Duplex ultrasound

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.