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Venous reflux after manual augmentation. (A) Non-pathologic brisk reflux after the augmentation maneuver (reflux time < 1.0 second in the femoral vein). (B) Pathologic reflux after the augmentation maneuver (reflux time > 0.5 second in the great saphenous vein). CFV, common femoral vein; GSV, great saphenous vein.
