The carotid artery is a major artery in the body that connects directly to the heart and head and provides blood to the brain and head and facial organs. Therefore, if a lesion occurs in the carotid artery, it will affect the blood supply to the brain, which is very dangerous. For example, carotid stenosis is a relatively common cerebrovascular disease that often occurs in the middle-aged and elderly population. In these people, due to the aging of blood vessels, atherosclerosis, the blood becomes sticky, and the deposition of lipid waste in the blood adheres to the inner wall of the carotid artery, causing the carotid artery lining to gradually proliferate and deteriorate, and over time, plaque is formed, blocking the lumen and causing carotid artery stenosis. Some patients ask about the treatment of carotid artery blockage. In fact, the treatment varies according to the different levels of blockage in the carotid artery. In general, if the blockage of carotid artery is less than 50%, it is considered as mild carotid stenosis, and it is recommended to treat it conservatively by internal medicine, adhere to strict standardized medication, maintain good living and eating habits, and review it regularly; while if it is moderate to severe carotid stenosis with blockage of more than 50%, it needs to be treated surgically depending on the situation. Carotid endarterectomy is an internationally recognized standard surgical procedure for the treatment of moderate to severe carotid stenosis to prevent cerebral infarction and is widely used in Western, European and American countries, but this procedure is not very popular in China, and only a few large medical institutions with advanced technology are performing it. Carotid endarterectomy is performed under a microscope, which ensures the safety of the procedure. During the procedure, the carotid artery wall is incised and the diseased carotid intimal plaque is peeled off and removed, so that the carotid artery wall is smooth, the carotid lumen is restored to its original size, and blood flow is restored.