LFT Medical Abbreviation: What a Liver Panel Checks

What the LFT medical abbreviation covers

LFTs are not one test but a bundle. The exact list depends on the lab, but most panels include the items below.

Some panels add GGT, another bile duct enzyme. Clotting tests such as PT and INR are often ordered alongside because the liver makes clotting proteins.

Why the name is slightly misleading

Strictly speaking, ALT and AST measure liver cell injury, and alkaline phosphatase points toward the bile ducts. Only albumin, bilirubin and clotting time reflect what the liver actually does, its function. Some teachers prefer the phrase liver chemistries or liver panel for that reason.

The name has stuck anyway, and you will hear LFTs on every hospital ward. Knowing the difference helps when reading a result: a high ALT with normal albumin and INR suggests irritation, while a low albumin and high INR suggest the liver is not keeping up with its work.

Reading an LFTs result line

Printed ranges beside each value come from your particular lab and may shift with age and sex. As a rough guide, many labs list ALT and AST upper limits somewhere around 30 to 50 units per liter. Mildly high values turn up often and frequently settle on their own. Your clinician looks at the size of the rise, the pattern and the trend.

Patterns clinicians look for

Doctors group abnormal LFTs into patterns. A hepatocellular pattern, mostly high ALT and AST, can come from viral hepatitis, fatty liver, alcohol use, some medicines or poor blood flow. A cholestatic pattern, mostly high alkaline phosphatase and bilirubin, suggests bile flow is blocked, for example by gallstones. A mixed pattern shows both.

Many common medicines can nudge liver enzymes, which is why some prescriptions come with LFT monitoring. Acetaminophen in large amounts, certain cholesterol medicines, some antibiotics and some seizure medicines are examples. The decision about any change belongs to the prescriber.

LFTs medical abbreviation in orders and monitoring

Orders often read "LFTs in AM" or "repeat LFTs in 1 week". Medication monitoring plans may say "baseline LFTs before starting". In the US, many electronic systems list the order as hepatic function panel, so a patient might see that name on the lab slip while the doctor's note says LFTs.

In a metabolic panel, liver values share the page with kidney markers like BUN and creatinine. Other related abbreviations sit together in the hub for lab work and imaging.

LFT versus PFT and the outside meaning

In US charts, LFT is almost always the liver panel. Across Britain, Australia and a few other countries, LFT can also mean lung function tests, the breathing tests that American notes call PFTs. If a note from abroad mentions LFTs alongside spirometry or inhalers, that is the likely meaning.