What Is the Ankle Brachial Pressure Index?

The ankle brachial index (ABI) is the most commonly used and easiest test method in vascular surgery. The ankle arterial pressure and brachial artery are obtained by measuring the systolic pressure of the posterior tibial artery or anterior tibial artery and the brachial artery. The ratio between the pressures.

Foreign name: ankle brachial index

Name: Ankle brachial index
category: Other as

Normal ankle brachial index

The range of ankle-brachial index of normal people at rest is 0.9-1.3.

Clinical significance of ankle brachial index

Abnormal results: less than 0.8 indicates a moderate disease, and less than 0.5 indicates a severe disease. The ankle-brachial index of patients with intermittent claudication is mostly between 0.35-0.9, and the ankle-brachial index of patients with resting pain is often lower than 0.4. It is generally believed that such patients may face the risk of amputation if they are not actively treated. When the ankle-brachial index is greater than 1.3, it indicates that vascular wall calcification and vascular contraction function are lost, and it also reflects severe peripheral vascular disease. People to be checked: People who have intermittent nagging behavior.

ABI is mainly used to detect peripheral arterial disease of the lower limbs in the early stage. The sensitivity and specificity of ABI0.9 for the diagnosis of peripheral arterial diseases of the lower limbs are 95% and 99%, respectively. At the same time, a decrease in ABI is an independent risk factor for cardiovascular and cerebrovascular events and a strong predictor of total mortality and cardiovascular mortality. Therefore, ABI can be used not only for the diagnosis of peripheral arterial diseases of the lower limbs, but also for risk stratification such as atherosclerotic diseases, which has important clinical application value.

Ankle brachial index considerations

Inappropriate: None. Contraindications before examination: No special contraindications. Requirement during inspection: Examine and relax, face actively, and actively cooperate with inspection.

Ankle brachial index examination process

The patient was supine, with 12 cm × 40 cm air sleeves placed on both ankles and upper arms, and a Doppler stethoscope was used to help measure the dorsal or anterior tibial artery, posterior tibial artery and brachial artery. Ankle brachial index. Normal ABI 0.97. 0.97-0.9 is the critical value.