Ankle Brachial Pressure Index (ABPI) Test
Specialist assessment of blood circulation to the legs at our Central London clinic. We offer both resting ABPI and exercise ABPI as standalone tests.
ABPI compares blood pressure measured at the ankles with blood pressure in the arms. It can help assess for peripheral arterial disease (PAD).
Non-invasive pressure measurements to help assess arterial blood supply to the legs.
What is an ABPI test?
The ankle brachial pressure index (ABPI), also called the ankle brachial index (ABI), is a non-invasive test comparing systolic blood pressure at the ankle with blood pressure in the arm.
The measurements provide information about blood supply to the legs and can help identify reduced arterial circulation, including possible peripheral arterial disease (PAD).
ABPI is a pressure-based assessment. It is different from a lower limb arterial duplex ultrasound, which uses ultrasound imaging and Doppler to examine the arteries directly.
Resting ABPI or exercise ABPI?
Both tests assess lower limb circulation, but they answer slightly different clinical questions.
Resting ABPI
Blood pressures are measured at the arms and ankles after a period of rest. The results are used to calculate an ABPI for each leg.
Exercise ABPI
ABPI measurements are compared before and after controlled exercise. This may help investigate exertional leg symptoms when resting results do not explain them.
Choosing the Right Test
The most appropriate examination depends on your symptoms, medical history, ability to exercise and any previous test results.
Why might you need an ABPI test?
An ABPI assessment may be considered when there are concerns about reduced blood supply to the legs.
- Calf, thigh or buttock discomfort brought on by walking
- Leg symptoms that improve after stopping to rest
- Concerns about peripheral arterial disease
- Monitoring arterial circulation when clinically appropriate
- Further assessment after a healthcare professional recommends ABPI
Symptoms alone cannot establish the cause. An ABPI result needs to be interpreted alongside clinical information, and additional tests may be needed.
If you develop sudden severe leg pain, a cold or pale foot, new numbness or weakness, or rapidly worsening symptoms, seek emergency medical assessment rather than waiting for a private ABPI appointment. ABPI is not a substitute for urgent medical care.
What happens during an ABPI test?
Clinical Information
We review the reason for the test, relevant symptoms and any information that may affect the assessment.
Resting Measurements
Blood pressure cuffs and Doppler equipment are used to measure pressures at the arms and ankles.
Exercise, if Booked
For an exercise ABPI, suitable exercise is performed and ankle pressures are reassessed afterwards, where clinically appropriate.
Findings
The measurements are documented and interpreted in the context of the assessment.
What can ABPI tell you?
ABPI helps assess whether arterial blood flow to the legs may be reduced. Exercise measurements can sometimes reveal changes that are not apparent at rest.
Results are not interpreted in isolation. In some people, including those with stiff or poorly compressible arteries, ABPI may be less reliable. Further assessment, such as arterial duplex ultrasound or toe pressure measurements, may be appropriate depending on the findings.
ABPI does not directly image arterial narrowing or identify its exact location.
Private ABPI test prices
Transparent standalone self-pay pricing at our Central London clinic.
Arm and ankle pressure measurements at rest.
Resting measurements and post-exercise reassessment where suitable.
ABPI Testing in London
Tunica Diagnostics
111 Charing Cross Road
London WC2H 0DT
Monday–Saturday · 9am–9pm
Frequently asked questions
What does ABPI stand for?
ABPI stands for ankle brachial pressure index. It is also called the ankle brachial index (ABI).
How much does an ABPI test cost?
Resting ABPI costs £150 and exercise ABPI costs £200 at Tunica Diagnostics.
What is the difference between resting and exercise ABPI?
Resting ABPI compares arm and ankle pressures while you are at rest. Exercise ABPI repeats relevant measurements after exercise to assess changes associated with exertion.
Can I book an ABPI test without a GP referral?
Yes. Self-referrals are welcome. Contact us to discuss which assessment is appropriate for your circumstances.
Is an ABPI test the same as a leg Doppler ultrasound?
No. ABPI uses blood pressure measurements, typically with a handheld Doppler device. A lower limb arterial duplex scan uses ultrasound imaging to assess the arteries and blood flow in more detail.
Can ABPI diagnose peripheral arterial disease?
ABPI can provide evidence supporting a diagnosis of peripheral arterial disease, but results must be considered with symptoms, examination and other clinical findings. Some people need additional testing.
Is exercise ABPI suitable for everyone?
Not always. Exercise testing depends on your mobility, symptoms and medical circumstances. The suitability of the test should be considered before it is performed.
Where is Tunica Diagnostics?
We are located at 111 Charing Cross Road, London WC2H 0DT.
Request an ABPI appointment
Book a resting or exercise ankle brachial pressure index assessment at our Central London clinic.