Biochemical tests are methods that use biochemical methods to detect components and various substances in the blood. There are various clinical blood biochemical tests, the common ones are as follows: a. Lipid tests, including triglycerides, cholesterol and various lipoproteins, etc. Liver function tests, including aminotransferases, bilirubin concentration, alkaline phosphatase and lactate dehydrogenase concentration. Kidney function tests, including creatinine, urea nitrogen, uric acid concentration, etc. Four, also includes a variety of ion examination, potassium ion, calcium ion, sodium ion, chloride ion concentration, etc., and also includes serum iron, ferritin, total iron binding capacity examination, etc. V. It also includes various endocrine examinations, such as the examination of catecholamine concentration, etc.