The serum IL-6 expression in the death group was higher in this study, which might be due to the following reasons: after liver failure, the liver function was damaged, and the body developed a cascade of inflammatory reactions, in which IL-6 was rapidly synthesised and released into the blood, and the lymphocytes were necrotic due to the gradually aggravating inflammatory reaction, which caused the significant increase of inflammatory factors, and the consequent increase in IL-6 expression [20], [21], [22]. Here, IL6 is linked to liver failure.