What is the role of ultrasonography in the diagnosis of venous insufficiency?

Updated: Sep 25, 2020
  • Author: Robert Weiss, MD; Chief Editor: William D James, MD  more...
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Duplex ultrasonography is the study of choice for the evaluation of venous insufficiency syndromes. Color-flow duplex imaging uses the Doppler information to color code the 2-dimensional sonogram. On the image, red indicates flow in one direction (relative to the transducer), and blue indicates flow in the other direction. [19] On newer machines, the shade of the color may reflect the flow velocity (in the Doppler mode) or the flow volume (in the power Doppler mode).

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