Liver function test (LFT test) is also known as the liver panel test or liver chemistries that determine the overall health condition of your liver. This liver test measures various enzymes, proteins, bilirubin, and other substances in your blood. This LFT blood test is also referred by doctors to monitor the progress of an existing liver disease treatment. This test is also performed to screen some diseases, including hepatitis, the severity of liver diseases, side effects of medicines, and so on. If your Liver Function Test Report shows the LFT normal range, it means your liver is working fine.
|Also known as||Liver Function Test, Liver Panel Test, Liver Chemistries|
|Liver function test includes||ALT, AST, ALP, Albumin Test, Bilirubin Test, GGT, LD, PT|
|Preparation||You may need to fast 10-12 hrs. before the test|
|Reporting||Within 24 hrs|
|Test price||The price of this test may vary from city to city and from lab to lab|
|Also included in||Health Insurance Plans|
|Related tests||C-Reactive Protein (CRP), Blood Sugar Test, CBC, Ultrasound, Fibroscan, Liver Biopsy|
What is the LFT Test?
The LFT test monitors the condition of your liver. Under certain situations, this test is recommended by the doctor.
- Certain medical conditions like diabetes, blood pressure, and anemia
- To monitor certain liver diseases like hepatitis B, hepatitis C, cirrhosis, fibrosis, etc.
- If you already have liver disease, this test will help your doctor to monitor the progress of your treatment
- If you have a family history of liver disease like fatty liver disease
- To monitor side effects of certain medications NSAIDs, Statins, antibiotics, tuberculosis drugs, etc.
- If you drink alcohol frequently
- If you have a gallbladder disease
Types of LFT Test
- Alanine Transaminase (ALT): This enzyme presents in your liver and converts proteins into energy for the liver cells. If your liver is damaged, ALT is released into the bloodstream and its level increases.
- Aspartate Transaminase (AST): This enzyme assists in metabolizing amino acids. An increase in AST levels may show liver damage, disease, or muscle damage.
- Alkaline Phosphatase (ALP): This enzyme is present in the liver and bone and is imperative for breaking down proteins. Higher levels of ALP may indicate liver damage or disease.
- Albumin and Total Protein: This protein is made by the liver. Your body requires this protein to fight various infections and to perform other functions.
- Bilirubin: Bilirubin passes through the liver and is expelled in the stool. Elevated levels of bilirubin (jaundice) may indicate liver damage or disease.
- Gamma-Glutamyltransferase (GGT): GGT is an enzyme in the blood. Higher levels of GGT may indicate liver or bile duct damage.
- L-lactate Dehydrogenase (LD): LD usually presents in the liver. An enhanced level of this enzyme may indicate liver damage.
- Prothrombin Time (PT): PT is the time it takes your blood to clot. Increased PT may indicate liver damage but may be enhanced due to several other reasons like blood-thinning drugs, such as warfarin.
LFT Test Normal Range
|ASPARTATE AMINOTRANSFERASE (SGOT)||U/I||Less Than 31|
|ALANINE TRANSAMINASE (SGPT)||U/I||10-28|
|GAMMA-GLUTAMYL TRANSFERASE (GGT)||U/I||<38|
|PROTEIN – TOTAL||gm/dl||5.7-8.2|
|ALBUMIN – SERUM||gm/dl||3.2-4.8|
Liver function test results may vary from lab to lab and might be marginally different for women and children. Depending on your LFT test report, your doctor will decide what treatments you need for your disease.
How do you Prepare for the Test?
Some foods and medications may interfere with the results of your liver function tests. Your doctor will advise you to stay away from eating food and taking some medications before the test.
What Can You Expect from a LFT Test?
During the Test
Once you reach your nearest hospital or lab, a technician will collect the blood sample for liver function tests by inserting a small needle into a vein (preferably from the upper arm). The needle is attached to a small tube where your collected blood will be deposited. You may experience sharp pain when the needle is inserted into your arm.
After the Test
Your sample will be sent to the laboratory for further analysis. You may get the results after some hours.