The ultrasonography (USG) Doppler scan uses high frequency sound waves to measure the amount of blood flow through the arteries and veins which supply blood to the particular limb (arm or leg). Any abnormality can be detected through this vascular (blood flow) study. Irregular blood circulation and blood clots can be detected and diagnosed.
Usually, irregular or reduced blood flow to the limb is caused by arterial blockage and blood clotting. Also, the USG Doppler scan can measure the blood pressure within the arteries and veins. Anyone suffering from deep vein thrombosis, superficial thrombophlebitis, arteriosclerosis and thromboangiitis obliterans is recommended this scan.
Normal test results indicate that you have no narrowing or blockages in your arteries. It also means that the blood pressure in your arteries is normal. Abnormal blood flow patterns, including narrowing or closing of the arteries, can indicate blockage in the arteries, which may be due to a buildup of cholesterol.