About 10–20 minutes
A short office-based pressure test.
Ankle-Brachial Index
Compare circulation in your arms and ankles.
Leg cramping when you walk, a cold foot, or a slow-healing sore may point to reduced arterial blood flow. The ankle-brachial index (ABI) gives EVSLA a quick, noninvasive first check for Peripheral Arterial Disease—and a clearer direction for what should happen next.
No needles or radiation. The cuffs briefly tighten like a routine blood-pressure measurement, and there is no recovery period.
No needles or radiation
Cuffs and a handheld Doppler measure flow.
A clearer first step
Use the result to guide testing and care.
When Leg Symptoms May Be a Circulation Problem
An ABI is most useful when the result is connected to what you feel, what your specialist finds on examination, and your risk for arterial disease.
Cramping with walking
Pain, tightness, or fatigue in the calf, thigh, or buttock that starts with activity and improves with rest can fit an arterial pattern.
A cold, numb, or weak foot
One lower leg or foot may feel colder, weaker, or less sensitive than the other when blood flow is reduced.
A sore that heals slowly
A wound on the foot, toe, or lower leg that does not improve deserves a circulation assessment as part of the workup.
Skin, nail, or pulse changes
Color change, hair loss, slow nail growth, or a weak foot pulse can add to the reason for testing.
Risk factors that can strengthen the reason to check
DiabetesCurrent or past tobacco useHigh cholesterol or blood pressureKnown heart or vascular disease
A suddenly cold, pale, painful, weak, or numb limb needs immediate medical attention. Do not wait for a routine website consultation if symptoms begin suddenly or a wound appears infected.
Pressure tells a story
The test asks whether blood reaches the ankle with expected pressure.
Two Pressure Checks. One Useful Comparison.
An ABI does not require an IV or scanner. You rest on your back while cuffs and a handheld Doppler measure systolic pressure in both arms and at both ankles.
Begin with a reliable baseline
After a short rest, pressure in the arms provides the reference used for the comparison.
Check both legs
Ankle pressures are measured at foot arteries so each leg can be evaluated separately.
Interpret the result in context
Your specialist connects the ratio with your walking symptoms, pulses, skin, wounds, risk factors, and vascular history.
The ABI finds a pressure difference; it does not map the exact location of a narrowing. If the result or symptoms point to a blood-flow problem, arterial duplex ultrasound or another focused study may be the next step.
Your ABI Result Should Change the Plan
The number matters, but the decision matters more. EVSLA uses guideline-based ranges to decide whether circulation appears reassuring, suggests PAD, or needs a different type of pressure test.
Look at the whole symptom pattern
A resting result in the expected range is reassuring, but persistent walking symptoms may still call for an exercise ABI or another evaluation.
Decide whether stress testing adds clarity
When symptoms appear during walking, repeating the comparison after exercise may uncover a pressure drop that is not present at rest.
Confirm how PAD fits your symptoms
A low ABI supports a diagnosis of Peripheral Arterial Disease. The next step may include medical care, walking therapy, arterial imaging, or treatment planning.
Use a test the arteries can answer
Stiff arteries can make an ABI unreliable. Toe-pressure testing, waveforms, or another study may provide a more useful result.
What Happens During an ABI Test
The visit is straightforward, and you can return to your usual activities immediately afterward. Your care team will tell you if exercise or toe-pressure measurements are also planned.
01Before
Make the ankles easy to reach
Wear loose, comfortable clothing and follow any instructions from your care team.
- Tell us about leg wounds or tender areas
- Mention prior leg bypass, stent, or angioplasty
- Bring relevant vascular records if available
02During
Rest while we measure both sides
You lie on your back while cuffs inflate and release around the arms and ankles.
- A small Doppler probe finds each pulse
- The cuffs feel like a blood-pressure check
- Each leg receives its own comparison
03After
Leave with no recovery period
There are no incisions, sedatives, or activity restrictions from a standard resting ABI.
- Return to your usual activities
- Your result is reviewed in context
- Additional testing is recommended only if useful
A standard resting ABI often takes about 10–20 minutes.Exercise, segmental-pressure, or toe-pressure testing may add time when those measurements are needed.
ABI Test Questions
Practical answers about the test, the result, and what may come next.
An ankle-brachial index, or ABI, compares systolic blood pressure at the ankle with systolic blood pressure at the arm. A lower pressure at the ankle can be a sign that narrowed leg arteries are reducing blood flow.
Current PAD guidelines categorize a resting ABI as abnormal at 0.90 or lower, borderline at 0.91 to 0.99, normal at 1.00 to 1.40, and noncompressible above 1.40. A specialist should interpret the number alongside symptoms, examination findings, and other testing.
You rest lying down while blood-pressure cuffs are placed on the arms and ankles. A handheld Doppler device detects blood flow as the cuffs inflate and release. The ankle and arm pressures are then compared for each leg.
A standard resting ABI often takes about 10 to 20 minutes, depending on the number of measurements needed. Additional exercise or toe-pressure testing takes longer.
Yes. If walking symptoms suggest PAD but a resting ABI is normal or borderline, an exercise ABI may be appropriate. If arteries are noncompressible, which is more common with diabetes or chronic kidney disease, toe-pressure testing or another study may be needed.
The test is noninvasive. The cuffs tighten briefly like a routine blood-pressure measurement, which can cause momentary pressure or mild discomfort, but there are no needles, incisions, or recovery period.
Coverage depends on symptoms, medical necessity, network status, authorization requirements, and plan rules. EVSLA can help check known benefits, but verification does not guarantee payment.
Request a Circulation Evaluation
An EVSLA specialist can review your symptoms, examine your circulation, and decide whether an ABI, vascular ultrasound, or another focused study is the right place to start.