LSO Medical offers a large range of devices for varicose veins treatment: - the new Endotherme, diode laser 1470nm, with Radial emitting fiber - the Endotherme, diode laser 980nm, with Distal fiber The principle of Endotherme is based on the thermal effect of the laser, which consists in 4 steps: - Conversion of light into heat - Transfer of the heat to the vessel wall - Thermochemical effect on the tissue components of the vessel wall - Destruction of the vessel wall.