慢性乙型肝炎患者肝剪切波速度与肝纤维化分期的相关性研究

目的 探讨慢性乙型肝炎患者肝剪切波速度与肝纤维化分期的相关性.方法 使用声触诊组织量化技术(VTQ)对112例慢性乙肝患者肝右叶进行检测,获得肝剪切波速度,并与肝穿刺组织病理学对照,组织学分期参照2000年修订的《病毒性肝炎防治方案》病理诊断标准.结果 S0期15例,S1期17例,S2期15例,S3期23例,S4期42例.S0期与S1期剪切波速度差异无统计学意义,其余各期两两比较差异均有统计学意义.S2期ROC曲线下面积为0.94,以1.27 m/s为界值,诊断S2期的敏感度为80.0％,特异度为89.5％;S3期ROC曲线下面积为0.87,以1.43 m/s为界值,诊断S3期的敏感度为71.8％,特异度为87.7％;S4期ROC曲线下面积为0.95,以1.79 m/s为界值,诊断S4期的敏感度为83.3％,特异度为89.4％0.肝剪切波速度与肝纤维化分期呈正相关(r=0.92).结论 慢性乙型肝炎患者肝实质的VTQ值与病理显示的肝纤维化程度呈正相关,肝纤维化程度越重,肝实质的VTQ值越大.

Study in the correlativity between liver shear-wave velocities and liver fibrosis stages of patients with chronic hepatitis B

Objective To explore the correlativity between liver shear-wave velocities and liver fibrosis stages in chronic hepatitis B patients.Methods One hundred and twelve patients with chronic hepatitis B accepted virtual touch tissue quantification (VTQ) testing to obtain shear-wave speed and compared to histological stages.Each patient received VTQ measurements in right lobe of liver.The standards of histological examination of the stages of fibrosis refered to the Hepatitis Pathology Diagnostic Standard Xi'an formulated in 2000.Results Of 112 patients,S0,S1,S2,S3 and S4 were 15,17,15,23 and 42 respectively.There was no significant statistically difference of the mean values of liver shear-wave speed between S0 and S1,while among the rest subgroup had significant statistically differences by multiple comparisons.The areas under the ROC curves were 0.94 for S2,0.87 for S3,and 0.95 for S4.The cut-off values of the shear wave velocity were as follows:1.27 m/s for S2(sensitivity 80.0％,specificity 89.5％),1.43 m/s for S3 (sensitivity 71.8 ％,specificity 87.7 ％ ) and 1.79 m/s for S4 (sensitivity 83.3 ％,specificity 89.4％).Hepatic fibrosis expressed by the histological scale correlated well with the VTQ values of all patients ( r =0.92).Conclusions Along with the increase of liver fibrosis degree,the hepatic parenchyma shear wave velocities increase gradually.The more advanced the degree of fibrosis,the higher the shear wave velocities.