changes were only found in AAIHPs. Articular cartilage lesions were detected in 47% of their knees, predominantly at the patellofemoral joint, and BME was found in 34% of their knees.

Conclusion:

The MRI findings of knees in AAIHPs mainly manifested as self-protection reaction, and proper ice hockey exercise could be advocated.

摘要

背景:

关于无症状业余冰球运动员（asymptomatic amateur ice hockey player，AAIHP）膝关节结构变化的研究较少，本研究的 目的是应用3.0-T磁共振成像仪（Magnetic Resonance Imaging, MRI）评估AAIHP膝关节MRI的表现。

方法:

2017年4月于大连大学附属中山医院共收集71个无症状膝关节（32个业余冰球运动员膝和39个年龄性别匹配的对照组 膝）纳入研究。两名经验丰富的骨肌放射科医师采用盲法评估膝周滑囊积液、骨髓水肿（bone marrow edema, BME）、半月 板信号改变、关节软骨及韧带损伤情况，意见不一致时由第三位骨肌放射学教授决定。分类变量间的比较运用卡方检验，连 续变量间的比较运用Student's t检验或Mann-Whitney U检验行统计学分析。

结果:

膝周滑囊积液为最常见的MRI表现，AAIHP组32膝共416个膝周滑囊中共观察到155个（37%）膝周滑囊积液；对照组 39膝共507个膝周滑囊中共观察到91个（18%）膝周滑囊积液，两组间差异有统计学意义（ P<0.05）。AAIHP组半月板信号改 变（16膝，50%）高于对照组（2膝，5%）， ( P<0.001)。最重要的是19个膝关节半月板信号改变中有15个是II级信号改变。其 他改变仅在AAIHP组中发现，膝关节关节软骨损伤占47%，且主要表现为髌股关节的软骨损伤；34%的膝盖中检测到BME。

结论:

无症状业余冰球运动膝关节主要表现为自我保护反应，冰球运动值得提倡。