Hemodynamics and coagulation in experimental auxiliary liver transplantation during fulminant hepatic failure.

In pigs, ischemic liver cell necrosis was induced by 6 hours' occlusion of the hepatic artery and the portal vein 3 days after construction of a side-to-side portacaval shunt and division of the hepatic ligaments. Two thirds of the liver of an MLC-compatible donor was heterotopically transplanted 13 hours (group I), and 3 hours (group II) after induction of liver failure. In group I (N = 11), three animals died of liver failure before or shortly after induction of anesthesia. Of the remaining pigs, two animals survived more than 2 weeks. In group II (N = 10), intraoperative hypotension was prevented by reduction of the interval between liver failure and transplantation and by thermodilution catheter monitored fluid replacement. A significant decrease in cardiac output and an increase of pulmonary and systemic vascular resistance were observed during auxiliary partial liver transplantation (APLT). In the immediate postoperative period, six pigs died of deficiencies in hemostasis that were caused by consumptive coagulopathy related to severe host liver damage rather than fibrinolysis. Two pigs in group II survived in good condition 12 and 42 days after APLT. In the longer surviving pigs of both groups, either the graft or the host liver recovered. Processes that might be responsible for the observed hemodynamic changes and coagulation disorders are discussed. These results indicate that APLT is technically feasible in severely ill pigs with acute hepatic failure.