[Activity of coagulation factors in liver coma caused by viral hepatitis].

Coagulation studies were performed on 8 patients with acute liver failure from viral hepatitis. Four died and four recovered. At the time of development of coma, levels of clotting factors resulted markedly reduced in all cases and were not of value as a prognostic index. Subsequent serial determinations (every 8 hours) during the evolution of coma showed that prothrombin activity and levels of factor I, II, V and X were not correlated with clinical conditions, most probably owing to the influence of the administration of blood and blood components. Of all coagulation tests, the assay of factor VII, which has the shortest half-life, appeared the most reliable index of hepatic synthetic function at a particular point in time.