The brain is the life center and the most important organ of the human body. And according to the latest statistics from the Ministry of Health, stroke is the third leading cause of death in China, and the trend is increasing year by year. Ischemic stroke accounts for about 80% of all strokes, mainly due to atherosclerosis and thrombosis of the arteries supplying blood to the brain, resulting in narrowing or even occlusion of the lumen, leading to focal acute cerebral blood supply deficiency and the onset of the disease; most of the patients with ischemic stroke have cerebral infarcts, and about 50% of these patients suffer from carotid arteriosclerosis of extracranial segment. The carotid arteries are the main blood vessels leading from the heart to the brain, and about 80% of the brain’s blood is supplied by the carotid arteries on both sides. When the internal carotid artery atherosclerosis stenosis more than 50%, the blood supply to the brain will be seriously affected, the blood flow slows down, stagnation, the formation of thrombus, plaque can also be dislodged to cause cerebral infarction. Therefore, it is said that cerebral infarction occurs in the brain, and the root of the problem is in the neck. Atherosclerosis is a vascular disease that occurs as people age, hypertension, hyperlipidemia, smoking is the most important three risk factors for atherosclerosis, other factors such as obesity, diabetes mellitus, lack of exercise, anxiety and tension, old age, family history of disease and so on have a relationship with. The blood vessel wall without plaque is smooth and flat, while the blood vessel attached to the hardened plaque is like a river with silt deposits, the lumen narrows, the downstream blood supply is insufficient, and the silt will also be washed downstream to the distal end of the distal end of the blockage. At the same time, the surface of the plaque is a layer of envelope, the envelope is very thin, the envelope contains lipids, agglutinated platelets, etc., like a dumpling with thin skin and large stuffing, in the emotional excitement, strenuous exercise, alcoholism, cold stimulation or sudden rise in blood pressure, blood impact plaque or vascular spasm, the envelope is very easy to rupture, resulting in atherosclerotic plaques, this “ticking time bomb! “was detonated, local thrombosis in a moment to block the blood vessels, blocking the cerebral blood vessels will appear cerebral infarction. For a long time, people’s attention to cerebrovascular diseases has been focused on the treatment of stroke, but carotid endarterectomy is to shift the focus of attention to the prevention of stroke before it occurs. Carotid endarterectomy is currently the “gold standard” surgery for the treatment of carotid atherosclerotic stenosis, which involves the complete removal of blood clots, atherosclerotic plaque, and necrotic thickened arterial endothelium from the stenosis site to restore the stenosis to a normal caliber. In layman’s terms, this means that if the silt in the upstream river is cleaned up, there will be no shortage of water supply downstream. This procedure has been widely carried out abroad and has long been the preferred method of preventing and treating cerebral infarction, but in China, this procedure has not yet been widely carried out, and only a small number of hospitals have reported cases, so a large number of patients with pre-stroke have not been detected in time and given effective interventions.