Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"portal vein"”.
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Advantages of MesoRex shunt compared with distal splenorenal shunt for extrahepatic portal vein occlusion in children
Background: Portal hypertension (PH) is a common complication of chronic liver or portal vein pathology in children. It is defined as a pathological increase in the pressure of the portal venous system. There are two leading causes for PH in children, pre and post sinusoidal liver disease and …
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Studies on the stimulant action of human gamma-globulin on spontaneous contractility: interaction with K⁺-channel openers and postaglandin inhibitors
… the spontaneous activity of the rat mesenteric portal vein. Previous studies in our laboratory have identified human gamma-globulin and IgG as stimulatory factors which may be responsible for the smooth muscle abnormality associated with the etiology of essential hypertension (Pillai, 1989). …
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Development of the Passive Perfusion Probe for Non-Invasive Blood Perfusion Measurement
… by temporarily occluding blood flow through the portal vein. The phantom tissue tests indicated that the probe can be used to detect small changes in perfusion (0.009 ml/ml/s). The probe qualitatively tracked the changes in the perfusion of the liver model due to occlusion of the portal vein.
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Splenic and portal venography
… by anastomosing the splenic to the left renal vein, or the portal vein to the inferior vena cava. In the same year Whipple (1945) classified portal hypertension into cases with an obstruction in the portal system outside the liver, and those with a block inside the liver, the result of hepatic …
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The Effects of Carbadox, a Synthetic Antimicrobial Agent, on Bile Acid Metabolism in The Domestic Pig
… to place indwelling catheters into the hepatic portal vein (HP) which allowed multiple sampling of the blood and did not affect the performance of the pigs. An indwelling catheter was also placed in the anterior vena cava vein (VC).
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Regulation of the myogenic response and stretch-induced calcium signaling in the vascular wall: Novel insights into the role of microRNAs and protein tyrosine kinase 2
… of myosin light chain kinase. Furthermore portal veins of miRNA-143/145 KO mice exhibit lack of stretch-induced contractile differentiation, which may in part be due to a reduced expression of L-type calcium channels caused by an increased expression of the transcriptional repressor DREAM. …
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Investigations into the Actions of Vasopressin Histamine, Isoproterenol, Phentolamine, Phenylephrine, and Propronalol on Flow Through Perfused Rat Livers
… and perfused at a constant rate through the portal vein with different drugs and at different concentrations. Absolute pressure and change of weight were recorded continuously. Findings. No consistent effects were found with the methods employed. Several factors were not important to this …
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Improvement of liver transplantation by reducing preservation-reperfusion injury
… via the hepatic artery and venous blood via the portal vein. The reperfusion injury which occurs after ischemia, has been studied to only a limited extent in the liver. In particular, the relative contribution of the portal venous blood and the hepatic arterial blood to the reperfusion injury has …
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The effect of prior exercise on postprandial lipaemia
… lipaemia, also increases postprandial hepatic portal vein and femoral artery blood flow. The general message from this thesis is that moderate-intensity aerobic exercise should be advocated as a strategy to lower cardiovascular disease risk, based on experimental evidence that postprandial …
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Free and peptide amino acid fluxes across the mesenteric and non-mesenteric viscera of sheep and calves
… cannulated in the abdominal aorta, mesenteric vein and portal vein. All animals were fed an orchardgrass, corn, SBM-based diet. The steers received three abomasal infusions; a control solution, and an amino acid mixture simulating casein and casein each at a rate equivalent to 25% of daily …
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Effects of Early Cirrhosis on Hepatic Vascular Resistance in the Rat
… aerated Locke's solution through the hepatic portal vein, using 13 different flow rates. Portal pressures at these flow rates were recorded continuously. Resistances were calculated as the ratio of pressure to flow rate, for each of three groups of livers: those from uninjected control rats, …
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The relative roles of portal hypertension and of cirrhosis in the pathogenesis of pulmonary lesions associated with chronic liver disease
… abnormalities in patients with cirrhosis and portal hypertension. The role of portal hypertension in the pathogenesis of pulmonary abnormalities in patients with liver disease has not been defined. The present study was therefore undertaken to clarify this. Pulmonary function, including …
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A Study on the Modes of Action of Angiotensin on Isolated Smooth muscle Preparations
… strip, rat colon, rabbit aortic strip or rat portal vein preparations. The biphasic actions of angiotensin were examined using known pharmacological blocking agents in selective concentrations. The results obtained suggest that the receptors for angiotensin are probably different in the same …
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Portal hypertension in cirrhosis and its associated pulmonary vascular disorders
… increasing year on year. Cirrhosis, through portal hypertension (PH), leads to complications, including pulmonary vascular disorders, portopulmonary hypertension (PoPH), and hepatopulmonary syndrome (HPS). PoPH and HPS are poorly characterised and associated with a worse prognosis in …
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Movement of plasma free, erythrocyte free, peptide and serum protein amino acids across the gastrointestinal tract and liver of calves
… surgically equipped with cannulae in the aorta, portal vein and hepatic vein were maintained under constant light and fed a natural diet as 24 hourly meals per day. Blood was obtained simultaneously from all cannulae at 9 to 12 d postsurgery during the midpoint of a 1-hr feeding interval and …
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An investigation of liver blood flow in systemic inflammation
… but the relative inaccessibility of the portal vein and the hepatic artery has made this a difficult task. The few studies that have been performed in critically ill patients have used the Fick principal to allow estimation of total liver blood flow by clearance of a marker in the blood …
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Dipeptidyl Peptidase-4 in Cariometabolic Disease
… increased incretin hormone bioactivity in the portal vein, which was associated with reduced HGP. Liver fibrosis and gene expression of immune-related pathways were increased in aged, obese Dpp4-/- mice, however liver steatosis and plasma lipids were unchanged. Conversely, expression of …
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