What is ankle blood pressure measurement?
For the ABI, your physician measures your blood pressure in your ankle and in your arm. Your physician will compare the two numbers to determine your ABI.
Normally, the blood pressures in your ankle and arm should be about equal. But if your ankle pressure is half your arm pressure (or lower), your leg arteries are probably narrowed.
To perform the ABI, your physician will use an ordinary blood pressure cuff and an ultrasound device. The ABI helps your physician diagnosearterial disease in the legs , but it does not identify which arteries are blocked.