ABPI index (Ankle-Brachial Pressure Index)

“ABPI index” refers to the Ankle-Brachial Pressure Index, which is a medical test used to assess the blood circulation and potential blockages in the arteries of the legs and arms. The ABPI index is a valuable diagnostic tool that helps healthcare professionals evaluate the risk of peripheral arterial disease (PAD) and other circulatory issues. Here’s what you need to know about the ABPI index:

Ankle-Brachial Pressure Index (ABPI):

The ABPI is a non-invasive test that compares the blood pressure in the ankles to the blood pressure in the arms. It is primarily used to assess the presence and severity of peripheral arterial disease (PAD), which is a condition characterized by the narrowing or blockage of arteries that supply blood to the extremities, such as the legs.


  1. Preparation: The patient is asked to lie down and relax in a quiet room. They might be asked to wear comfortable clothing and remove shoes and socks for easier access to the ankles.
  2. Blood Pressure Measurements:
  • A blood pressure cuff (sphygmomanometer) is applied to the upper arm, and the systolic blood pressure is measured.
  • Blood pressure cuffs are also applied to the ankles (usually just above the ankle bone), and the systolic blood pressure is measured for each ankle.
  1. Calculation:
    The ABPI is calculated by dividing the highest systolic blood pressure at the ankle by the highest systolic blood pressure in the arm.


The ABPI index provides valuable information about the blood flow to the extremities and can help diagnose peripheral arterial disease (PAD). Here’s how to interpret the results:

  • Normal ABPI (0.9 – 1.3): A normal ABPI suggests that blood flow to the legs is adequate and there is no significant arterial blockage or narrowing.
  • Mild PAD (0.7 – 0.9): An ABPI in this range indicates mild peripheral arterial disease, suggesting some degree of narrowing or blockage in the arteries.
  • Moderate PAD (0.4 – 0.7): An ABPI in this range indicates moderate peripheral arterial disease with a more significant reduction in blood flow to the legs.
  • Severe PAD (below 0.4): An ABPI below 0.4 indicates severe peripheral arterial disease with a substantial reduction in blood flow, potentially leading to critical limb ischemia.


The ABPI index is a valuable tool for diagnosing and assessing the severity of peripheral arterial disease. It helps healthcare professionals make informed decisions about treatment options, lifestyle modifications, and interventions to improve blood circulation and prevent complications.

If you suspect any issues with your blood circulation or have symptoms such as leg pain, cramping, or wounds that won’t heal, it’s important to consult a healthcare professional who can perform tests like the ABPI to evaluate your condition and recommend appropriate management.

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