<qa>  What is the onset of hepatic encephalopathy?Introduction In the treatment of esophageal varices rebleeding1 and asciteshydrothorax refractory to the diuretic therapy2 by transjugular intrahepatic portosystemic shunt TIPS, shunt stenosis occurring in 30-70 of cases during the first post-procedural year and the onset of hepatic encephalopathy 30-55 of cases at one year represent two major problems. 