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The ankle-brachial pressure index (ABPI) or ankle-brachial index (ABI) is the ratio of the blood pressure at the ankle to the blood pressure in the upper arm (brachium). Compared to the arm, lower blood pressure in the leg suggests blocked arteries due to peripheral artery disease (PAD).
Ankle-brachial pressure index (ABPI) assesses peripheral vascular disease. It may however be unreliable in patients with calcified arteries in the calf (often diabetic patients) or those with extensive oedema, in which case toe pressure or Toe-brachial pressure index (TBPI) should be measured to aid in the diagnosis.
The ABI is a simple, non-invasive test that measures the ratio of systolic blood pressure in the ankle to the systolic blood pressure in the upper arm. This is based on the idea that if blood pressure readings in the ankle are lower than those in the arm, a blockage in the arteries that provide blood from the heart to the ankle is suspected. [55]
If your symptoms persist for a week or two, see your doctor, Gornik suggests. They’ll likely do a physical exam and an ankle-brachial index test, which measures blood pressure in your legs and arms.
A patient's ankle brachial pressure index (ABPI) must be >1.0 per leg to wear compression stockings, otherwise the stockings may obstruct the patient's arterial flow. The ABPI indicates how unobstructed a patient's leg and arm arteries are.
The ankle-brachial pressure index compares the systolic blood pressure of the ankle to the systolic blood pressure of the arm. A ratio that is outside of the range of 1-1.3 may indicate a disease of the vessels, such as peripheral arterial disease (the ankle-brachial index would be low). [1]
Ankle-brachial pressure index, a measure of the fall in blood pressure in the arteries supplying the legs; Association of the British Pharmaceutical Industry, the trade association for companies in the UK producing prescription medicines
Low blood pressure is hypotension. Blood pressures are also taken at other portions of the extremities. These pressures are called segmental blood pressures and are used to evaluate blockage or arterial occlusion in a limb (see Ankle brachial pressure index).