False elevation of ABPI is seen in:

Ref. Sabiston Textbook of Surgery. Pg. 497   The ankle-brachial pressure index (ABPI) is the ratio of systolic pressure at the ankle to that in the arm . The higher of the pressures in the dorsalis pedis and the posterior tibial arteries serves as the numerator ,with the higher systolic pressures between the brachialis serving as the denominator . Resting ABPI is normally about 1 , <0.9 indicated some degree of arterial obstruction <0.3 suggests imminent necrosis # Artefacts are due especially due to calcified arteries, which are often incompressible and lead to a falsely high pressure or ABPI result ,especially in diabetics.