膝关节骨关节炎软骨下水肿与MRI及临床表现的相关性研究

目的 探讨膝关节骨关节炎(OA)软骨下骨髓水肿与一般临床指标及股四头肌面积、半月板分级的相关性.方法 收集在本院就诊的膝关节OA 患者72例,行膝关节正侧位X线及常规MRI检查,并在12个月后不同时间点复查X线平片和MRI.对各膝关节进行K-L分级、骨髓水肿评分、半月板分级及VAS评分.采用t检验和秩和检验对2组一般资料进行比较,采用Spearman进行双变量相关性分析.结果 初次随访中有骨髓水肿组的年龄及VAS评分明显低于无骨髓水肿组(P<0.05),骨髓水肿的程度与年龄及VAS评分中度相关,与其他指标相关性不大.12个月后随访中,骨髓水肿组的体质量指数(BMI)及股四头肌面积与无骨髓水肿组出现差异(P<0.05).骨髓水肿程度与年龄、股四头肌面积及VAS评分中度相关.结论 关节炎进展中骨髓水肿范围与年龄、股四头肌面积、BMI及VAS评分相关,MRI测量指标较X线更能反映膝关节OA进展,同时也揭示了与膝关节OA进展相关的部分因素.

Correlation between marrow edema and related MRI and clinical manifestations in patients with knee osteoarthritis

Objective To investigate the relationship between the marrow edema and general clinical index,quadriceps muscle area,and the meniscus grade of knee osteoarthritis(OA).Methods 72 patients were collected with knee OA in our hospital, underwent X-ray and routine MRI examination of knee, and the same X-ray and MRI were reviewed at 12 months later in different time point.The K-L grading, bone marrow edema score, meniscal grading and VAS score of each knee joint were evaluated.The t-test and Rank-sum test were used to compare the two groups of general data, Spearman was used to perform bivariate correlation analysis.Results The age and VAS score of bone marrow edema group at the initial follow-up were significantly lower than those without edema group(P<0.05),the degree of marrow edema was moderately correlated with age and VAS score, and was not significantly correlated with other indexes.12 months later, BMI and the area of quadriceps femoris in the group with marrow edema were different from those in the group without bone marrow edema(P<0.05), the degree of marrow edema was moderately correlated with age, quadriceps area and VAS.Conclusion The range of marrow edema was related to age, quadriceps area, BMI index and VAS score in MRI.The MRI measurement could reflect the progression of knee OA more than that of X-ray.It also revealed some factors related to the progression of knee OA.