A Doppler ultrasound is a noninvasive imaging test that uses sound waves to measure the blood flow through blood vessels. It can be used to examine blood flow in various parts of the body, including the heart, neck, arms, and legs. The test works by bouncing sound waves off red blood cells flowing through the blood vessels, and the ultrasound device measures the echoes that bounce back from the cells. This test can help detect conditions such as narrowed arteries, blood clots, and heart valve diseases
. It is a quick and painless way to check for problems with blood flow, such as deep vein thrombosis, and can also be used to check on blood flow to a baby during pregnancy
