How much blood is drawn for liver function test

Before we go to a new school or enter a new unit, we usually need to undergo a physical examination. The most important point in the physical examination is the blood test, because the blood test can detect diseases in our liver function. Many liver function diseases are contagious. This can not only help patients discover the disease but also prevent the spread of the disease. So how much blood should be drawn for liver function tests?

1. How much blood should be drawn for liver function test?

In most cases, the blood output during liver function tests is around 20 mm. In fact, whether it is a normal physical examination or some physical discomfort, the first examination after going to the hospital must be a routine blood test, and the amount of blood collected is often relatively small, which can be ignored for both adults and children.

2. What are the liver function tests?

2.1. Items to check liver synthesis function: total protein, albumin, total cholesterol, cholesterase, prothrombin time, coagulation factors, etc.

2.2. Items to check for liver parenchymal damage: alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, adenosine deaminase, etc.

2.3. Items for liver tumor examination: alpha-fetoprotein, serum ferritin, α1-antitrypsin, etc.

How much blood is drawn for liver function test

2.4. Check liver fibrosis: hyaluronic acid, monoamine oxidase, type III procollagen peptide, proline peptidase, etc.

2.5. Check the liver's excretion, detoxification and metabolic functions: serum total bilirubin, blood ammonia, serum bilirubin.

3. How much does a liver function test cost?

Liver function tests are used to determine the extent of liver tissue damage and to identify the cause of liver damage. They are widely used. Generally speaking, the cost of liver function tests will be determined based on the disease being examined. Because different diseases are examined, different liver function test indicators are selected, so the cost of liver function tests will be different.

Liver function tests are performed during treatment to understand the progression of the patient's disease and to control the patient's condition. This can effectively help understand the effectiveness of the treatment, analyze how to further treat the patient, and improve the rate of negative conversion to treatment. Therefore, hepatitis B patients should actively cooperate with doctors and do liver function tests. Spending a few dozen more dollars can effectively cure the disease, avoid wasting money, and save a lot of unnecessary expenses.

How much blood is drawn for liver function test

Things to note before liver function tests

1. Remember to fast before the examination: Hepatitis B patients are prone to metabolism, which generally has a certain impact on transaminase while checking liver function, which can cause a slight increase in serum transaminase. At the same time, some substances are absorbed into the blood through the digestive tract after eating, causing changes in blood components, and blood sugar, oxides and lipids will also increase.

2. Avoid taking certain medications: Before checking liver function, you should be careful not to take certain medications, because taking some medications may affect the accuracy of liver function tests. For example: taking vitamin D, adriamycin and other drugs will affect the determination of bilirubin, taking opioid-containing drugs can lead to increased transaminase activity, etc.

3. Avoid certain foods: The day before checking liver function, it is best not to eat foods rich in carotene and lutein, because these foods will make the serum yellow and affect the determination of bilirubin. High-fat foods, such as milk, egg products, etc., may significantly increase blood lipids. Therefore, you must avoid eating fatty meals 10 hours before blood collection. Do not drink alcohol before liver function tests, as alcohol can slightly increase serum transaminase.