What does an Ankle Brachial Index (ABI) of 0.9-1.0 indicate?

An Ankle Brachial Index (ABI) score of 0.9-1.0 suggests normal blood flow to the limbs, indicating no significant arterial obstruction. The ABI is a quick and non-invasive test used to assess the presence of peripheral artery disease (PAD). An ABI of 1.0 is often considered indicative of healthy arterial function, while a low value below 0.9 typically represents varying degrees of arterial obstruction or blockage, which can be classified as mild to severe disease. Therefore, the range of 0.9 to 1.0 demonstrates that the patient does not show signs of critical ischemia or major restrictions in blood flow, affirming that the vascular condition is stable in that range.