What does ABI testing help to distinguish?

ABI testing, or Ankle-Brachial Index testing, is a diagnostic tool that compares the blood pressure in the ankle with the blood pressure in the arm. This ratio helps to assess and distinguish between arterial issues, particularly to identify peripheral artery disease (PAD).

By measuring the pressures at these two sites, ABI testing helps determine whether blood flow is adequate through the arteries. A low ABI value indicates poor arterial circulation, which is critical in diagnosing conditions such as atherosclerosis. In contrast, conditions like venous issues do not typically affect ABI readings in the same manner, making it clear that the test focuses specifically on arterial health.

This differentiating ability is crucial in clinical practice as it directs appropriate treatment and management strategies for patients presenting with leg pain or other symptoms suggestive of vascular diseases.