With Saphenous Vein Ablation, ultrasound aids in guiding this minimally-invasive outpatient procedure. Once a local anesthetic is applied to the area to be treated, the doctor inserts a fine catheter into the vein through a tiny incision and moves it through the great saphenous vein located in your thigh. Next, energy from either laser or radiofrequency is used to heat the vein, permanently sealing it closed. By closing off the affected great saphenous vein, the twisted and ropey veins close to the skin will shrink and disappear from sight. After the procedure, healthier veins resume the regular task of carrying blood from the leg back up to the heart.