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Liver Function Tests
Liver Function Tests
Test Overview
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.
Tests that assess liver function
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:
- Bilirubin.
- Albumin.
- Total serum protein.
Tests that check for inflammation of the liver (liver enzyme studies)
Your liver may be damaged if you have increased levels of:
- Alanine aminotransferase (ALT or SGPT).
- Aspartate aminotransferase (AST or SGOT).
An increased level of alkaline phosphatase (AP) may indicate blockage of bile ducts.
Why It Is Done
Why It Is Done
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 infections. For instance, when liver enzymes are high, tests may be done to see if you have hepatitis.
If you are taking certain medicines, you may have liver tests to check that the medicine is working or that it is not harming your liver.
How To Prepare
How To Prepare
In general, there's nothing you have to do before this test, unless your doctor tells you to.
How It Is Done
How It Is Done
A health professional uses a needle to take a blood sample, usually from the arm.
Results
Results
Normal
All levels are within the normal range.
Abnormal
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: April 30, 2024
Author: Ignite Healthwise, LLC Staff
Clinical Review Board
All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
This information does not replace the advice of a doctor. Ignite Healthwise, LLC, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.
To learn more about Ignite Healthwise, LLC, visit webmdignite.com.
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