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Home > Patient & Family Resources > Health Library > Liver Function Tests
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Some blood tests are used to determine whether your liver is damaged or inflamed. Although these tests help your doctor evaluate how well your liver is working, they cannot tell if you have hepatitis C.
Your doctor may do tests to measure certain chemicals produced by the liver. These tests can help your doctor check how well your liver is working.
Tests may measure:
Your liver may be damaged if you have increased levels of:
An increased level of alkaline phosphatase (AP) may indicate blockage of bile ducts.
Liver tests are done when a medical history or physical exam suggests that something may be wrong with your liver.
These tests can also help diagnose long-term (chronic) infection. If liver enzymes are high, a test for hepatitis C antibodies may be done to see if you have hepatitis C.
If you are being treated with antiviral therapy, you may have liver tests from time to time to see whether treatment is working.
In general, there's nothing you have to do before this test, unless your doctor tells you to.
A health professional uses a needle to take a blood sample, usually from the arm.
All levels are within the normal range.
One or more levels are outside the normal range. Abnormal liver function tests may mean that your liver is inflamed or is not working normally. This can be a sign that you have a viral infection.
Current as of:
June 17, 2021
Author: Healthwise StaffMedical Review: E. Gregory Thompson MD - Internal MedicineAdam Husney MD - Family MedicineMartin J. Gabica MD - Family MedicineW. Thomas London MD - Hepatology
Current as of: June 17, 2021
Author: Healthwise Staff
Medical Review:E. Gregory Thompson MD - Internal Medicine & Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine & W. Thomas London MD - Hepatology
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