FibroScan & Liver Assessment

Non-invasive liver testing

What FibroScan is

FibroScan is the widely used brand name for transient elastography, a technique that measures how stiff the liver is. A stiff liver usually contains more scar tissue (fibrosis), and the degree of fibrosis is the single most important factor determining the long-term outlook in chronic liver disease.

The examination uses a probe placed on the skin over the liver, in the right upper abdomen. The probe sends a painless mechanical pulse through the liver and measures how fast it travels — faster in a stiff, scarred liver, slower in a soft, healthy one. The result is reported as a value in kilopascals (kPa). Modern machines also measure the controlled attenuation parameter (CAP), which estimates the amount of fat in the liver. The whole test usually takes about ten minutes.

Why it matters

Before elastography, assessing the degree of liver scarring usually meant a liver biopsy — a needle through the skin into the liver, with a small but real risk of bleeding and pain, and a result that reflects only a tiny sample of the organ. FibroScan replaced that for most patients: it is painless, quick, takes a measurement from a much larger volume of liver than a biopsy needle does, and can be repeated safely over time to track whether the liver is improving or worsening.

What it is used for

• Staging fatty liver disease
• Fibrosis in chronic hepatitis B or C
• Alcohol-related liver disease
• Detecting advanced fibrosis early
• Tracking response to weight loss or treatment
• Abnormal liver tests of uncertain cause
• Liver involvement in diabetes or metabolic syndrome
• Pre-operative liver assessment

What the numbers mean

• Low kPa values generally indicate little or no significant fibrosis.
• Intermediate values suggest some fibrosis and usually indicate a need for closer monitoring.
• High values raise concern for advanced fibrosis or cirrhosis, and prompt further assessment — typically including endoscopy to look for varices and regular liver cancer surveillance.
• CAP values give a separate estimate of liver fat, which helps confirm fatty liver objectively.

The exact thresholds depend on the cause of the liver disease, your age and other factors, and results are always interpreted alongside your blood tests, imaging and clinical history. A FibroScan number on its own is not a diagnosis, and it should not be treated as one.

How the test is done

• No fasting is required in most cases. You may be asked to fast for a few hours if specifically instructed.
• No sedation and no needle. You remain awake and can leave immediately afterwards.
• Position: you lie on your back with your right arm raised, and the probe is placed between the ribs over the liver.
• Duration: about ten minutes, sometimes longer if measurements are difficult. Results are available immediately.

Limitations — when it does not work well

FibroScan is excellent but not perfect. Measurement can be difficult or unreliable in the following situations, and in these cases we say so rather than reporting a misleading number:

• Significant ascites (fluid in the abdomen), which prevents the pulse from travelling properly.
• Severe obesity, where chest wall thickness limits transmission — a special XL probe is used where available.
• Very narrow rib spaces, or previous surgery in the area.
• Acute liver inflammation, which can temporarily raise stiffness values and be mistaken for fibrosis.
• Congestive heart failure or cholestasis, both of which can raise liver stiffness for reasons other than fibrosis.

FibroScan as part of a liver assessment

FibroScan is most useful when it is part of a structured assessment rather than a standalone test. The Liver Disease and Cirrhosis Clinic at GastroCare Hospital combines it with your history, examination, blood results and ultrasound, and where appropriate with screening endoscopy for varices. The output is a clear plan: what is causing the liver problem, how advanced it is, what treatment is needed, and how often the measurements should be repeated. See the liver disease and cirrhosis page for the full picture.