The aim of the study is to evaluate the ability of Doppler ultrasonography of the portal vein and liver stiffness measurement using Transient Elestoghraphy in predicting prescence of gastroesophageal variceal and variceal bleeding in patients with liver cirrhosis
Liver cirrhosis incidence and prevalence have been increasing significantly over the years with varying evolutions of etiologies. It is a major cause of mortality and morbidity throughout the world, causing two million deaths per year worldwide (3.5% of all death) with 50% related to cirrhosis complications and 50% related to Hepatocellular Carcinoma and viral hepatitis infections. Variceal bleeding is among leading causes of death in patients with liver cirrhosis and portal hypertension, In current clinical practice, evaluation of the risk of upper digestive tract bleeding is based on osephagogastroduodenoscopy. Although the occurrence of esophageal varices and the time of gastrointestinal bleeding in portal hypertension cannot be exactly predicted, there are some endoscopic and clinical signs associated with a high risk of bleeding: the size of the esophageal varices, the presence of cherry-red spots (red signs) Recent studies demonstrated that the severity of liver fibrosis, especially the presence of advanced fibrosis defined as stage F3 or F4 fibrosis, is the main driver of prognosis in cirrhosis and the main risk factor for developing not only liver-related events but also extrahepatic complications. Liver stiffness measurement is a widely used non-invasive tool for the diagnosis of liver fibrosis and has high accuracy, and if combined with platelets count, it can be also used to identify patients at high risk for esophageal varices without the need for endoscopic screening. Previous studies have demonstrated that liver stiffness can reflect the prognosis of patients with liver cirrhosis because it can indirectly reflect portal hypertension. Liver stiffness measured using transient elastography has been validated as a prognostic quantitative marker for the occurrence of liver-related complications, survival without liver-related death, and overall survival. However, LSM has not been well-verified in the esophageal variceal rebleeding, which is a critical event. Recent studies indicate also that Doppler ultrasound findings of the portal system and hepatic artery could predict both the presence of varices and the risk of variceal bleeding in patient with portal hypertension and liver cirrhosis.
Study Type
OBSERVATIONAL
Enrollment
100
Abdominal US: for detecting the portal hypertension, splenomegaly and portosystemic abdominal collaterals . Doppler US: detecting the diameter and mean blood flow velocity, blood flow volume, perfusion pressure gradient, congestion index, resistive index, pulsatility index of hepatic artery and platelet count-to-spleen diameter ratio will be performed using logic 10 with a 3.5-MHz duplex convex transducer, in supine position after overnight fasting, with holding their breath in maximal expiration in order to minimize the effect of respiration, body position and postprandial changes on the portal flow Endoscopy : Using Sarin classification ( The presence of esophageal varices, their number, exact location, shape, size and cherry-red spots ) Fibroscan: using the standard-probe, and on a fasting (4 h) patient lying flat on his/her back, with the right arm tucked behind the head to facilitate access to the right upper quadrant.
comparing the ability of ultrasound and transient elastography in detecting presence of gastroesoghageal varices to upper endoscopy in liver cirrhosis
evaluate the ability of Doppler ultrasonography of the portal vein and liver stiffness measurement using Transient Elestoghraphy in predicting prescence of gastroesophageal varices and variceal bleeding in patients with liver cirrhosis
Time frame: baseline
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