How do you calculate ankle index?

Health care providers calculate ABI by dividing the blood pressure in an artery of the ankle by the blood pressure in an artery of the arm. The result is the ABI. If this ratio is less than 0.9, it may mean that a person has peripheral artery disease (PAD) in the blood vessels in his or her legs.

What is normal ABI index?

Normal. A normal resting ankle-brachial index is 1.0 to 1.4. This means that your blood pressure at your ankle is the same or greater than the pressure at your arm, and suggests that you do not have significant narrowing or blockage of blood flow.

What is an ABI test done for?

To find out your ankle-brachial index, a technician measures the blood pressure in your ankle and your arm. The ankle-brachial index can help your doctor check for peripheral artery disease (PAD). The ankle-brachial index test is a quick, noninvasive way to check for peripheral artery disease (PAD).

What does a high ankle-brachial index mean?

In humans, a high ankle brachial index (ABI) indicates stiff peripheral arteries, and is associated with cardiovascular disease (CVD) events. Whether high ABI is associated with LV mass in humans, and whether this may reflect consequences of arterial stiffness, atherosclerosis, or both is unknown.

How do you read ankle-brachial index?

What do the ankle-brachial index (ABI) test results mean?

An ABI ratio between 1.0 and 1.4 is normal.
An ABI ratio between 0.9 and 1.0 is borderline.
An ABI ratio of 0.9 or less means you have PAD.
An ABI ratio between 0.4 and 0.7 means you have moderate PAD.
An ABI ratio less than 0.4 means you have severe PAD.

What should my ankle blood pressure be?

The normal range for the ankle-brachial index is between 0.90 and 1.30. An index under 0.90 means that blood is having a hard time getting to the legs and feet: 0.41 to 0.90 indicates mild to moderate peripheral artery disease; 0.40 and lower indicates severe disease.

How often should Abi be done?

The American Diabetes Association recommends ABI screening in all patients with diabetes who are older than 50 years; if results are normal, screening should be repeated every five years.

Why does a doctor squeeze your ankles?

Doctors use this test to check for peripheral artery disease (PAD). When you have this condition, it means you have blockages in the arteries of your arms and legs. This slows your blood flow, so your limbs don’t get all the oxygen they need. If you have PAD, you’re more likely to have a stroke or heart attack.

What should blood pressure in legs be?

Leg blood pressure should be about the same as arm blood pressure. Comparing the two systolic pressures is called the ankle-brachial index. (“Brachial” is the Latin word for “arm.”) The normal index is 0.9 to 1.3.

What is the ankle brachial index and how is it computed?

The Ankle Brachial Index (ABI) is the systolic pressure at the ankle, divided by the systolic pressure at the arm. It has been shown to be a specific and sensitive metric for the diagnosis of Peripheral Arterial Disease (PAD).

What does ankle brachial index stand for?

An ankle-brachial pressure index (ABPI) or ankle-brachial index (ABI) is the ratio of the systolic (upper) blood pressures (BP) of the ankle to the upper arm (brachium). Ankle BP is indicative of arterial disease. Lower ankle BP in the leg suggests blocked blood vessels due to peripheral artery disease (PAD) or atherosclerosis.

What is an ankle brachial index exam?