ABSTRACT
What is important the most is the concentration inside the vein, not in the syringe.
INTRODUCTION
This famous axiom from Raymond Tournay (1), the French father of sclerotherapy, continues to be valid even a fifty years after its first enunciation, and the recent advance of foam sclerotherapy, puts these words in a new light. With the sclerosing foam (SF), it is possible for the first time, to achieve full control on drug concentration inside the vein and on the time of contact between the sclerosing agent and the endothelium (2).
