Eufoton Semiconductor Laser Minimally Invasive Treatment of Lower Extremity Varicose Veins – Laser Endovenous Closure Superficial varicose veins of the lower extremities are a common surgical complication, and surgical treatment is the most effective treatment for varicose veins of the lower extremities with definite efficacy. Traditional surgical procedures include: 1) high ligation of the saphenous or small saphenous vein; 2) stripping of the main trunk of the saphenous or small saphenous vein and varicose veins; 3) ligation of incompetent traffic veins, especially important for those with hyperpigmentation or ulcers. With the development of technology, new minimally invasive treatments such as laser and radiofrequency have emerged, but the aim of all these treatments is to remove or occlude the diseased vessels. The efficacy of these new methods is relatively certain, and they are complementary to the traditional methods. The actual application of the treatment method needs to be selected according to the specific situation of the patient and the technical development of the hospital. The latest introduction of the international leading Eufoton semiconductor laser for the treatment of varicose veins in the lower extremities in our department. 1.The principle of laser treatment for varicose veins in the lower extremities The mechanism of laser treatment is achieved by indirect thermal damage to the inner walls of the veins. The laser beam enters the bloodstream and its penetration depth is about 0.3 mm. After leaving the top of the fiber, the laser beam remains focused at a very small point and the formation of vapor bubbles at the top of the laser can be observed, and the volume of the vapor bubbles is directly related to the laser energy. The vapor bubbles are generated by boiling blood in the vein lumen during EVLT, causing extensive thermal damage to the surface of the vein lining. Extensive thermal damage to the endothelium and intima can also induce thrombosis throughout the vein and eventually lead to venous occlusion. 2.Advantages of laser treatment for varicose veins of lower limbs Safe, reliable, exact effect, minimally invasive, rapid, less scarring; can keep normal activities after surgery, less complications; improve leg signs after surgery, beautiful appearance; easy operation, short operation time, fast recovery after surgery. 3.The indications of laser treatment for varicose veins of lower limbs Primary varicose veins of lower limbs with obvious symptoms; varicose veins of lower limbs without obvious symptoms, but patients have cosmetic requirements; allergic to sclerosing agent; spider-like dilation of capillaries.