AIM: To evaluate cut-off values and performance of acoustic radiation force impulse imaging (ARFI) using transient elastography [FibroScan■ (FS)] as a reference. METHODS: Six hundred and six patients were enrolled in...AIM: To evaluate cut-off values and performance of acoustic radiation force impulse imaging (ARFI) using transient elastography [FibroScan■ (FS)] as a reference. METHODS: Six hundred and six patients were enrolled in this study.All patients underwent liver stiffness measurement with FS (FS-LS) and ARFI (with shear wave velocity quantification; ARFI-SWV) and the performance of ARFI in comparison to FS was determined. Sixtyeight patients underwent liver biopsy. RESULTS: Significantly higher success rates for the determination of liver stiffness were found using ARFI as compared to FS [604/606 (99.7%) vs 482/606 (79.5%); P < 0.001]. ARFI-SWV correlated significantly with FS-LS (r = 0.920, P < 0.001). ARFI-SWV increased significantly with the stage of fibrosis (1.09 ± 0.13 m/s for patients with no significant fibrosis (FS-LS < 7.6 kPa); 1.46 ± 0.27 m/s for patients with significant liver fibrosis (7.6 < FS-LS ≤ 13.0 kPa); and 2.55 ± 0.77 m/s for patients with liver cirrhosis (FS-LS > 13.0 kPa)). ARFI-SWV cut-off values were identified for no significant fibrosis (1.29 m/s; sensitivity 91.4% and specificity 92.6%) and for liver cirrhosis (1.60 m/s; sensitivity 92.3% and specificity 96.5%). The optimal cut-off value for predicting liver fibrosis (F ≥ 2) was 1.32 m/s (sensitivity 87.0% and specificity 80.0%) and for liver cirrhosis (F4) 1.62 m/s (sensitivity 100% and specificity 85.7%), for patients who underwent liver biopsy. An excellent inter-and intraobserver reproducibility was observed for ARFI-SWV determinations. CONCLUSION: An ARFI-SWV cut-off value of 1.29 m/s seems to be optimal for patients with no significant liver fibrosis and 1.60 m/s for patients with liver cirrhosis.展开更多
目的比较FibroScan与FibroTouch对肝纤维化程度的诊断价值。方法收集2013年9月-2014年3月就诊于吉林大学第一医院肝胆胰内科的患者962例,同时行FibroScan和FibroTouch检测。其中33例有肝穿刺病理分期,66例可计算天冬氨酸转氨酶与血小板...目的比较FibroScan与FibroTouch对肝纤维化程度的诊断价值。方法收集2013年9月-2014年3月就诊于吉林大学第一医院肝胆胰内科的患者962例,同时行FibroScan和FibroTouch检测。其中33例有肝穿刺病理分期,66例可计算天冬氨酸转氨酶与血小板比值指数(APRI)(53例慢性乙型肝炎,13例慢性丙型肝炎)。2种检测值之间的相关性采用Spearman秩相关检验。利用受试者工作特征曲线(ROC)分析2种检测方法对肝纤维化程度的诊断价值,并进行比较。结果对所有患者FibroScan与FibroTouch的测量值进行分析,FibroScan与FibroTouch的相关系数为0.866(P<0.05,n=962),与APRI的相关系数分别为0.58、0.63(P<0.05,n=66),与肝穿刺病理分期的相关系数分别为0.67、0.74(P<0.05,n=33)。对于慢性乙型肝炎患者,FibroScan与FibroTouch诊断APRI分期≥2的ROC曲线下面积(AUC)分别为0.761和0.728,两者差异无统计学意义(P=0.61);对于慢性丙型肝炎患者,两者诊断APRI分期≥1的AUC分别为0.810和0.893,两者差异亦无统计学意义(P=0.38)。FibroScan与FibroTouch诊断肝脏病理分期≥S1、≥S2、≥S3、≥S4的AUC分别为0.830 vs 0.889(P=0.15)、0.841 vs 0.835(P=0.90)、0.888 vs0.920(P=0.43)和0.964 vs 0.979(P=0.45)。结论 FibroScan与FibroTouch检测对肝纤维化程度的诊断价值相似,但本研究肝穿刺病例数较少,有待扩大样本进一步研究。展开更多
Chronic infection with hepatitis C virus(HCV) is a leading cause of liver-related morbidity and mortality worldwide and predisposes to liver fibrosis and endstage liver complications. Liver fibrosis is the excessive a...Chronic infection with hepatitis C virus(HCV) is a leading cause of liver-related morbidity and mortality worldwide and predisposes to liver fibrosis and endstage liver complications. Liver fibrosis is the excessive accumulation of extracellular matrix proteins, including collagen, and is considered as a wound healing response to chronic liver injury. Its staging is critical for the management and prognosis of chronic hepatitis C(CHC) patients, whose number is expected to rise over the next decades, posing a major health care challenge. This review provides a brief update on HCV epidemiology, summarizes basic mechanistic concepts of HCV-dependent liver fibrogenesis, and discusses meth-ods for assessment of liver fibrosis that are routinely used in clinical practice. Liver biopsy was until recently considered as the gold standard to diagnose and stage liver fibrosis. However, its invasiveness and drawbacks led to the development of non-invasive methods, which include serum biomarkers, transient elastography and combination algorithms. Clinical studies with CHC patients demonstrated that non-invasive methods are in most cases accurate for diagnosis and for monitoring liver disease complications. Moreover, they have a high prognostic value and are cost-effective. Non-invasive methods for assessment of liver fibrosis are gradually being incorporated into new guidelines and are becoming standard of care, which significantly reduces the need for liver biopsy.展开更多
AIM:To compare results of liver stiffness measurements by transient elastography(TE) obtained in our patients population with that used in a recently published meta-analysis.METHODS:This was a single center cross-sect...AIM:To compare results of liver stiffness measurements by transient elastography(TE) obtained in our patients population with that used in a recently published meta-analysis.METHODS:This was a single center cross-sectional study.Consecutive patients with chronic viral hepatitis scheduled for liver biopsy at the outpatient ward of our Infectious Diseases Department were enrolled.TE was carried out by using FibroScan(Echosens,Paris,France).Liver biopsy was performed on the same day as TE,as day case procedure.Fibrosis was staged according to the Metavir scoring system.The diagnostic performance of TE was assessed by using receiver operating characteristic(ROC) curves and the area under the ROC curve analysis.RESULTS:Two hundred and fifty-two patients met the inclusion criteria.Six(2%) patients were excluded due to unreliable TE measurements.Thus,246(171 men and 75 women) patients were analyzed.One hundred and ninety-five(79.3%) patients had chronic hepatitis C,41(16.7%) had chronic hepatitis B,and 10(4.0%) were coinfected with human immunodeficiency virus.ROC curve analysis identified optimal cut-off value of TE as high as 6.9 kPa forF ≥ 2;7.9 kPa forF ≥ 3;9.6 kPa for F = 4 in all patients(n = 246),and as high as 6.9 kPa for F ≥ 2;7.3 kPa for F ≥ 3;9.3 kPa for F = 4 in patients with hepatitis C(n = 195).Cut-off values of TE obtained by maximizing only the specificity were as high as 6.9 kPa for F ≥ 2;9.6 kPa for F ≥ 3;12.2 kPa for F = 4 in all patients(n = 246),and as high as 7.0 kPa forF ≥ 2;9.3 kPa forF ≥ 3;12.3 kPa forF = 4 in patients with hepatitis C(n = 195).CONCLUSION:The cut-off values of TE obtained in this single center study are comparable to that obtained in a recently published meta-analysis that included up to 40 studies.展开更多
文摘AIM: To evaluate cut-off values and performance of acoustic radiation force impulse imaging (ARFI) using transient elastography [FibroScan■ (FS)] as a reference. METHODS: Six hundred and six patients were enrolled in this study.All patients underwent liver stiffness measurement with FS (FS-LS) and ARFI (with shear wave velocity quantification; ARFI-SWV) and the performance of ARFI in comparison to FS was determined. Sixtyeight patients underwent liver biopsy. RESULTS: Significantly higher success rates for the determination of liver stiffness were found using ARFI as compared to FS [604/606 (99.7%) vs 482/606 (79.5%); P < 0.001]. ARFI-SWV correlated significantly with FS-LS (r = 0.920, P < 0.001). ARFI-SWV increased significantly with the stage of fibrosis (1.09 ± 0.13 m/s for patients with no significant fibrosis (FS-LS < 7.6 kPa); 1.46 ± 0.27 m/s for patients with significant liver fibrosis (7.6 < FS-LS ≤ 13.0 kPa); and 2.55 ± 0.77 m/s for patients with liver cirrhosis (FS-LS > 13.0 kPa)). ARFI-SWV cut-off values were identified for no significant fibrosis (1.29 m/s; sensitivity 91.4% and specificity 92.6%) and for liver cirrhosis (1.60 m/s; sensitivity 92.3% and specificity 96.5%). The optimal cut-off value for predicting liver fibrosis (F ≥ 2) was 1.32 m/s (sensitivity 87.0% and specificity 80.0%) and for liver cirrhosis (F4) 1.62 m/s (sensitivity 100% and specificity 85.7%), for patients who underwent liver biopsy. An excellent inter-and intraobserver reproducibility was observed for ARFI-SWV determinations. CONCLUSION: An ARFI-SWV cut-off value of 1.29 m/s seems to be optimal for patients with no significant liver fibrosis and 1.60 m/s for patients with liver cirrhosis.
文摘目的比较FibroScan与FibroTouch对肝纤维化程度的诊断价值。方法收集2013年9月-2014年3月就诊于吉林大学第一医院肝胆胰内科的患者962例,同时行FibroScan和FibroTouch检测。其中33例有肝穿刺病理分期,66例可计算天冬氨酸转氨酶与血小板比值指数(APRI)(53例慢性乙型肝炎,13例慢性丙型肝炎)。2种检测值之间的相关性采用Spearman秩相关检验。利用受试者工作特征曲线(ROC)分析2种检测方法对肝纤维化程度的诊断价值,并进行比较。结果对所有患者FibroScan与FibroTouch的测量值进行分析,FibroScan与FibroTouch的相关系数为0.866(P<0.05,n=962),与APRI的相关系数分别为0.58、0.63(P<0.05,n=66),与肝穿刺病理分期的相关系数分别为0.67、0.74(P<0.05,n=33)。对于慢性乙型肝炎患者,FibroScan与FibroTouch诊断APRI分期≥2的ROC曲线下面积(AUC)分别为0.761和0.728,两者差异无统计学意义(P=0.61);对于慢性丙型肝炎患者,两者诊断APRI分期≥1的AUC分别为0.810和0.893,两者差异亦无统计学意义(P=0.38)。FibroScan与FibroTouch诊断肝脏病理分期≥S1、≥S2、≥S3、≥S4的AUC分别为0.830 vs 0.889(P=0.15)、0.841 vs 0.835(P=0.90)、0.888 vs0.920(P=0.43)和0.964 vs 0.979(P=0.45)。结论 FibroScan与FibroTouch检测对肝纤维化程度的诊断价值相似,但本研究肝穿刺病例数较少,有待扩大样本进一步研究。
基金Supported by Grant from the Natural Sciences and Engineering Research Council of Canada(NSERC)to Pantopoulos K,No.RGPIN 288283-2011Gkouvatsos K is recipient of a doctoral fellowship from the Fonds de la Recherche en Santédu Quebéc(FRSQ)Sebastiani G and Pantopoulos K hold Chercheur-Boursier and Chercheur National Career Awards,respectively,from the FRSQ
文摘Chronic infection with hepatitis C virus(HCV) is a leading cause of liver-related morbidity and mortality worldwide and predisposes to liver fibrosis and endstage liver complications. Liver fibrosis is the excessive accumulation of extracellular matrix proteins, including collagen, and is considered as a wound healing response to chronic liver injury. Its staging is critical for the management and prognosis of chronic hepatitis C(CHC) patients, whose number is expected to rise over the next decades, posing a major health care challenge. This review provides a brief update on HCV epidemiology, summarizes basic mechanistic concepts of HCV-dependent liver fibrogenesis, and discusses meth-ods for assessment of liver fibrosis that are routinely used in clinical practice. Liver biopsy was until recently considered as the gold standard to diagnose and stage liver fibrosis. However, its invasiveness and drawbacks led to the development of non-invasive methods, which include serum biomarkers, transient elastography and combination algorithms. Clinical studies with CHC patients demonstrated that non-invasive methods are in most cases accurate for diagnosis and for monitoring liver disease complications. Moreover, they have a high prognostic value and are cost-effective. Non-invasive methods for assessment of liver fibrosis are gradually being incorporated into new guidelines and are becoming standard of care, which significantly reduces the need for liver biopsy.
文摘目的以病理检查为金标准，评估FibroTouch与FibroScan对慢性乙型肝炎（chronic hepatitis B, CHB）患者肝纤维化分期的诊断价值。方法纳入2014年3月至2017年12月期间于北京友谊医院行肝组织活检术的CHB患者，同时行FibroTouch和FibroScan检测，分析两种检测方法诊断CHB患者肝纤维化分期的硬度值、最佳诊断界值、曲线下面积（the area under the curve，AUC）。
结果103例CHB患者，使用FibroTouch和FibroScan检测不同纤维分期的肝脏硬度值无统计学差异。此外，FibroTouch和FibroScan诊断肝纤维化分期≥S1的界值分别为5.45和5.55 kPa，≥S2的界值分别为7.10和6.65 kPa，≥S3的界值分别为11.05和9.20 kPa，≥S4的界值分别为15.50和15.45 kPa。两种检测方法诊断肝纤维化分期≥S1、≥S2、≥S3、S4的AUC分别为0.858和0.765（P＝0.54）、0.812和0.801（P＝0.68）、0.863和0.878（P＝0.45）和1.0和0.99（P＝0.38）。
结论FibroTouch与FibroScan诊断CHB患者肝纤维化程度的诊断效能相似。
文摘AIM:To compare results of liver stiffness measurements by transient elastography(TE) obtained in our patients population with that used in a recently published meta-analysis.METHODS:This was a single center cross-sectional study.Consecutive patients with chronic viral hepatitis scheduled for liver biopsy at the outpatient ward of our Infectious Diseases Department were enrolled.TE was carried out by using FibroScan(Echosens,Paris,France).Liver biopsy was performed on the same day as TE,as day case procedure.Fibrosis was staged according to the Metavir scoring system.The diagnostic performance of TE was assessed by using receiver operating characteristic(ROC) curves and the area under the ROC curve analysis.RESULTS:Two hundred and fifty-two patients met the inclusion criteria.Six(2%) patients were excluded due to unreliable TE measurements.Thus,246(171 men and 75 women) patients were analyzed.One hundred and ninety-five(79.3%) patients had chronic hepatitis C,41(16.7%) had chronic hepatitis B,and 10(4.0%) were coinfected with human immunodeficiency virus.ROC curve analysis identified optimal cut-off value of TE as high as 6.9 kPa forF ≥ 2;7.9 kPa forF ≥ 3;9.6 kPa for F = 4 in all patients(n = 246),and as high as 6.9 kPa for F ≥ 2;7.3 kPa for F ≥ 3;9.3 kPa for F = 4 in patients with hepatitis C(n = 195).Cut-off values of TE obtained by maximizing only the specificity were as high as 6.9 kPa for F ≥ 2;9.6 kPa for F ≥ 3;12.2 kPa for F = 4 in all patients(n = 246),and as high as 7.0 kPa forF ≥ 2;9.3 kPa forF ≥ 3;12.3 kPa forF = 4 in patients with hepatitis C(n = 195).CONCLUSION:The cut-off values of TE obtained in this single center study are comparable to that obtained in a recently published meta-analysis that included up to 40 studies.
