Blocked blood vessels are a very serious problem, such as a blocked carotid artery. It is important to know that the carotid artery is the main vascular channel connecting the brain and the heart, and if there is a blockage in the carotid artery, it will not be able to supply blood flow to the brain properly and the consequences will be unthinkable. Many people today unfortunately suffer from carotid artery blockage, a cerebrovascular disease that can be dangerous, and active and effective treatment is the key. The more serious cases of carotid artery blockage need to be treated by surgical methods. This is a question that many patients ask because they are very ignorant and confused about the treatment. At present, there are many hospitals that treat such diseases as carotid artery blockage, and different hospitals use different surgical treatment options. There are stent interventions, but it has been proven that there are many problems with stent interventions, and a more advanced and effective technology is needed for treatment. For carotid artery stenosis, different levels of severity are treated by different surgical procedures. At present, it is possible to carry out carotid endarterectomy to treat moderate to severe carotid stenosis, and to carry out intracranial and extracranial vascular bypass surgery to treat carotid occlusion and effectively prevent cerebral infarction, which can achieve very good therapeutic results and become the ideal method for treating carotid stenosis and occlusion at present. Unlike stent intervention, the principle of intracranial and extracranial vascular bypass surgery is to directly suture the intracranial and extracranial vessels and connect them. This allows blood from the extracranial vessels to flow successfully into the brain, improving blood circulation to the ischemic area and thus helping to restore brain function. However, it is important to note that patients with the following conditions cannot undergo intracranial and extracranial vascular bypass surgery: 1) patients with severe long-term cerebral neurological dysfunction after stroke; 2) patients with poor donor vessel visualization after cerebral angiography; 3) patients with severe systemic diseases, such as heart failure, kidney failure, pulmonary insufficiency and diabetic patients.