[Experimental study of hepatic inflow occlusion in extrahepatic obstructive jaundice--effects on systemic and hepatic hemodynamics and oxygen metabolism].

The effect of clamping both the hepatic artery and portal vein for 20 min in extrahepatic obstructive jaundice on systemic and hepatic hemodynamics and oxygen metabolism were studied in dogs, and the following results was obtained. 1) Dogs with obstructive jaundice were in a hyperdynamic state before hepatic inflow occlusion, showing an increased demand for oxygen in the liver. 2) After declamping, cardiac index and systemic oxygen delivery were decreased in normal dogs, but a further decrease was found in dogs with jaundice. 3) After declamping, hepatic arterial blood flow was increased in normal dogs. Portal blood flow was decreased just after declamping, but was soon restored. In dogs with jaundice, hepatic arterial blood flow increased to a lesser extent, and recovery of portal blood flow was delayed. 4) Hepatic oxygen consumption and oxygen extraction ratio were already increased markedly just after declamping in normal dogs, whereas the degree of the increase in these parameters was much smaller in dogs with jaundice. Thus, hepatic inflow occlusion in extrahepatic obstructive jaundice induces evident disorder of hepatic oxygen metabolism, and is suggested to be dangerous.