Clinical Application Of High-Frequency Ultrosound ACL Injury

ObjectiveIn this study, to evaluate the validity of high-frequency ultrasonography in diagnosisof rupture of the anterior cruciate ligament(ACL) of the knee by comparing the diagnosticresults of the high-frequency ultrasonography and arthroscopic surgery in diagnosis ofinjured cruciate ligaments,then to assess whether the new technology which diagnosed theanterior cruciate ligament (ACL) ruptures using ultrasonography can be applicated wildlyin the clinical.MethodsFrom March2011to March2012,31patients, having complete medical records,clinically suspected to have injury of the anterior cruciate ligament of the knee wereexamined with clinical tests,ultrasonography and arthroscopy,at least having a MRIexamination.linical tests(including Anterior drawer test,Lachman test and Pivot shift test)are all operated by an experienced orthopaedic attending physician,then saving informa-ions and examination results.31patients clinically suspected to have the ACL injuryedwere examined by8.0MHz linear probe by an attending physician In Department ofUltrasound who was undergo a short-term cultivate and clinical practices by a experiencedprofessionals in ultrasonography.And saving informations and examination results.Theresults were compared with those of arthroscopy.at last,the collected informations wasanalyzed by statistics.ResultsHigh-frequency ultrasonography could clearly reveal the anatomic structure andlaceration of anteriorcruciate ligaments.There are24cases with ultrasonographic fordiscontinuity of ACL, abnormal contour of ACL performance echo,local dark,areas uneven,swelling,in23of27cases with a lot of joint or the cavity effusion,in4of27cases with asmall amount of fluid.The rest are normal echos and no Joint effusions.With a meniscustear in5patients,and the medial collateral ligament damage Injury in6,and merge twodamage4cases.One case is segond fracture.Compared with Arthroscopy, the sonographic findings were confirmed in4of31cases.The sensitivity of85.2%,specificity of75%,accuracy of83.9%,positive predictive value of95.8%,and negative predictive value of42.9%.Positive likelihood ratio of3.408and negative likelihood ratio of0.197,Youdenvalue of0.602and kaPPa agreement of0.456.The difference of diagnosis accuracybetween ultrasonography and arthroscopy was statistically significant(P<0.05).ultrasound,MRI and stability test diagnosis results there are significant difference (P<0.05).ConclusionAs an economical,Convenience,practical,learn easily,painless,non-invisveimaging di-agnostic method,ultrasonography is useful for detecting the presence of rupture of the ACLof the knee,so it has a clinical value in clinical practice.Especially in medium and smallhospitals, community clinics..