Liver Function Test (LFT)

• A liver function test (LFT) may require fasting
• You may be asked not to eat or drink 10-12 hours prior to your test
• Wear a loose fit shirt with sleeves that can be easily rolled up for blood collection

An LFT test is used to determine the overall health of your liver by measuring levels of several enzymes, bilirubin and proteins made by the liver. Problems within a person’s liver can make them very sick, and can even be life-threatening. LFT test is also known as liver function test, liver chemistries, or liver panel.

How many substance levels can be measured with an LFT test?

An LFT test is capable of determining different substance levels on a single blood sample at the same time. These substances are as follows:

• Total protein: it measures the total amount of protein present in your blood
• Albumin: a protein made by liver
• Bilirubin: a waste product made in the liver
• ALT (alanine transaminase)
• Prothrombin time (PT): a protein associated with blood clotting
• AST (aspartate aminotransferase)
• GGT (gamma-glutamyl transpeptidase)
• Lactate dehydrogenase (LD): an enzyme found in the body's cells
• ALP (alkaline phosphatase)

When is an LFT test done?

An LFT test is ordered by doctors in following situations:

• To diagnose hepatitis B and C.
• To monitor an already existing liver disease.
• If your body is showing symptoms of liver disorder.
• If you drink alcohol.
• If you are suffering from gallbladder disease.
• To keep a check on side effects of certain medications that are known to damage your liver.
• If you have high triglycerides, high blood pressure, diabetes or anemia.

LFT test procedure

An LFT test is usually conducted through the following steps:

• A healthcare professional will clean your skin with an alcohol swab.
• An elastic strap will be tied around your arm to make your veins visible.
• A small needle will be used to draw some blood from your arm, which will be collected in a vial or test tube.
• A bandage with gauze will be placed over the puncture site.

What are the risks of an LFT test?

Blood draws are routine procedures and their side effects are quite rare. However some risks of a liver function test include: hematoma, fainting, infections, or excessive bleeding.

LFT test normal range

LFT test normal range is between 10-40 units/litre for AST and 7-56 for ALT. If your ranges are above or below the normal range there might be a problem with your liver.

LFT test price in Pakistan

The price of LFT test in Pakistan is around Rs. 1,950. The price can vary depending on the lab you choose. However, on oladoc you can avail discounts on lab tests as well.