Carotid endarterectomy is actually a very mature procedure with a history of almost 60 years, and the conclusions and reliability of the procedure have basically reached a consensus. As for what people can not do, there are several situations: 1, the general condition is too poor, coagulation disorders and other patients who are not suitable for general anesthesia should not be carotid endarterectomy. Nowadays, some doctors actually use local anesthesia to do it, but most of them still have general anesthesia; 2, generally the location of the stenosis is too high, the carotid endarterectomy may not be easy to operate, and the interventional surgery will be more advantageous. But the words are not absolute, sometimes although the stenosis location is very high but must be operated on people also have to do. Older people who cannot be intervened because the catheter does not go up, but must undergo carotid endarterectomy can take a special approach to solve the problem, such as grinding off or removing a portion of the mandibular angle, or using a variety of other methods of surgery. In general, however, this procedure is becoming less and less common, as stenting is much simpler and is only used in individual patients.