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Managing liver cirrhotic complications: Overview of esophageal and gastric varices
Cosmas Rinaldi Adithya Lesmana,Monica Raharjo,Rino A. Gani 대한간학회 2020 Clinical and Molecular Hepatology(대한간학회지) Vol.26 No.4
Managing liver cirrhosis in clinical practice is still a challenging problem as its progression is associated with serious complications, such as variceal bleeding that may increase mortality. Portal hypertension (PH) is the main key for the development of liver cirrhosis complications. Portal pressure above 10 mmHg, termed as clinically significant portal hypertension, is associated with formation of varices; meanwhile, portal pressure above 12 mmHg is associated with variceal bleeding. Hepatic vein pressure gradient measurement and esophagogastroduodenoscopy remain the gold standard for assessing portal pressure and detecting varices. Recently, non-invasive methods have been studied for evaluation of portal pressure and varices detection in liver cirrhotic patients. Various guidelines have been published for clinicians’ guidance in the management of esophagogastric varices which aims to prevent development of varices, acute variceal bleeding, and variceal rebleeding. This writing provides a comprehensive review on development of PH and varices in liver cirrhosis patients and its management based on current international guidelines and real experience in Indonesia.
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K.N. Sharafudeen,A. Adithya,S. Vijayakumar,P. Sudheesh,B. Kalluraya,K. Chandrasekharan 한국물리학회 2011 Current Applied Physics Vol.11 No.4
The nonlinear optical characteristics of some organic materials namely coumarin derivatives [3-[(2E)-3-phenylprop-2-enoyl]-2H-chromen-2-one(Cm1) and 3-{(2E)-3-[4-(dimethylamino)phenyl]prop-2-enoyl}-2H-chromen-2-one (Cm2)] doped in a polymer matrix of polymethylmethacrylate (PMMA) have been studied. The Z-scan study on these composite films reveals that the compounds exhibit a self-focusing effect at 532 nm. The nonlinear absorption coefficient, nonlinear refractive index and second-order molecular hyperpolarizability are measured. The optical power limiting experiment is carried out and it is attributed to reverse saturable absorption due to excited state absorption in the samples. This article also reports the enhancement of third-order nonlinearity by substituting with an electron donor group and hence establishes the electronic nature of nonlinearity.
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