Arterial ultrasound uses two techniques to evaluate the blood pressure and blood flow in the arteries in your legs. These techniques are blood pressure measurement using cuffs similar to those used for arm measurements of pressure, and ultrasound (high frequency sound waves). Arterial ultrasound is performed to detect obstructions in the leg arteries. These obstructions may be causing symptoms, such as leg pain when walking or doing other forms of exercise. Total time for the test is an hour.