View clinical trials related to Portal Hypertension.
Filter by:Early diagnosis of liver fibrosis is useful for the follow-up and treatment of chronic liver disease. At present, the unique validated method to evaluate the liver fibrosis in children, is the liver biopsy which is an invasive method. If the elastometry method is proved to be a good method to evaluate the fibrosis in children, a numerous liver biopsy could be avoided.
Aim To compare Carvedilol with variceal band ligation in the prevention of first variceal bleed. End points of trial Primary: Variceal hemorrhage Secondary: Death Study design Randomised controlled clinical trial. Results analysed for the above end points on an intention-to-treat basis.
The investigators will address the hypothesis that portal hypertension is mediated in part by bacterial or endotoxin translocation and the production of inflammatory mediators (tumor necrosis factor-α (TNFα), etc.). The investigators hypothesize that food supplementation with the probiotic product VSL#3 in patients with Child Pugh B/C cirrhosis will have a beneficial effect on in portal pressure (as measured by the HVPG) by reducing inflammatory mediators and improving systemic and splanchnic hemodynamics.
This study is to evaluate the role of probiotics in the treatment of portal hypertension. In particular the role of probiotics on gut microbiota in liver cirrhosis patients will be studied and compared with cytokines and other substances implicated in the pathogenesis of portal hypertension. The hypothesis whether probiotics may change the prognosis of patients with portal hypertension will be studied. The hypothesis whether probiotics may halt the pathologic cascade of events leading to various complications (e.g. hepato-renal syndrome, spontaneous bacterial peritonitis, bleeding varices) will be reviewed.
The natural history of cirrhosis has a symptomatic and asymptomatic stage. The symptoms include the development of ascites, hepatic encephalopathy, or variceal bleeding. The development of portal hypertension represents a critical transition point in the natural history of cirrhosis, contributing to, or directly responsible for all of these events. It is defined by an increase in intrahepatic vascular resistance to portal venous inflow, with the subsequent development of collateral vessels, such as esophageal or gastric varices. As portal pressures rise over time, however, the resulting increase in variceal size and wall tension translates into an increasing likelihood of rupture and bleeding, leading to death in about 30% of patients. Over the last twenty years, data have emerged regarding the role of tumor necrosis factor (TNFα) in portal hypertension from animal models as well as in vitro experiments. Portal hypertension is a condition characterized by vasodilatation and a hyperdynamic circulation, driven by relative overproduction of nitric oxide23. In animal trials using inhibitors of TNF it has been shown to decrease the development of the hyperdynamic circulatory state and portal pressure.24-25 Based on these data, investigators have examined the role of TNF inhibition with thalidomide. Significant improvement in blocking the development of the hyperdynamic circulation and portal pressures was demonstrated.26 Human trials have also show the efficacy of thalidomide in reducing portal pressures. In that these trials have shown promising results further investigation is
Background: Both endoscopic variceal ligation (EVL) and propranolol are valuable methods for secondary prophylaxis of variceal bleeding. Addition of ISMN to propranolol improves the efficacy of drug therapy. It is hypothesized that a combination of EVL and portal pressure reducing drugs should significantly be better than EVL alone. Patients and Methods: Patients with history of variceal bleed were randomized to EVL plus drugs (propranolol and ISMN) or EVL alone. EVL was repeated every 3-4 weeks until variceal eradication. Propranolol dose was adjusted to reduce the resting heart rate to 55 bpm. Dose of ISMN was 40 mg/d. Primary end points were rebleed or death. Secondary end points included complications of portal hypertension and the development of serious adverse effects to therapy.
The primary purpose of this study is to determine the efficacy and safety of cobiprostone (at two dose levels) as compared to placebo for lowering portal hypertension.
The purpose of this study is to evaluate the effects of continuous simvastatin administration on the hepatic venous pressure gradient (HVPG), as a surrogate marker of prognosis, and its safety in patients with cirrhosis and portal hypertension.
The role of teleradiology has far reaching implications for the health of remote and underserved populations. The ability to coordinate radiographic evaluation and diagnosis from a distance has the potential to raise the standard of patient care throughout the world. Perhaps the safest and most cost effective mode of teleradiology today is telesonography. The current project attempts to determine the extent that telesonography improves the standard of care within a rural government-run primary clinic within the Dominican Republic. The work reported herein is intended to compare the use of telesonography to the current standard of sonographic examination (referral to government hospital 60km from target clinic). The study was conducted by randomly assigning 100 patients with clinical indications for sonographic examination into experimental and control groups. Following a 60-day implementation period, the following research questions will be addressed: 1) To what extent does the use of asynchronous telesonography increase the percentage of definitive diagnoses based on the total number of scans (definitive diagnoses / total number of scans)? 2) To what extent does the use of asynchronous telesonography increase the continuity of care for patients? 3) To what extent does the elapsed time between scanning and final radiological interpretation decrease with the use of asynchronous telesonography? This study will also look at the history of telemedicine / telesonography and its dissemination into the mainstream practice of medicine, explore training protocols that may be used to assist others to establish new telesonography programs in a developing nations, and discuss both advances and persistent barriers to the implementation of telesonography programs. Hypothesis: The use of a store-and-forward telesonography system in this setting will increase the speed and number of final diagnoses per scan received by the target clinic and will increase the continuity of care by increasing the number and speed of follow-up appointments to the target clinic.
Patients with cirrhosis require endoscopic screening for large esophageal varices. The aims of this study were to determine the cost -effectiveness and patient preferences of a strategy employing abdominal computerized tomography (CT) as the initial screening test for identifying large esophageal varices. In a prospective evaluation,102 patients underwent both CT and endoscopic screening for gastroesophageal varices. Two radiologists read each CT independently; standard upper gastrointestinal endoscopy was the reference standard. Agreement between radiologists, and between endoscopists regarding size of varices was determined using kappa statistic. Cost-effectiveness analysis was performed to determine the optimal screening strategy for varices. Patient preference was assessed by questionnaire. CT was found to have an approximately 90% sensitivity in the identification of esophageal varices determined to be large on endoscopy, but only about 50% specificity. The sensitivity of CT in detecting gastric varices was 87%. In addition, a significant additional number of gastric varices, peri-esophageal varices, and extraluminal pathology were identified by CT but not identified by endoscopy. Patients overwhelmingly preferred CT over endoscopy . Agreement between radiologists was good regarding the size of varices (Kappa = 0.56), and exceeded agreement between endoscopists (Kappa = 0.36). Use of CT as the initial screening modality for the detection of varices was significantly more cost-effective compared to endoscopy irrespective of the prevalence of large varices. In conclusion, abdominal CT as the initial screening test for varices could be cost-effective. CT also permits evaluation of extra-luminal pathology that impacts management.