What is the primary purpose of calculating the Ankle-Brachial Index (ABI)?

The primary purpose of calculating the Ankle-Brachial Index (ABI) is to determine the presence of arterial disease. The ABI is a simple, non-invasive test that compares the blood pressure in a patient's ankle with the blood pressure in their arm. This comparison helps to assess the blood flow and identify any potential blockages or narrowing in the peripheral arteries, which can indicate conditions such as peripheral artery disease (PAD).

When the ABI value is lower than normal, it suggests that the arteries are narrowed or blocked, limiting blood flow to the limbs. This can help clinicians diagnose and manage arterial diseases, guiding further evaluation or treatment if necessary. The use of ABI is particularly important in populations at risk for vascular disease, as early detection can significantly impact patient outcomes.

Overall, the ABI serves a crucial role in vascular assessment, making it an essential tool in the field of phlebology and cardiovascular health.