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Ankle Brachial lndex (ABl)
An Ankle–Brachial Index test (also called an ABI test or ankle and arm blood pressure test) checks the blood flow in your legs. It does this by measuring the blood pressure in your arms and your ankles and comparing the two. An ABI test is often done together with a lower limb arterial scan to help find any blockages or poor circulation in your legs.
An ABI test is simple, quick, and painless. It helps your doctor understand how well blood is moving through the arteries in your legs. Good blood flow is important because it keeps your muscles and tissues healthy. If the ABI test shows a problem, your doctor can plan the right treatment early.
We use the Ankle–Brachial Index test often because it is a trusted way to check for peripheral artery disease (PAD), which is when the arteries in your legs become narrow or blocked. This test gives clear results and helps your doctor make safe, informed decisions about your care.
Why an ABI Test Matters
- It shows how well blood flows to your legs
- It helps find early signs of artery problems
- It supports accurate diagnosis when paired with a lower limb arterial scan
- It is fast, safe, and non‑invasive
What is an ABI test?
An ABI test is a simple check that compares the blood pressure in your arms and ankles to see how well blood flows to your legs.
Why do I need an ABI test?
You may need an ABI test if you have leg pain, slow‑healing wounds, or if your doctor wants to check for poor circulation or peripheral artery disease.
Is an ABI test painful?
No. An ABI test feels like having your blood pressure taken in two places — your arms and your ankles.
How long does an ABI test take?
Most ABI tests take about 15 minutes.
What does an ABI test show?
It shows whether the arteries in your legs are open and healthy or if there may be narrowing or blockages.
Is an ABI test done with a leg artery scan?
Yes, it is often done together with a lower limb arterial scan to give a clearer picture of your leg circulation.
What preperation is required?
There is no specific preperation required for an ABI test.
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