No special preparation is necessary. However you must let your technologist or physician know if you are allergic to anesthetics, have a pacemaker, internal defibrillator or other implanted medical device. You will be asked to wear protective glasses while lasers are in use. To minimize the risk of bruising and bleeding, patients who take blood thinners may be asked to stop their medication prior to the procedure. The leg being treated will be sterilized and covered with a surgical drape and a local anesthetic will be administered to the site where the incision will be made, generally immediately above or below the knee.