内科学肝硬化和肝性脑病(英文)
79页1、ARCHITECTURAL LIVER DISRUPTION IS THE MAIN MECHANISM THAT LEADS TO AN INCREASED INTRAHEPATIC RESISTANCE,Liver Cirrhosis,Natural History,Cirrhosis,End stage of any chronic liver disease Characterized histologically by regenerative nodules surrounded by fibrous tissue Clinically there are two types of cirrhosis: Compensated Decompensated,DEFINITION OF CIRRHOSIS,Cirrhosis,Normal,Nodules,Irregular surface,GROSS IMAGE OF A NORMAL AND A CIRRHOTIC LIVER,Cirrhotic liver,Nodular, irregular surface,Nodule
2、s,GROSS IMAGE OF A CIRRHOTIC LIVER,Cirrhosis,Normal,Nodules surrounded by fibrous tissue,HISTOLOGICAL IMAGE OF A NORMAL AND A CIRRHOTIC LIVER,HISTOLOGICAL IMAGE OF CIRRHOSIS,Fibrosis,Regenerative nodule,PATHOGENESIS OF LIVER FIBROSIS,Hepatocytes,Space of Disse,Sinusoidal endothelial cell,Hepatic stellate cell,Fenestrae,Normal Hepatic SInusoid,Retinoid droplets,PATHOGENESIS OF LIVER FIBROSIS,Alterations in Microvasculature in Cirrhosis,Activation of stellate cells Collagen deposition in space of
3、Disse Constriction of sinusoids Defenestration of sinusoids,Normal Liver,Hepatic vein,Sinusoid,Portal vein,Liver,Splenic vein,Coronary vein,THE NORMAL LIVER OFFERS ALMOST NO RESISTANCE TO FLOW,Portal systemic collaterals,Distorted sinusoidal architecture leads to increased resistance,Portal vein,Cirrhotic Liver,Splenomegaly,ARCHITECTURAL LIVER DISRUPTION IS THE MAIN MECHANISM THAT LEADS TO AN INCREASED INTRAHEPATIC RESISTANCE,AN INCREASE IN PORTAL VENOUS INFLOW SUSTAINS PORTAL HYPERTENSION,Mesen
4、teric veins, Flow,Splanchnic vasodilatation,Distorted sinusoidal architechure,Portal vein,An Increase in Portal Venous Inflow Sustains Portal Hypertension,Mechanisms of Portal Hypertension,Pressure (P) results from the interaction of resistance (R) and flow (F):,Portal hypertension can result from: increase in resistance to portal flow and/or increase in portal venous inflow,MECHANISMS OF PORTAL HYPERTENSION,Compensated cirrhosis,Decompensated cirrhosis,Death,Chronic liver disease,Natural Histor
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