Systolic pressures measured at the ankle should be equal to or greater than the pressures measured at the arm. The ankle-arm pressure index (API) is normally 1.0 or greater. The API declines as levels of disease increase.
Before The Procedure There are no special preparations for this test. You will be taken to the Vascular lab in a wheelchair or stretcher. If a family member would like to go with you, they must be prepared to walk a great distance quickly. During The Procedure If you go by wheelchair, you will be asked to lie on a bed in an exam room for the test. There will be a short wait while the technician reviews your chart. Blood pressures will be taken on your arms and ankles. The changes in pressures will help your physician locate any suspected blockages. The technician will chart out the pressures on a map of the vascular system, and place it in your chart for your physician to review.
After The Procedure After a brief wait, you will be taken back to your room by wheelchair or stretcher. Your physician will explain the results of the test after he/she reviews the charted pressures.