Duplex ultrasound allows physicians to measure the velocity of blood flow to many parts of the body. It can also tell the width of a blood vessel and reveal any blockages. Duplex ultrasound combines traditional ultrasound with Doppler ultrasound and is a less invasive option than arteriography and venography.
Duplex ultrasound is used to detect the presence and severity of numerous conditions, including:
- Thrombosis (blood clots);
- Blockages from atherosclerosis (hardening of the arteries);
- Thrombophlebitis (an inflammation of the blood vessels);
- Trauma to an artery or vein;
- Raynaud's phenomenon (a spasm of small blood vessels in the fingers); and
- Increases in the thickness of the blood vessel lining.