ELVA is a technique that uses laser energy to treat varicose veins. A 980 nm diode laser is used to deliver the laser energy via a small laser fibre. The procedure, termed the Endovenous Laser Procedure (EVLP, ELVeS), or Laser ablation (EVLA) is performed under local anaesthesia. A tiny laser fibre is first inserted into the diseased vein through a tiny needle (venipuncture) in the skin similar to blood sampling in a laboratory. After he Laser has been positioned energy is then delivered through the fibre, which causes the vein to close as the fibre is gradually removed.