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Liver stiffness in hepatocellular carcinoma and chronic hepatitis patients:Hepatitis B virus infection and transaminases should be considered
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作者 Jia-Yao Huang jian-yun peng +5 位作者 Hai-Yi Long Xian Zhong Yu-Hua Xie Lu Yao Xiao-Yan Xie Man-Xia Lin 《World Journal of Hepatology》 2024年第7期1018-1028,共11页
BACKGROUND Liver condition is a crucial prognostic factor for patients with hepatocellular carcinoma(HCC),but a convenient and comprehensive method to assess liver condition is lacking.Liver stiffness(LS)measured by t... BACKGROUND Liver condition is a crucial prognostic factor for patients with hepatocellular carcinoma(HCC),but a convenient and comprehensive method to assess liver condition is lacking.Liver stiffness(LS)measured by two-dimensional shear wave elastography may help in assessing liver fibrosis and liver condition.Chronic hepatitis B(CHB)is an important risk factor for HCC progression,but LS was found to be less reliable in assessing liver fibrosis following hepatitis viral eradication.We hypothesize that the status of hepatitis virus infection would affect the accuracy of LS in assessing the liver condition.AIM To test the feasibility and impact factors of using LS to assess liver condition in patients with HCC and CHB.METHODS A total of 284 patients were retrospectively recruited and classified into two groups on the basis of serum CHB virus hepatitis B virus(HBV)-DNA levels[HBV-DNA≥100.00 IU/mL as Pos group(n=200)and<100.00 IU/mL as Neg group(n=84)].Correlation analyses and receiver operating characteristic analyses were conducted to evaluate the relationship between LS and liver condition.RESULTS A significant correlation was found between LS and most of the parameters considered to have the ability to evaluate liver condition(P<0.05).When alanine aminotransferase(ALT)concentrations were normal(≤40 U/L),LS was correlated with liver condition indices(P<0.05),but the optimal cutoff of LS to identify a Child-Pugh score of 5 was higher in the Neg group(9.30 kPa)than the Pos group(7.40 kPa).When ALT levels were elevated(>40 U/L),the correlations between LS and liver condition indices were not significant(P>0.05).CONCLUSION LS was significantly correlated with most liver condition indices in patients with CHB and HCC.However,these correlations varied according to differences in HBV-DNA and transaminase concentrations. 展开更多
关键词 Liver function Liver stiffness ELASTOGRAPHY Chronic hepatitis B Hepatocellular carcinoma
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混合气体气水分离过程中节流装置的建模方法及仿真分析(英文)
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作者 易俊 张宝 +5 位作者 于银华 张亚杰 彭建云 陈庆 魏军会 李见 《机床与液压》 北大核心 2019年第12期107-114,共8页
从天然气中分离水分是一个复杂过程,气体混合只有通过节流效应才能使其温度达到露点以分离水分和碳氢化合物,而节流装置参数识别和分析的准确性将直接影响分离效果,因此通过研究气流通过节流阀时保持气流畅通的流动条件,在临界状态下通... 从天然气中分离水分是一个复杂过程,气体混合只有通过节流效应才能使其温度达到露点以分离水分和碳氢化合物,而节流装置参数识别和分析的准确性将直接影响分离效果,因此通过研究气流通过节流阀时保持气流畅通的流动条件,在临界状态下通过Saint-Venant-Wantzel方程在高压条件下建立了通过节流阀气体的流动模型。同时,基于通道中"节流阀横截面面积/流体温度的值"和"节流阀横截面面积/流速的值"的互连控制,研究了节流阀横截面积值对湿度LTS下节流量的速率和温度之间的非线性特性,明确该条件下气水分离的条件限制,最终建立了亚临界状态下节流装置静态模型。在ANSYS环境下对节流效应下的流体进行仿真实验,仿真结果表明:在节流阀的不同初始参数设定下,提出的模型均能对节流阀参数进行准确识别,并能在亚临界模式下对限制性条件做出正确的分析。 展开更多
关键词 亚临界状态 气体流动模型 节流装置 流体参数 露点温度
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