The presence of an abnormal passage between an artery and a vein is called an arteriovenous fistula. Arteriovenous fistula has congenital and acquired secondary two types, congenital arteriovenous fistula is due to the embryonic mesoderm in the process of development and evolution, the residual abnormal channel between the arteries and veins and caused, characterized by arteriovenous fistula fistula fistula is small and extensive, the lesion involved in the tissue, often with the skin, muscle, bone and other vascular tumors at the same time; secondary arteriovenous fistula is mainly caused by trauma, there are all kinds of trauma, stabbing wound, The secondary arteriovenous fistula is mainly caused by trauma, including various traumas, stab wounds, puncture wounds of fracture and so on. Injured parts of the arteriovenous rupture, the first local hematoma, and then under the impact of arterial pressure, the blood flow through the hematoma cavity and venous rupture and cause a short circuit between the arteriovenous, hematoma mechanization, the formation of arteriovenous fistula abnormal channel. Common symptoms are localized swelling, hematoma, limb numbness, pain, weakness, fluctuating mass, localized vascular murmur; patients with heart failure have chest tightness, palpitations, shortness of breath and so on. For congenital arteriovenous fistula that does not affect the limb, generally do not do special treatment; and cause ischemia of the limb, severe hypoxia, obvious varicose veins, should be active surgical treatment.