In the case of cerebrovascular disease, many patients may appear to be healthy but may actually have serious cerebrovascular problems, and once they develop, the death or disability rate is usually high, which is often difficult for unprepared patients’ families to accept. The success rate of surgery is one of the main concerns of many patients’ families, but it is also one of the most difficult questions for surgeons to answer. The answer to this question should be divided into at least the following parts: 1. Patient factors: For patients who are about to undergo surgery, factors such as the patient’s age, usual physical condition, the presence of hypertension, diabetes, the function of other organs, whether they are allergic to certain medications that must be used, and whether they smoke may directly affect the outcome of the surgery. 2. The severity of the disease itself and the difficulty of the surgery and the timing of the surgery: some diseases themselves are already very serious, and any wind or movement may cause serious disability or even death of the patient; some diseases involve a wide range, and a single surgery can only solve the local problem, whether it is the operated part or the remaining part in the perioperative period, the risk will be increased instead; some surgeries, although the lesion is not complicated, but The poor location will also increase the difficulty and complication rate of the surgery. The timing of some surgeries is very important, and the best results can be achieved by operating during the stable phase of the disease. Some families (especially the young parents of small children) cannot listen to the doctor’s advice rationally, but their emotion overcomes their reason, always hoping for an unexpected miracle, delaying the surgery time again and again, and coming to the doctor only when they are very sick and can’t drag on anymore, which in turn reduces the success rate of treatment. 3, the doctor’s factor: each main surgeon in the choice of specific treatment, generally based on their most mature experience to recommend to patients, because this will be the most certain. Therefore, it is important to consult with the main surgeon himself for specific questions. It is perfectly normal for other doctors to have different experiences, skill levels or different recommendations, and you may have eight treatment options if you ask ten doctors. Therefore, other doctors cannot overstep their bounds to answer questions that must be answered by the primary surgeon. 4, the patient’s family factors: for the patient’s disease treatment, is a social engineering. In addition to providing adequate financial support, the role played by the patient’s family cannot be ignored. One patient was unable to be transferred to our hospital after the onset of his illness locally, and his family repeatedly called me, claiming that they only trusted my advice. I repeatedly cautioned him that I did not know the specifics and to respect the local doctor’s treatment plan. But as a result, he took my advice and picked on the local doctor (who was actually not wrong). This only backfired. 5, the problem of understanding the success rate: in general, the success rate is for the population, for the individual, in fact, does not mean much, because for the individual, there are only three cases: well, stable but symptomatic, and death. Even if the doctor tells you that the patient survival rate is 99% in a hundred similar surgeries, there is still one death, and for that patient, the probability of death becomes 100%. 6. The success of the surgery does not necessarily mean an improvement in the quality of survival. It is understandable that patients and their families hope to obtain a longer life cycle and improved quality of life through surgery. However, for brain surgery diseases, life and quality of survival often become something incompatible with each other, and sometimes, even often, a part of the quality of survival needs to be sacrificed to obtain the extension of life cycle. 7. The surgical procedure is only one important part of the overall treatment process. Cerebrovascular disease because of the high risk, the patient is like standing on the opposite cliff, any new blow may make him/her fall and urgently need help, while we medical staff and family members are standing in the safety zone. Surgery is like building a one-way bridge between the opposite cliff and the safety zone on this shore. The job of building the bridge is our task, but we also need the patient to be able to cross this bridge and walk to safety on his or her own. During this walk, other factors, such as rain, wind, lightning, earthquakes, etc., can become new hazards. The difference for the surgeon is the quality of the construction of the bridge, but even the best surgeon cannot guarantee that every patient will be able to cross this bridge and reach safety. Technical success does not necessarily mean that the outcome you expect will necessarily occur. Even with the best efforts of the surgeon, there will always be a few patients who, for a variety of reasons, do not achieve the results we expect. There are many factors that are beyond the surgeon’s control in terms of surgical success. The question of probability is often a question whose answer is pretty much the same as no answer at all.