An ABI is a non-invasive procedure that will typically be performed on the arm and ankle using a regular blood pressure cuff and ultrasound equipment. In patients with normal circulation, the blood pressure measurement taken on the arm is equal to the blood pressure measurement taken on the ankle. If an ABI shows that the blood pressure in a patient’s ankle is lower than the blood pressure in their arm, it is possible that the arteries in the legs have narrowed. It is important to note that an ABI may determine if arterial disease is present, but it does not detect which arteries are affected or the extent of the disease.
If an ABI indicates that your leg arteries have narrowed, further tests may be required to determine the extent of arterial damage.