1. Why can’t we put stents in the hospital immediately after arrival? Not every patient is suitable for stenting, not every patient can be stented, not every stenosis needs to be stented, and not every stent can solve clinical symptoms. For each patient and each lesion, we will fully evaluate and discuss, and only those patients who are considered to be fully benefited by stenting will be selected for placement. For example, a patient with cerebral infarction who had a history of hypertension and heart valve disease was evaluated and found that the cause of the infarction was not due to cerebral stenosis, but to a small embolus caused by heart valve disease that flowed with the blood to the cerebral vessels and blocked the small cerebral vessels after reaching the distal end. If the root cause of infarction is heart valve disease, then stent cannot be put in, as long as sufficient anticoagulation is done to prevent small emboli from forming and falling off. In addition, even if it is very suitable to put stents, it is impossible to put them as they arrive due to many patients. 2. We have already done MRI, why do we need to do it again when we come? Before stenting, we often have to evaluate whether there is a fresh infarct, where the infarct is, how large the infarct is, whether the cerebrovascular stenosis has caused the cerebral blood supply deficiency, and what the nature of the stenosis is. These results are very important for clinical evaluation of stent placement and directly affect the safety and effectiveness of the procedure. For example, fresh large infarcts can easily lead to fatal bleeding if operated immediately, so it is safe to wait until 3-4 weeks after recovery; and there is no need to place stents at all if there is sufficient blood circulation to compensate. And evaluation of these need to be completed by magnetic resonance (the newly developed magnetic resonance technology, also called magnetic resonance, but the content of the examination is not the same). 3.Does it mean that brain infarction will never happen after stent is put in? No, it does not. With age, together with high blood pressure, diabetes, unhealthy diet and other reasons, all human organs are degenerating, and so are blood vessels. Atherosclerosis is the result of this series of causes and eventually affects cerebral blood flow, leading to cerebral ischemic infarction. Medicine up to now can only mechanically lift those very severe stenoses, and there is no radical solution to the cause of the stenosis. It is possible that stenosis may occur again in the place where stents are placed, and stenosis may also occur in the future in a vessel that seems to be fine now, causing infarction. Therefore, in addition to the conventional oral aspirin, the placement of stents can only reduce the possibility of cerebral infarction caused by severe stenosis, but it cannot be completely excluded. 4.Will all the previous symptoms disappear after the surgery? We often encounter this question: Doctor, my partner has been hemiplegic for 10 years, will he be able to get out of bed and walk after the stent is placed? Sorry, no. After all, stent placement is a preventive procedure. For example, a very severe stenosis, which now only causes transient limb weakness, etc., may progress to cerebral infarction and complete paralysis in the short term if left untreated. If interventional treatment is used, the likelihood of cerebral infarction can be reduced. However, there is no treatment significance for cerebral infarction that has already occurred. There are many patients who just have frequent dizziness, drowsiness, sleepiness and dizziness, which are generally caused by insufficient blood supply to the brain but have not yet caused cerebral infarction, and if treated in time, the symptoms can often be significantly improved.