Liver elastography

肝脏弹性成像
  • 文章类型: Journal Article
    肝脏硬度测量可用于评估肝纤维化,并且可以通过使用FibroScan®和声辐射力脉冲成像的瞬时弹性成像来获得。该研究旨在在慢性丙型肝炎队列中使用FibroScan®和声辐射力脉冲建立肝脏硬度测量评分,并探讨评分与影响因素之间的相关性和一致性。
    患者使用FibroScan®(肝脏右叶)和声辐射力脉冲(肝脏右叶和左叶)进行肝脏硬度测量。我们使用Spearman的相关性来探索FibroScan®与声辐射力冲动评分之间的关系。使用Bland-Altman图来评估FibroScan®和声辐射力脉冲评分的平均百分比差异之间的偏差。单变量和多变量分析用于评估体重指数、年龄和性别影响肝脏硬度测量之间的一致性。
    Bland-Altman显示FibroScan®和声辐射力脉冲评分之间的平均(95%CI)百分比差异为27.5%(17.8,37.2),p<0.001。FibroScan®和声辐射力脉冲评分的平均差异和百分比差异之间存在负相关(r(95%CI)=-0.41(-0.57,-0.21),p<0.001),因此表明,对于更大的FibroScan®和声辐射力脉冲评分,百分比差异变得更小。体重指数是FibroScan®和声辐射力脉冲之间差异的最大影响因素(r=0.12(0.01,0.23),p=0.05)。5/8段和左叶的声辐射力脉冲评分显示出良好的相关性(r(95%CI)=0.83(0.75,0.89),p<0.001)。
    FibroScan®和声辐射力脉冲对慢性丙型肝炎感染患者肝硬度的评估具有相似的预测值;然而,协议的水平在较低和较高的分数不同。
    UNASSIGNED: Liver stiffness measurements can be used to assess liver fibrosis and can be acquired by transient elastography using FibroScan® and with Acoustic Radiation Force Impulse imaging. The study aimed to establish liver stiffness measurement scores using FibroScan® and Acoustic Radiation Force Impulse in a chronic hepatitis C cohort and to explore the correlation and agreement between the scores and the factors influencing agreement.
    UNASSIGNED: Patients had liver stiffness measurements acquired with FibroScan® (right lobe of liver) and Acoustic Radiation Force Impulse (right and left lobe of liver). We used Spearman\'s correlation to explore the relationship between FibroScan® and Acoustic Radiation Force Impulse scores. A Bland-Altman plot was used to evaluate bias between the mean percentage differences of FibroScan® and Acoustic Radiation Force Impulse scores. Univariable and multivariable analyses were used to assess how factors such as body mass index, age and gender influenced the agreement between liver stiffness measurements.
    UNASSIGNED: Bland-Altman showed the average (95% CI) percentage difference between FibroScan® and Acoustic Radiation Force Impulse scores was 27.5% (17.8, 37.2), p  < 0.001. There was a negative correlation between the average and percentage difference of the FibroScan® and Acoustic Radiation Force Impulse scores ( r (95% CI) = -0.41 (-0.57, -0.21), p < 0.001), thus showing that percentage difference gets smaller for greater FibroScan® and Acoustic Radiation Force Impulse scores. Body mass index was the biggest influencing factor on differences between FibroScan® and Acoustic Radiation Force Impulse (r = 0.12 (0.01, 0.23), p = 0.05). Acoustic Radiation Force Impulse scores at segment 5/8 and the left lobe showed good correlation (r (95% CI) = 0.83 (0.75, 0.89), p < 0.001).
    UNASSIGNED: FibroScan® and Acoustic Radiation Force Impulse had similar predictive values for the assessment of liver stiffness in patients with chronic hepatitis C infection; however, the level of agreement varied across lower and higher scores.
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  • 文章类型: Journal Article
    目的:探讨剪切波弹性成像(SWE)评估儿童肝纤维化程度的临床应用。
    方法:为了探讨SWE在评估儿童肝纤维化中的价值,研究了胆道系统或肝脏疾病患儿的弹性成像值与肝纤维化的METAVIR分级之间的相关性。有显著肝脏肿大的儿童被纳入研究,并对纤维化分级进行分析,以探讨SWE在评估肝纤维化程度时的价值。
    结果:共招募了160名患有胆汁系统或肝脏疾病的儿童。从F1期到F4期肝活检的受试者工作特征曲线(AUROC)下面积分别为0.990、0.923、0.819和0.884。根据肝活检时的肝纤维化程度,SWE值与肝纤维化程度高度相关(相关系数0.74)。肝脏杨氏模量值与肝纤维化程度无显著相关性(相关系数0.16)。
    结论:SupersonicSWE通常可以准确评估肝病患儿的肝纤维化程度。然而,当肝脏明显增大时,SWE只能根据杨氏模量值评估肝脏硬度,肝纤维化程度仍需通过病理活检来确定。
    To explore the clinical application of shear wave elastography (SWE) in evaluating the degree of liver fibrosis in children.
    To explore the value of SWE in assessing liver fibrosis in children, the correlation between elastography values and the METAVIR grade of liver fibrosis in children with biliary system or liver diseases was studied. Children with significant liver enlargement were enrolled, and the fibrosis grade was analyzed to explore the value of SWE in assessing the degree of liver fibrosis in the presence of significant liver enlargement.
    A total of 160 children with bile system or liver diseases were recruited. The areas under the receiver operating characteristic curve (AUROCs) for liver biopsy from stage F1 to F4 were 0.990, 0.923, 0.819, and 0.884. According to the degree of liver fibrosis at liver biopsy, there was a high correlation between the SWE value and the degree of liver fibrosis (correlation coefficient 0.74). There was no significant correlation between the Young\'s modulus value of the liver and the degree of liver fibrosis (correlation coefficient 0.16).
    Supersonic SWE can generally accurately evaluate the degree of liver fibrosis in children with liver disease. However, When the liver is significantly enlarged, SWE can only evaluate liver stiffness based on Young\'s modulus values, and the degree of liver fibrosis must still be determined by pathologic biopsy.
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  • 文章类型: Journal Article
    (1)背景:患有新型冠状病毒2019(COVID-19)疾病的患者可能会经历几次肺外受累,包括心血管并发症和肝损伤。这项研究旨在使用经胸超声心动图(TTE)和肝脏弹性成像(LE)评估急性COVID-19综合征后患者心脏和肝脏改变的存在。(2)方法:共有97名从COVID-19中康复的受试者,在急性疾病后3至11周就诊于医院的专科门诊,包括在这项研究中。他们都有基础的COVID-19评估,随后,临床评估,实验室测试,TTE,和LE。(3)结果:考虑到COVID-19期间存在肺损伤,将患者分为两组。尽管他们都没有改变收缩功能,我们证实了肺动脉高压,舒张功能障碍,肝脏硬度增加,粘度,大约三分之一的病人有脂肪变性,与没有肺损伤的受试者相比,有明显更高的值。(4)结论:以急性COVID-19综合征为特征的持续症状可以通过残留的心脏和肝脏病变来解释,在更严重的COVID-19形式中,情况更糟。这些患者可能有发生肝纤维化和心脏改变的风险,应在感染发作后的前12周内进行调查。
    (1) Background: Patients suffering from the novel coronavirus 2019 (COVID-19) disease could experience several extra-pulmonary involvements, including cardiovascular complications and liver injury. This study aims to evaluate the presence of cardiac and liver alterations in patients with post-acute COVID-19 syndrome using transthoracic echocardiography (TTE) and liver elastography (LE). (2) Methods: A total of 97 subjects recovering from COVID-19, attending the hospital\'s specialized outpatient clinic for persisting symptoms at 3 to 11 weeks after the acute illness, were included in this study. They all had a basal COVID-19 assessment, and subsequently, a clinical evaluation, laboratory tests, TTE, and LE. (3) Results: considering the presence of pulmonary injury during COVID-19, patients were divided into two groups. Although none of them had altered systolic function, we evidenced pulmonary hypertension, diastolic dysfunction, increased liver stiffness, viscosity, and steatosis in around one-third of the patients, with significantly higher values in subjects with pulmonary injury compared to those without. (4) Conclusion: persisting symptoms characterizing the post-acute COVID-19 syndrome could be explained by residual cardiac and hepatic lesions, which were worse in more severe COVID-19 forms. These patients may be at risk of developing liver fibrosis and cardiac alterations and should be investigated in the first 12 weeks after the onset of the infection.
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  • 文章类型: Journal Article
    We performed an epidemiologic study to assess the prevalence of chronic viral hepatitis in inflammatory bowel disease (IBD) and to detect their possible relationships. Methods: It was a single centre cohort cross-sectional study, during October 2016 and October 2017. Consecutive IBD adult patients and a control group of non-IBD subjects were recruited. All patients underwent laboratory investigations to detect chronic hepatitis B (HBV) and C (HCV) infection. Parameters of liver function, elastography and IBD features were collected. Univariate analysis was performed by Student\'s t or chi-square test. Multivariate analysis was performed by binomial logistic regression and odds ratios (ORs) were calculated. We enrolled 807 IBD patients and 189 controls. Thirty-five (4.3%) had chronic viral hepatitis: 28 HCV (3.4%, versus 5.3% in controls, p = 0.24) and 7 HBV (0.9% versus 0.5% in controls, p = 0.64). More men were observed in the IBD-hepatitis group (71.2% versus 58.2%, p < 0.001). Patients with IBD and chronic viral hepatitis had a higher mean age and showed a higher frequency of diabetes, hypertension and wider waist circumference. They suffered more frequently from ulcerative colitis. Liver stiffness was greater in subjects with IBD and chronic viral hepatitis (7.0 ± 4.4 versus 5.0 ± 1.2 KPa; p < 0.001). At multivariate analysis, only old age directly correlated with viral hepatitis risk (OR = 1.05, 95%CI 1.02-1.08, p < 0.001). In conclusion, the prevalence of HBV/HCV in IBD is low in our region. Age may be the only independent factor of viral hepatitis-IBD association. Finally, this study firstly measured liver stiffness in a large scale, showing higher values in subjects with both diseases.
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  • 文章类型: Journal Article
    Background: Non-alcoholic fatty liver disease is the most common cause of liver-related morbidity and mortality in the world. However, no effective pharmacological treatment for this condition has been found. Purpose: This study evaluated the effect of a nutraceutical containing bioactive components from Bergamot citrus and wild cardoon as a treatment for individuals with fatty liver disease. The primary outcome measure was the change in liver fat content. Methods: A total of 102 patients with liver steatosis were enrolled in a double-blind placebo controlled clinical trial. The intervention group received a nutraceutical containing a Bergamot polyphenol fraction and Cynara Cardunculus extract, 300 mg/day for 12 weeks. The control group received a placebo daily. Liver fat content, by transient elastography, serum transaminases, lipids and glucose were measured at the baseline and the end of the study. Results: We found a greater liver fat content reduction in the participants taking the nutraceutical rather than placebo (-48.2 ± 39 vs. -26.9 ± 43 dB/m, p = 0.02); The percentage CAP score reduction was statistically significant in those with android obesity, overweight/obesity as well as in women. However, after adjustment for weight change, the percentage CAP score reduction was statistically significant only in those over 50 years (44 vs. 78% in placebo and nutraceutical, respectively, p = 0.007). Conclusions: This specific nutraceutical containing bioactive components from Bergamot and wild cardoon reduced the liver fat content during 12 weeks in individuals with liver steatosis over 50 years. If confirmed, this nutraceutical could become the cornerstone treatment of patients affected by liver steatosis. Clinical Trial Registration: www.isrctn.com, identifier ISRCTN12833814.
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  • 文章类型: Journal Article
    BACKGROUND: Hepatic dysfunction can contribute to the clinical outcome of patients with end-stage chronic heart failure (HF). This pilot study evaluated the importance of liver stiffness (LS) measurements by acoustic radiation force impulse (ARFI) imaging elastography in patients with end-stage chronic HF who underwent left ventricular assist device (LVAD) implantation.
    METHODS: The study enrolled 28 patients (23 men), mean age of 54 ± 11 years, with end-stage chronic HF selected for LVAD implantation. At baseline, all patients received LS measurements using ARFI elastography. Hepatic venous pressure gradient measurements and transjugular liver biopsies were performed in 16 patients. Liver stiffness was measured 21 days (Follow-up 1, n = 23) and 485 ± 136 days (Follow-up 2, n = 13) after LVAD implantation. Patients were classified according to their baseline LS into Group I (low baseline LS [no significant fibrosis = Metavir F < 2]) or Group II (high baseline LS [significant fibrosis = Metavir F ≥ 2]).
    RESULTS: LS at baseline was higher in Group II than in Group I (p < 0.001) and decreased significantly after LVAD implantation (Follow-up 1, p = 0.002; Follow-up 2, p = 0.002). Baseline LS correlated with liver fibrosis (p = 0.049) and central venous pressure (p = 0.001). Non-survivors showed higher LS (p = 0.019), bilirubin (p = 0.018), Model for End-Stage Liver Disease score (p = 0.001), and liver fibrosis (p = 0.004) compared with the survivors. In the univariate analysis, LS was a significant factor (p = 0.017) in predicting survival after LVAD implantation.
    CONCLUSIONS: ARFI elastography shows that LS is influenced by central venous congestion and histologic changes of the liver in patients with end-stage chronic HF. LS may predict the outcome in patients after LVAD implantation.
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