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Liver function test Explanation & Calculation

Liver Function Test Explanation & Calculation

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Liver function test (LFT); liver function panel (LFP);hepatic function test

The liver plays an important role in digestion, detoxification, and elimination of substances from the body, as well as in metabolism.
Liver functblood tests that can be used to monitor the health of your liver. A series of special tests measure the levels ofion tests are  certain enzymes and proteins in your blood.They can often determine whether or not the liver is inflamed, injured, or functioning properly.
The common liver function tests typically include aspartate transaminase (AST) and alanine transaminase (ALT), total protein and albumin,alkaline phosphatase (ALP), ,gamma-glutamyl transferase (GGT), serum bilirubin, prothrombin time (PT),Lactate dehydrogenase(LDH).
In some cases you may need to avoid food or certain medications before the test.Ask the doctor what you need to do to prepare.

The normal range for liver function tests

Aspartate transaminase (AST) 8 to 33 U/L(units per liter)
Alanine transaminase(ALT) 7 to 56 U/L(units per liter)
Total protein. 6 to 8.3 g/dL(grams per deciliter)
Albumin 3.5 to 5.5 g/dL(grams per deciliter)
Alkaline phosphatase(ALP) 30 to 117 U/L(units per liter)
Gamma-glutamyl transferase (GGT) 5 to 40 U/L(units per liter)
Serum bilirubin. 0.1 to 1.2 mg/dL(milligrams per deciliter)
Direct bilirubin 0 to 0.3 mg/dL(milligrams per deciliter)
Prothrombin time(PT)9.4 to 13 seconds
Lactate dehydrogenase (LDH) 140 to 280 U/L(units per liter)

Top Use:    Calculate blood chemistry test - Test name:Direct bilirubin Result:12mg/dL

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