膝关节半月板撕裂的低场MRI及关节镜表现评估

【】　目的　评价低场MRI对膝关节半月板撕裂的诊断准确性。　方法　2009年9月-2010年4月经关节镜检或手术确诊的膝关节损伤患者69例，其中35例41个半月板撕裂，回顾性分析、整理其临床、关节镜及MRI表现，以传统Reicher诊断的改良分级标准确定半月板撕裂的级别、形态并记录，同时对关节内其它伴随征象作统计。　结果　35例41个撕裂半月板中，17个为盘状半月板，MRI显示Ⅲa级撕裂信号24个，Ⅲb级撕裂信号5个，Ⅲc级撕裂信号4个，Ⅳ级撕裂信号1个，桶柄状撕裂信号7个。本组低场MRI诊断半月板撕裂的敏感度、特异度、准确度分别为93.18%、92.11%、92.68%。　结论　低场MRI诊断膝关节半月板撕裂与关节镜结果差异不大，是一种诊断半月板撕裂的可靠、无创性检查方法。？【Abstract】　Objective　Toevaluatetheaccuracyoflow-fieldMRIinthediagnosisofmeniscustears.　Methods　Wecollectedtheclinicaldataof69patientswithkneejointinjuriesconfirmedbysurgicaloperationorarthroscopyfromSeptembe2009toApril2010.Amongthem,35patientshad41casesofmeniscustears.Weretrospectivelyanalyzedtheirclinicalsymptoms,andtheirmanifestationsonlow-fieldMRIandarthroscopy.AccordingtothemodifieddiagnosticcriteriabasedonReicher’sdiagnosis,thegradeandtheshapeofmeniscustearsweredeterminedandrecorded,andotheraccompanyingsignsinsidethejointwerealsoanalyzedstatistically.　Results　Amongthe41casesofmeniscustearsof35patients,17werediscoidmeniscus.MRIshowedthattherewere24signalsofⅢatears,5ofⅢbtears,4ofⅢctears,1ofⅣtearsand7ofbucket-handletears.Thesensitivity,specificityandaccuracyoflow-fieldMRIinthediagnosisofmeniscustearswere93.18%,92.11%,and92.68%,respectively.　Conclusions　Thereisnosignificantdifferencebetweentheresultsofarthroscopyandlow-fieldMRIindiagnosingmeniscustears.Consequently,MRIisareliableandnon-invasivemethodinthediagnosisofmeniscustears.