It is a very rare cerebrovascular disease, due to the narrowing or occlusion of the main arteries of the brain, which leads to the formation of a smoke-like network of abnormal blood vessels at the base of the skull, the narrowing and occlusion of the blood vessels will lead to insufficient blood supply to the brain, and the abnormal network of blood vessels is very easy to rupture, causing brain hemorrhage. If the disease is not treated, it may be life-threatening at any time. If left untreated, smog can be life-threatening. Conservative treatment is clinically proven to be ineffective, so more people prefer surgical treatment. Some patients ask what is the survival rate of smog patients after surgery and how long they can live. Generally speaking, the survival rate after surgery depends on a number of factors, including the severity of the disease, the timeliness of the surgery, and the method of treatment, but in the case of smog, the treatment depends entirely on the surgical approach. With effective surgical treatment, most patients’ survival will not be affected. Combined vascular bypass surgery is a very safe and reliable procedure that is performed under general anesthesia with a high-powered microscope to ensure a low-risk procedure. Nearly 1,000 cases of smog patients have been restored to normal life through the procedure. It is a dual procedure of direct bypass + patching, which establishes a smooth collateral bypass for the brain in all aspects, supplying sufficient blood to the brain, effectively preventing the occurrence of cerebral ischemia and brain hemorrhage. However, after the combined vascular bypass treatment and restoration of cerebral blood supply, it is also necessary to do a good job of postoperative care, regulate diet, pay attention to exercise and do not stay up late, so that the life expectancy will not be affected.