
Proffesional diode laser- CHERYLAS for varicose vein (EVLA) The underlying goal for all thermal ablation procedures is to deliver sufficient thermal energy to the wall of an incompetent vein segment to produce irreversible occlusion, fibrosis, and ultimately disappearance of the vein. The mechanism of vein wall injury after EVLA is controversial. It has been postulated to be mediated both by direct effect and indirectly via laser-induced steam generated by the heating of smal l amounts of blood within the vein. Adequately damaging the vein wall with thermal energy is imperative to obtain effective ablation. Some heating may occur by direct absorption of photon energy (radiation) by the vein wall, as well as by convection from steam bubbles and conduction from heated blood. However, these later mechanisms are unlikely to account for most of the impact on the vein. Diode lasers are most commonly used for EVLA. Laser generators exist with multiple different wavelengths, including lower...