The human body has a lot of vascular channels, including the carotid artery is an important vascular channel, its role is very large, most of the blood of the brain is through the carotid artery to transport, but the carotid artery blood vessels are also very easy to be attacked by some diseases, which will have a great impact on the blood supply to the brain, the whole body health will also be threatened. Carotid artery stenosis is now more frequent, especially some middle-aged and elderly people are prone to carotid artery stenosis, and the cause of the disease is mainly atherosclerotic plaques caused by the formation of plaques will lead to narrowing of the lumen of the vessel, thus causing a certain impact on the blood supply to the brain, the patient’s body will also experience some discomfort symptoms. Of course, the carotid artery stenosis is also divided into light and heavy, some patients are only slight stenosis, this can be taken to conservative drug treatment, to control the plaque growth of the purpose. However, if the carotid artery stenosis is very serious, it is not possible to rely on medication alone, and it must be treated through surgery in a timely manner in order to reduce the incidence of cerebral infarction, stroke and other problems. What if one side of the carotid artery is completely occluded and the other side is severely blocked? In the clinic have encountered such patients, it is clear that such a situation is very serious, especially patients have one side of the carotid artery has been completely occluded, which means that the vascular channel has been blocked, and the other side is also in the same time in the severe blockage, the blood supply to the brain is likely to be unable to meet, if not treated in a timely manner will be life-threatening.