Abstract
The success of treating varicose veins depends on the completeness with which the sites of valvular incompetency are interrupted. The pattern of valvular insufficiency and varicose veins varies greatly from patient to patient and must be assessed thoroughly before operation. To identify and localize valvular incompetency, the author recommends use of the retrograde leg-milking test, which he describes as a simple procedure that may be applied to all patients.