Comparison Of MRI And Arthroscopy Of Knee Joint Injury

Objective:1.Analyze the MRI findings and arthroscopic diagnosis of knee joint injury,and discuss the value of conventional MRI(different posture and scan sequence)in the diagnosis of knee joint injury and the assessment of severity of lesions in order to provide a basis for the treatment and prognosis of knee joint injury.2.Analyze the possible causes of misdiagnosis and missed diagnosis of conventional MRI in the diagnosis of knee injury,and increase the level of conventional MRI in the diagnosis of knee injury.Methods: 1.Collect 268 patients with intact knee injuries who were newly diagnosed in our hospital from November 2014 to November 2017.2.Observe and study the knee articular cartilage,meniscus and ligament injuries of all patients in different postures and sequences of conventional MRI,classify and classify the meniscus injury,grade the anterior cruciate ligament and articular cartilage injury,and compare with the results of arthroscopy.3.using statistical software SPSS22.0 statistical analysis of the data.The diagnostic results of conventional MRI on the meniscus,ligament and articular cartilage injuries were calculated.The arthroscopic diagnosis was used as the gold standard to calculate the sensitivity,specificity and accuracy of MRI diagnosis.The Kappa test was used to analyze the consistency between the MRIdiagnosis and the knee arthroscopic diagnosis.Results: 1.The arthroscopic diagnosis results are the gold standard.The total sensitivity,specificity,and accuracy of MRI diagnosis of meniscal injury are 96.9%,93.2%,and 95.3%,respectively.The sensitivity,specificity,and accuracy of the diagnosis of grade I injury The sexes were respectively 62.5%,98.1%,96.5%,class II was 80%,97.5%,96.5%,class III was 97.4%,97.8%,97.6%.Conventional MRI can well detect meniscus injury and have a strong ability to diagnose severe injuries.However,for low-grade injuries,the sensitivity of diagnosis is slightly lower.Conventional MRI and arthroscopic diagnosis of grade I and II meniscus injury is of moderate consistency,and the consistency of the diagnosis of grade III meniscus injury is better.The sensitivity of conventional MRI in the diagnosis of horizontal meniscal tears,transverse tears,longitudinal tears,oblique tears,bucket-like tears,radial tears,and mixed tears was 50%,75%,and 72.7%,respectively.,94.3%,88.9%,71.4%,87.5%,specificity were 100%,98.8%,99.4%,98.5%,99.4%,98.8%,98.8%,respectively,the accuracy was 98.8%,98.2%,94.7%,97.6%,98.8%,97.6%,98.2%.Conventional MRI can accurately classify the meniscus injury,and arthroscopic diagnosis of meniscus horizontal tear,transverse tear,radial tear consistency of the middle,diagnosis of longitudinal tear,oblique tear,bucket handle-like tear,The consistency of mixed tears is better.2.Based on arthroscopic diagnosis results,the total sensitivity,specificity,and accuracy of conventional MRI diagnosis of ACL injury were90.3%,93.9%,and 92.5%,respectively.The sensitivity,specificity,and accuracy of the diagnosis of Class I injury were respectively.It is 54.5%,94.2%,87.5%,II is 73.3%,92.3%,88.8%,III is 80%,98.7%,97.5%.The sensitivity of MRI in diagnosing ACL injury is high,and lesions can be found well,but the sensitivity of diagnosis of grade I lesions is low.Conventional MRI and knee arthroscopy were of moderate consistency in the diagnosis of grade I and II ACL injuries,and the consistency of diagnosis of grade III ACL lesions was better.3.Based on the results of arthroscopic diagnosis,thetotal sensitivity,specificity,and accuracy of conventional MRI in the diagnosis of cartilage injury were 89.9%,93.5%,and 91.1%,respectively;the sensitivity,specificity,and accuracy of the diagnosis of grade I lesions were respectively.It was 41%,96.7%,93.2%;Grade II was 56.5%,96.2%,92.2%;Grade III was 82.4%.94.7%.92.1%;Grade IV was 84.3%,98.4%,94.2%.The sensitivity of conventional MRI in the diagnosis of articular cartilage is slightly lower,especially in the diagnosis of Class I injury.Conventional MRI and arthroscopic diagnosis of grade I cartilage injury consistency is poor,the consistency of the diagnosis of grade II cartilage injury is moderate,the consistency of the diagnosis of grade III,grade VI articular cartilage injury is better.Conclusion: 1.Routine MRI can show the site and range of knee meniscus injury,the specificity and accuracy of diagnosis of meniscus injury and grading is higher,and the diagnosis of meniscus injury type is specific and accurate.2.Conventional MRI can well detect the ACL injury of the knee joint.The specificity and accuracy of ACL injury classification diagnosis are higher.3.The specificity of conventional MRI in the diagnosis of knee cartilage injury is higher,and the specificity and accuracy of the classification diagnosis of articular cartilage injury are higher.Routine MRI examination is simple,multi-sequence,multi-azimuth imaging can fully and accurately diagnose the damage of the main structure of the knee joint,assess the severity of the lesion,and effectively diagnose the knee joint injury.