Doppler Ultrasound Manufacturers

A Doppler ultrasound is a noninvasive test that can be used to evaluate blood flow and pressure by bouncing high-frequency sound waves (ultrasound) off red blood cells. The Doppler effect is a change in the frequency of sound waves reflected by a moving object. A Doppler ultrasound can estimate how fast blood flows by measuring the rate of change in its pitch (frequency). This test may be done as an alternative to more invasive procedures such as arteriography and venography, which involve injecting dye into the blood vessel to enhance X-ray images. A Doppler ultrasound may help diagnose many conditions, including: blood clots, incompetent valves in leg veins, which cause fluid to accumulate (venous insufficiency), heart valve defects & congenital heart disease, a blocked artery (arterial occlusion) and narrowing (stenosis) of an artery. This test also helps doctor to evaluate an injury to the arteries or to monitor arterial reconstruction and bypass grafts.