Cause hepatic encephalopathy

Hepatic encephalopathy at the etiology of acute hepatic encephalopathy ①: such as the outbreak of severe viral hepatitis, drug-induced hepatitis, chemicals such as carbon tetrachloride or mushroom caused by toxic hepatitis, and acute fatty liver of pregnancy. ② chronic hepatic encephalopathy: seen at the various causes of advanced liver cirrhosis and portal - cavity anastomosis, advanced liver cancer, portal vein thrombosis, as well as any end-stage chronic liver disease. Cause hepatic encephalopathy incentives can be summarized into three areas: ① increase ammonia and other toxic substances nitrogen sources, such as the Progressive excessive protein, gastrointestinal hemorrhage, azotemia, oral ammonium salt, urea, methionine etc.. Constipation is also negative factors that emit toxic substances slow down. ② hypokalemic alkalosis, NH4 + NH3 become easier, resulting ammonia poisoning, often because of the influx or release diuretic ascites caused. ③ add to the damage liver cells, liver function further diminish. For example, surgery, anesthesia, tranquilizers, some anti-tuberculosis drugs, such as infection and hypoxia. In chronic liver disease, can be found in about half of cases of hepatic encephalopathy incentives.