The endovenous technique involves puncturing the affected vein (usually the GSV), with an 16 or 18 guage needle under ultrasound guidance. A guide wire is introduced through the needle up to the sapheno-femoral junction (SFJ). A catheter is introduced over the guide wire till a point just before the SFJ. The guide wire is removed and replaced with a 600 micron laser fiber and the fiber tip is positioned just before the SFJ, just outside the catheter. The fiber and catheter are removed together 2-3 mm at a time, while firing the laser at each stop. The laser causes throbolysis, and a destruction of the endothelium of the vein wall. Finally, the laser fiber and catheter are removed from the original puncture site.

Reticular Veins may be treated by making multiple punctures in the vein using a 21 guage needle, and introducing a 200 micron fiber through the needle into or just adjacent to the vein. The laser is fired, thus causing destruction of the vein.

Spider Veins and Telangectasia may be treated by treating the veins with a high power density spot using a special handpiece, all along the length of the veins  This treatment is done percutaneously.