Figure 1: Measurement of the ankle-brachial index (ABI).
Systolic blood
pressure is measured by Doppler ultrasonography in each arm and in
the dorsalis pedis (DP) or posterior tibial (PT) arteries in each
ankle. The higher of the two brachial arm pressures is selected if
the difference is  10mm
Hg, otherwise, take the average of both left & right brachial pressures
and use that number in determing the ABI for both the right and left
sides. The ankle pressure is taken as the higher of the two pressures
in each ankle. The right and left ankle-brachial index values are
determined by dividing the higher ankle pressure in each leg by the
average/highest arm pressure. |
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