What is an LFT?
Liver Function Tests (LFTs) are a group of blood tests that evaluate the health and function of your liver. They measure levels of liver enzymes, proteins, and substances like bilirubin to detect liver damage, inflammation, or disease.
Purpose of the Test
- Detect liver diseases such as hepatitis, fatty liver, or cirrhosis
- Monitor side effects of medications affecting the liver
- Track progression of known liver disease
- Assess overall liver function before surgery
Preparation
- Fasting for 8–12 hours may be recommended.
- Avoid alcohol for at least 24 hours before the test.
- Inform your doctor about all medications and supplements.
Procedure
- A blood sample is taken from a vein in your arm.
- The test usually takes just a few minutes.
- Results are typically available within 24 hours.
Parameters Measured
- ALT (Alanine Aminotransferase): Indicates liver cell injury.
- AST (Aspartate Aminotransferase): Also signals liver or muscle damage.
- ALP (Alkaline Phosphatase): Can be elevated in bile duct blockage or bone disease.
- Bilirubin: High levels may indicate jaundice or bile duct problems.
- Albumin & Total Protein: Measure liver's protein production ability.
Risks
- Mild pain or bruising at the puncture site
- Rarely, dizziness or infection
FAQs
- Can LFT detect all liver problems? It can indicate issues but may need further imaging or biopsy.
- How often should I get LFT done? Depends on your health condition and doctor’s advice.
Disclaimer
This page is for informational purposes only and should not replace professional medical consultation. Always follow your healthcare provider’s advice.