[The role of support in the prevention of venous thromboses of the lower limbs].

Support and exercise has long been accepted as a mechanical method of preventing venous stasis. In recent years the role of the venous endothelium in the pathogenesis of thrombosis has been emphasised. The trouble occurs at the level of the microcirculation. Given the delicate balance at that level, it is easy to appreciate how various antagonistic systems (serotonin, quinine, etc.) can be easily distorted. Elastic support helps prevent these endothelial changes.