When can I have a liver function test?
what is liver function examination
liver function reflects the physiological function of the liver. The purpose of liver function examination is to check whether there is liver disease and the degree of liver damage, find out the cause of liver disease, judge the prognosis and identify the cause of jaundice. Several representative indexes are often selected for liver function examination to understand liver function, such as protein metabolism function test, bilirubin metabolism function test, liver dye excretion test and various serum enzyme tests, including bilirubin, albumin, globulin, transaminase, biliary enzyme, serum ammonia, thrombin time, etc.
the detection of liver function is particularly important for the judgment of liver diseases, such as hepatitis, liver cirrhosis and so on. When these lesions appear in the human body, the metabolic function, immune function and synthetic function of the liver will be damaged first, which will seriously affect human health. Liver function examination can detect these hidden dangers in time and let patients get treatment before their condition worsens further.
but liver function examination also has certain limitations. This examination can only be used as an auxiliary means for the diagnosis of hepatobiliary diseases. When evaluating the results of liver function test, we must comprehensively consider liver function in combination with clinical symptoms and avoid one sidedness and subjectivity.
when can you do liver function examination?
liver function test belongs to blood drawing test. It must be carried out on an empty stomach. The fasting time is generally 8-12 hours. Some doctors measured the activity of serum aminotransferase in patients with hepatitis early, middle and late fasting, and the results showed that it fluctuated greatly. Therefore, it is better to check serum aminotransferase in the morning. In addition, you should ensure enough sleep before the examination, do not overwork, and do not drink the day before the blood collection examination.
routine examination items of liver function
liver function examination is very important for the diagnosis of liver diseases, such as hepatitis and liver cirrhosis. What items does liver function examination have?
1. Examination of hepatocyte injury: including serum enzymes and serum iron, which are commonly detected by serum enzymes, such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ACP), & gamma- Glutamyltranspeptidase (& gamma- GT) wait.
2. Liver excretion function test: detect the excretion and clearance ability of the liver to some endogenous (bilirubin, bile acid, etc.) or exogenous (dyes, drugs, etc.) high intake.
3. Examination of liver reserve function: plasma protein (ALB) and prothrombin time (PT) reflect its reserve ability by detecting liver synthesis function.
4. Liver interstitial change examination: serum protein electrophoresis has basically replaced flocculent turbidity reaction, & gamma- The degree of increased globulin can evaluate the evolution and prognosis of chronic liver disease, suggesting that Kupffer cells have decreased function and can not remove endogenous or intestinal antigen substances in the blood circulation.