Smokey’s disease is a less common cerebrovascular disease, most people may not have heard of such a disease, and even many grass-roots medical workers do not know much about it. Smoke disease, also known as abnormal vascular network disease of the skull base, is due to the cerebral arterial ring on both sides of the main branches of the blood vessels, such as the internal carotid artery siphon, anterior cerebral artery, middle cerebral artery, etc. Chronic progressive stenosis or occlusion, secondary to the penetrating arteries at the base of the skull through the emergence of small blood vessels of the compensatory anomalous proliferation of newborn compensatory blood vessels is very small and fragile, the cerebral angiographic examination presents a group of a smoky image, so it was These new compensatory vessels are very small and fragile and appear as a cloud of smoke on cerebral angiography, so it is called smog disease. Smoke disease is usually treated with surgery. Some patients ask what tests should be done before surgery for smoke disease? Neurosurgeons need to arrange preoperative tests according to the patient’s condition. General first need to clarify the diagnosis, the current diagnosis of smog disease is the gold standard of cerebral angiography, that is, DSA examination, this is the majority of patients need to do, this is not only to clarify the diagnosis, but also the DSA examination can be comprehensive and dynamic reflection of the patient’s intracranial vascular situation and blood flow direction, etc., for the diagnosis and assessment of smog disease and the development of the surgical program to provide an accurate and comprehensive objective basis; of course, if it is a particularly small child Of course, if a child is particularly small and not suitable for DSA examination, the doctor will also give alternative means of examination. In addition, there are some routine pre-operative examinations to comprehensively assess the patient’s overall physical function, including blood tests, cardiopulmonary and other major organ function tests, etc., to assess whether the patient’s body can tolerate the surgery, whether there are contraindications to surgery, etc. Of course, during the current epidemic, the doctor will also provide an alternative means of examination. Of course, during the current epidemic, several new coronavirus nucleic acid tests will be performed before and after hospitalization. Patients with smog disease who are evaluated to meet the indications for surgery are recommended to undergo surgery in a timely manner. The type of surgery is very important, like the traditional simple direct bypass or simple patch surgery, there are still some limitations and shortcomings, for example, direct bypass blood supply is limited to improve the scope of the slow onset of the patch surgery, it usually takes 3-6 months to grow neovascularization, and during this period of time, there is still a risk of stroke, so these two simple surgical methods are not yet ideal.