Although transaminases exist in liver cells, when liver cells have inflammation, poisoning or necrosis, it will cause damage to liver cells and transaminases will be released into the blood, which will raise serum transaminases. However, in some special cases, such as liver failure, sometimes the transaminases may not be elevated, but only the bilirubin is elevated and the albumin is decreased. Therefore, the indicators of liver function should be analyzed and judged comprehensively. In addition to transaminase, liver enzymes such as glutamyl transaminase, glutamyl transpeptidase and cholinesterase need to be analyzed and judged comprehensively.