scholarly journals Transient elastography: a novel, non-invasive method for the evaluation of liver stiffness and controlled attenuation parameter in cows

2020 ◽  
Vol 82 (5) ◽  
pp. 559-565
Author(s):  
Mamiko ONO ◽  
Yamato IMAMURA ◽  
Yusuke IRIE ◽  
Manami ARITSUNE ◽  
Shinobu NISHIOKA ◽  
...  
Keyword(s):  
Transient Elastography ◽  
Liver Stiffness ◽  
Controlled Attenuation Parameter ◽  
Non Invasive ◽  
Attenuation Parameter ◽  
Invasive Method

Non-invasive diagnosis of liver steatosis using controlled attenuation parameter (CAP) and transient elastography

2012 ◽  
Vol 32 (6) ◽  
pp. 911-918 ◽  
Author(s):  
Victor Lédinghen ◽  
Julien Vergniol ◽  
Juliette Foucher ◽  
Wassil Merrouche ◽  
Brigitte Bail
Keyword(s):  
Transient Elastography ◽  
Liver Steatosis ◽  
Controlled Attenuation Parameter ◽  
Non Invasive ◽  
Attenuation Parameter

Potential impact of screening for fatty liver disease by transient elastography with liver stiffness and controlled attenuation parameter measurements: a pilot study

2017 ◽  
Vol 55 (08) ◽  
pp. 754-760
Author(s):  
Moritz Peiseler ◽  
Anna Creutzfeldt ◽  
Insa Cassens ◽  
Claudia Glaubke ◽  
Claudia Kroll ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Pilot Study ◽  
Liver Diseases ◽  
Transient Elastography ◽  
Liver Stiffness ◽  
Chronic Liver ◽  
Chronic Liver Diseases ◽  
Normal Range ◽  
Controlled Attenuation Parameter ◽  
Attenuation Parameter

Abstract Background The prevalence of chronic liver diseases is high in developed countries, and the leading causes are amenable to prevention. The German Lebertag is to increase awareness of the burden of chronic liver diseases in the general public. We performed a pilot study using transient elastography with liver stiffness measurement (LSM) and the controlled attenuation parameter (CAP) as a screening tool for previously unrecognized liver diseases. Patients and methods LSM and CAP was performed in 60 individuals, and participants filled in a questionnaire reporting basic characteristics and past medical history. Results Median LSM and CAP values were within the normal range. Participants with self-reported diabetes mellitus had significantly elevated LSM (p = 0.02) and CAP values (p = 0.002). Participants with a BMI > 30 kg/m2 or dyslipidemia had significantly elevated CAP values (p = 0.007 and p = 0.01, respectively) with normal LSM values. Overall, 35 % of participants had elevated CAP values, indicating a high prevalence of hepatic steatosis. Discussion In a German pilot study, diabetes mellitus was a key risk factor for increased LSM and CAP values. Prevalence of steatosis was high and comparable to other Western countries. Transient elastography is a valuable tool to identify patients with increased risk for metabolic liver diseases. In people without risk factors, LSM and CAP values were within the normal range, indicating that screening for chronic liver injury was not warranted.

scholarly journals The Prevalence of Liver Steatosis and Fibrosis Assessed by Vibration-Controlled Transient Elastography and Controlled Attenuation Parameter in Apparently Healthy Romanian Medical Students

Diagnostics ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2341
Author(s):  
Robert Nastasa ◽  
Carol Stanciu ◽  
Sebastian Zenovia ◽  
Ana-Maria Singeap ◽  
Camelia Cojocariu ◽  
...  
Keyword(s):  
Medical Students ◽  
Transient Elastography ◽  
Liver Steatosis ◽  
Liver Stiffness ◽  
Moderate Degree ◽  
Advanced Fibrosis ◽  
Controlled Attenuation Parameter ◽  
Significant Fibrosis ◽  
Attenuation Parameter ◽  
Associated Risk Factors

Vibration-Controlled Transient Elastography (VCTE) with Controlled Attenuation Parameter (CAP) is used as a non-invasive method for evaluating liver steatosis and fibrosis simultaneously. In this prospective study, we aimed to assess the prevalence of liver steatosis and fibrosis, as well as the associated risk factors in Romanian medical students by VCTE and CAP score. We used a cut-off CAP score of ≥248 dB/m for the diagnosis of mild steatosis (S1), ≥268 dB/m for moderate steatosis (S2), and ≥280 dB/m to identify severe steatosis (S3). For liver fibrosis, the cut-off values were: ≤5.5 kPa, indicating no fibrosis (F0), 5.6 kPa for mild fibrosis (F1), 7.2 kPa for significant fibrosis (F2), 9.5 kPa for advanced fibrosis (F3), and 12.5 kPa for cirrhosis (F4). In total, 426 Romanian medical students (67.8% females, mean age of 22.22 ± 1.7 years) were evaluated. Among them, 352 (82.6%) had no steatosis (S0), 32 (7.5%) had mild steatosis (S1), 13 (3.1%) had a moderate degree of steatosis (S2), and 29 (6.8%) had severe steatosis (S3). Based on liver stiffness measurements (LSM), 277 (65%) medical students did not have any fibrosis (F0), 136 (31.9%) had mild fibrosis (F1), 10 (2.4%) participants were identified with significant fibrosis (F2), 3 (0.7%) with advanced fibrosis (F3), and none with cirrhosis (F4). In conclusion, the prevalence of liver steatosis and fibrosis is low among Romanian medical students.

scholarly journals Detectability of Liver Steatosis and Fibrosis with Transient Elastography and Controlled Attenuation Parameter in Residents of St. Petersburg

2021 ◽  
Vol 31 (1) ◽  
pp. 31-38
Author(s):  
V. P. Kovyazina ◽  
K. L. Raikhelson ◽  
M. K. Prashnova ◽  
E. V. Pazenko ◽  
L. K. Palgova ◽  
...  
Keyword(s):  
Structural Changes ◽  
Transient Elastography ◽  
Liver Steatosis ◽  
Laboratory Data ◽  
Controlled Attenuation Parameter ◽  
Non Invasive ◽  
Attenuation Parameter ◽  
High Incidence ◽  
Liver Changes ◽  
High Degree

Aim. Estimation of the liver steatosis and fibrosis incidence with transient elastography and the controlled attenuation parameter in residents of St. Petersburg.Materials and methods. A prospective open single-centre population study included history, anthropometric and laboratory data on 318 outpatients aged 24—89 years (mean age 52.6 ± 14.6 years). The degrees of steatosis (assessed with the controlled attenuation parameter as ultrasound amplitude dropdown quantification in liver) and fibrosis were determined with a Fibroscan 502 Touch unit (Echosens, France).Results. Hepatic steatosis of predominantly high degree was revealed in 44.7%, combined fibrosis and steatosis — in 28%; isolated fibrosis of various stage — in 2.5%, no structural changes — in 24.8% individuals. The growth of body mass index and waist circumference significantly correlated in women with pronounced liver changes. Serum transaminase activity increased with more severe liver changes, being statistically significant for aspartic transaminase only.Conclusion. A high incidence of primary liver steatosis and fibrosis in residents of St. Petersburg warrants improved diagnostic algorithms and routine preventive measures. Transient elastography with the controlled attenuation parameter estimation provides a convenient non-invasive screening for hepatic fibrosis and steatosis.

New non-invasive tool for assessment of liver fibrosis: transient elastography

2011 ◽  
Vol 152 (22) ◽  
pp. 860-865 ◽  
Author(s):  
Gábor Horváth
Keyword(s):  
Liver Fibrosis ◽  
Liver Biopsy ◽  
Disease Progression ◽  
Liver Diseases ◽  
Transient Elastography ◽  
Liver Stiffness ◽  
Chronic Viral Hepatitis ◽  
Non Invasive ◽  
Life Threatening ◽  
Invasive Method

Formation of connective tissue causing liver fibrosis is the common trait of chronic liver diseases. The „gold-standard” of the evaluation of liver fibrosis is liver biopsy, but it is an invasive, painful procedure, and carries a significant, although small risk of life-threatening complications. It may have contraindications, and it is certainly not the ideal procedure for serially repeated assessment of disease progression. A new, non-invasive method for the assessment of liver fibrosis by measuring liver stiffness is the transient elastography. The velocity of the propagation of a shear wave is measured by ultrasound. The procedure is painless, rapid, and no needs any preparation. So far, transient elastography has been mostly validated in chronic hepatitis C, but it is applicable in liver diseases with other etiologies. The diagnostic accuracy of transient elastography increases with stage of fibrosis, and is more accurate in advanced fibrosis (F≥2, Metavir score) and in cirrhosis. Indication of antiviral therapy for chronic viral hepatitis B and C are the main field of the application of the transient elastography, and it is also a useful tool for follow-up the disease progression. It is applicable for early, non-invasive detection of graft damage after liver transplantation. Evaluation of liver damage, the stage of liver fibrosis by transient elastography may have an important role in the decision before surgery, or application of potentially hepatotoxic drugs. Histological examination of the liver tissue is not substituted in every case by transient elastography, but liver biopsy is supplanted by measuring liver stiffness for evaluation of liver fibrosis in many cases. Orv. Hetil., 2011, 152, 860–865.

Diagnostic Accuracy of Controlled Attenuation Parameter Measured by Transient Elastography for the Non-invasive Assessment of Liver Steatosis: a Prospective Study

2015 ◽  
Vol 24 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Monica Lupșor-Platon ◽  
Diana Feier ◽  
Horia Stefănescu ◽  
Attila Tamas ◽  
Emil Botan ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Multivariate Regression ◽  
Transient Elastography ◽  
Liver Steatosis ◽  
Chronic Liver Diseases ◽  
Controlled Attenuation Parameter ◽  
Non Invasive ◽  
Attenuation Parameter ◽  
Ultrasound Attenuation ◽  
A Prospective Study

Background & Aims: A novel non-invasive tool based on the evaluation of ultrasound attenuation using transient elastography (TE) has been developed, called controlled attenuation parameter (CAP). We aim to establish the histopathological parameters that significantly influence CAP, the cutoff values and their performance in predicting each steatosis grade on a group of biopsied patients with chronic liver diseases (CLD) from Romania.Methods. We prospectively analyzed 201 consecutive CLD patients who underwent CAP measurements using TE. Steatosis, liver fibrosis and necroinflammatory activity were staged and graded during the pathological analysis of bioptic specimens. Univariate and multivariate regression analyses were applied to identify the variables correlated with CAP values. The diagnostic performance of CAP for steatosis prediction was assessed using an AUC analysis.Results. Among the histopathological factors correlating with CAP, the multivariate analysis found steatosis as the only factor independently influencing CAP values (p<0.001). Maximal diagnostic accuracy (DA) was obtained for the prediction of ≥34-66% (S2) fatty load and of 67-100% (S3) fatty load (82.06%, respectively 81.59%) while, for the prediction of ≥11-33% (S1) fatty load, DA reached only 76.11%. The negative predictive value for the exclusion of ≥S2 and S3 was 93.5% and 98.7%, respectively. AUCs calculated between each two steatosis grades were: 0.772 (S0 vs S1), 0.874 (S0 vs S2), 0.904 (S0 vs S3), 0.659 (S1vs S2), 0.777 (S1 vs S3), and 0.665 (S2 vs S3).Conclusion. Steatosis is the only histopathological factor independently influencing CAP. Maximal DA could be obtained for the prediction of ≥S2 and S3 (82.06% and 81.59%), while for the prediction of S1, the accuracy reached only 76.11%.

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