1. Refinements in the ultrasonic detection of popliteal vein reflux
Clifford T. Araki, PhD, Thomas L. Back, MS, RVT, Frank T. Padberg, MD, Peter N. Thompson, MD, Walter N. Duran, PhD, Robert W. Hobson, MD 
Journal of Vascular Surgery 
Volume 18, Issue 5, Pages (November 1993)
DOI: / (93)90326-H
Copyright © 1993 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

2. Fig. 1
Effect of patient positioning on reflux velocity (A) and reflux duration (B). Graphs represent effect on individual limbs with each point representing mean of four measurements. Difference between standing and supine position are represented by dotted lines.
Journal of Vascular Surgery  , DOI: ( / (93)90326-H)
Copyright © 1993 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

3. Fig. 2
Effect of proximal compression and the release of distal compression on reflux velocity (A) and reflux duration (B). Graphs represent effect on individual limbs with each point representing mean of four measurements. Difference between proximal and distal compressions are represented by dotted lines.
Journal of Vascular Surgery  , DOI: ( / (93)90326-H)
Copyright © 1993 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions