Swollen feet and legs, referred to medically as edema, occur when fluid is retained in the spaces between body cells. Edema typically affects the feet, ankles and lower legs, but can also impact any area of the body, causing systemic symptoms. Causes:
Ankleâbrachial pressure index - Interpretation of results. 1  In a normal subject the pressure at the ankle is slightly higher than at the elbow (there is reflection of the pulse pressure from the vascular bed of the feet, whereas at the elbow the artery continues on some distance to the wrist).
ABI Diseased Report Example. The ankle-arm pressure index (also known as the Ankle / Brachial Index or ABI) compares the systolic blood pressure of the ankle to that of the arm (brachial). These measurements are useful in the assessment, follow-up and treatment of patients with peripheral vascular disease (PVD).