What are the advantages of maximum venous outflow (MVO) testing to assess venous insufficiency?

Updated: Oct 22, 2018
  • Author: Robert Weiss, MD; Chief Editor: William D James, MD  more...
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A major advantage of MVO testing is that as a functional rather than anatomic test, it is sensitive to significant intrinsic or extrinsic venous obstruction due to any cause at almost any level. It can be used to detect obstructing thrombus in the calf veins, the iliac veins, and the vena cava, areas where ultrasonography and venography are insensitive. It can also be used to detect venous obstruction due to extravascular hematomas, tumors, and other extrinsic disease processes.

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