Because the liver bears many responsibilities in the body, there are many test items for liver function tests. In clinical medicine, doctors will first select some symbolic and basic liver function test items for basic detection and analysis, and the seven items of liver function test are common items in liver function tests. So, what does the seven-item liver function test check?

1. Alanine aminotransferase ALT: the standard value is 5-40U/L, it is a key indicator for diagnosing liver essence damage, and its level is usually parallel to the severity of the condition.

2. Aspartate aminotransferase AST: the standard value is 0-40U/L, it mainly exists in the membrane proteins of the liver, so when its components increase, it generally indicates severe liver damage, and it may have liver necrosis. Sometimes, it is a sign of liver cirrhosis.

3. Total bilirubin TBil in blood cells, the standard value is 1.7-17.1μmol/L, mainly composed of direct bilirubin and indirect bilirubin, and is a test that reflects the liver’s metabolic working capacity.

4. Aspartate/Alanine aminotransferase ratio: the standard value is 1.0-1.5, when the proportion is below 1, it is called inversion, and it is one of the characteristics of chronic hepatitis or liver cirrhosis.

5. Gamma-glutamyl transferase GGT: the standard value is 0-40U/L, the increase of this enzyme component is often seen in chronic liver cirrhosis and acute hepatitis, and it continues to rise when liver cancer occurs.

6. Alkaline phosphatase AKP: the standard value is 30-90U/L, when its components increase, it is necessary to conduct a judgment based on the integration of other items.

7. Serum total protein TP, the standard value is 60-80g/L, mainly composed of albumin and globulin in the human body, and is a test that reflects the liver’s reserve working capacity.