Which measurement method describes the technique used to determine the ankle-brachial index?

The ankle-brachial index (ABI) is a fundamental measurement used to assess peripheral arterial disease (PAD) and is calculated by comparing the systolic blood pressure in the lower leg (ankle) to that in the upper arm (brachial). The appropriate method for determining the ABI involves taking the systolic blood pressure reading from the ankle and dividing it by the systolic blood pressure reading from the arm. This ratio effectively shows how well blood is flowing to the legs compared to the arms and helps identify any potential blockages in the arteries.

Thus, the correct measurement method encompasses dividing the lower extremity systolic pressure by the upper extremity systolic pressure. By using systolic blood pressures, the calculation accurately reflects the pressure differences that may indicate vascular health.