What is the role of air plethysmography in the diagnosis of venous insufficiency?

Updated: Oct 22, 2018
  • Author: Robert Weiss, MD; Chief Editor: William D James, MD  more...
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Air plethysmography (APG) is a noninvasive test that has the ability to measure some pathophysiologic mechanisms of CVI, which includes reflux, obstruction, and muscle pump dysfunction. This test facilitates evaluation of venous filling through the venous filling index. It may be useful when venous duplex ultrasound does not provide conclusive information. [21]

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