How is an ABI test performed?

The ABI is performed by measuring the systolic blood pressure from both brachial arteries and from both the dorsalis pedis and posterior tibial arteries after the patient has been at rest in the supine position for 10 minutes. The systolic pressures are recorded with a handheld 5- or 10-mHz Doppler instrument.

What does a high brachial index mean?

In humans, a high ankle brachial index (ABI) indicates stiff peripheral arteries, and is associated with cardiovascular disease (CVD) events.

What is ABI used to diagnose?

An ankle-brachial index (ABI) test is a simple way for your doctor to check how well your blood is flowing in your legs. 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.

How do you prepare for a ABI test?

There is very little you need to do to prepare for an ABI test. You can follow a normal diet on the day of the test. You shouldn’t need to stop taking any medicines before the procedure. You may want to wear loose, comfortable clothes.

What is the normal blood pressure of the brachial artery?

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 to complete brachial ankle index?

Divide the systolic blood pressure of the ankle by the systolic blood pressure of the arm. You will calculate the ABI for each leg individually. Use the highest value from your readings of the left ankle arteries and divide it by the value of the brachial artery.

What is the normal toe brachial index?

– Normal: 1 to 1.29. – Borderline: 0.91 to 0.99 – Mild PAOD: 0.71 to 0.90 – Medium severe PAOD: 0.41 to 0.7 – Severe PAOD: <0.4 Diabetics present an exception to these typical readings. – Cool sensation in the feet or legs – Colour changes in the skin and loss of hair – Persistent sores in the feet and toes that don’t heal

How to lower extremity arterial duplex exam?

– Narrowing of your vessels that may be causing leg pain when walking – Resting leg pain – Foot, ankle, heel or toe ulcers – Skin discoloration