Clear protein means albumin, albumin in the clinic is mainly includes the following two meanings: 1, serum albumin value, which is a check index of liver function, but also the most important protein in the human body. Its nutritional status for the maintenance of the body and the kidney also has a very important role, but also able to play the function of detoxification, reflecting the synthesis status of the liver. Elevated albumin suggests that there may be overnutrition, severe dehydration, or the presence of multiple myeloma, macroglobulinemia, and so on. The decline of albumin is mainly seen in chronic digestive diseases, such as malignant tumors, severe tuberculosis or liver disease, etc. 2, commonly used in the clinic of human blood albumin, which is extracted from human blood. In clinical practice, it is mainly used for the treatment of shock caused by burns and scalds, intracranial hypertension caused by cerebral edema, ascites or edema caused by cirrhosis or nephropathy, and severe neonatal hyperbilirubinemia, so albumin has to be determined according to the specific circumstances of the specific nature.