In recent years, the incidence of cerebrovascular diseases has gradually increased, becoming a major killer of human health. There are many types of cerebrovascular diseases, such as smog disease, carotid artery stenosis, vertebral artery stenosis, cerebral aneurysm, cerebral vascular malformation, cerebral arteriovenous fistulae and so on, all of which may cause stroke, or cerebral infarction, or cerebral hemorrhage, which is very dangerous, and in serious cases, it may even be directly life-threatening. Some patients ask about the cause of moderate stenosis of the terminal segment of the right internal carotid artery, which depends on the situation. Sometimes, the right internal carotid artery terminal segment stenosis moderate may be caused by atherosclerosis, blood lipid deposition, plaque formation, blockage of blood vessels, resulting in narrowing of the lumen, the specific causes can be related to hypertension, high blood fat, high blood sugar and other underlying diseases, smoking, drinking can be exacerbated; in addition, the right internal carotid artery terminal segment stenosis moderate may also be caused by smog disease, because smoke disease is the terminal internal carotid artery, the middle cerebral artery and other major blood vessels chronic progressive stenosis. Smoke disease is the end of the internal carotid artery, the middle cerebral artery and other major blood vessels chronic progressive stenosis or occlusion, secondary to the skull base of the abnormal vascular network of a disease, the specific cause of smoky disease is still not very clear, most scholars believe that with the congenital factors related to the acquired atherosclerosis, metabolic immune response, and so on. Although the cause of smoky disease is still not very clear, but for the treatment of smoky disease, there is a consensus in the medical community, generally believe that conservative medical treatment of smoky disease is of little significance, and need to be treated by intracranial and extracranial blood line reconstruction surgery. Surgery for smoky skin disease has traditionally been performed by direct vascular bypass or patch surgery, but these two simple surgical procedures have certain limitations, such as the limited scope of improvement of the blood supply in direct vascular bypass surgery, and the fact that patch surgery requires a longer period of time to take effect, during which there is still a risk of stroke. So these two simple surgical approaches are not ideal.