Certified Diabetes Educator Practice Exam 2026 - Free Practice Questions and Study Resource.

Ankle-brachial index (ABI) testing is a non-invasive method used to assess peripheral artery disease (PAD). In a normal ABI test, the blood pressure readings at the ankle should be comparable to those at the arm. This is because in a healthy vascular system, the blood pressure in the ankle should be similar to the blood pressure in the arm due to the continuous flow of blood through the arteries without substantial obstruction.

A similar pressure reading indicates adequate blood flow to the lower extremities, which is crucial for proper perfusion and overall limb health. If the pressures are significantly different, it may suggest the presence of vascular diseases, which can lead to conditions such as PAD. Therefore, when considering a normal ABI, it is essential that both pressures – at the ankle and the arm – are approximately the same. This understanding is vital for establishing a baseline and evaluating the presence of any vascular abnormalities in diabetic patients or others at risk.