Ischemic stroke is a series of lesions that occur after ischemia or thrombosis of brain tissue due to narrowing or occlusion of cerebral blood vessels, which manifests as transient neurological dysfunction in mild cases and leads to permanent disability or even death in severe cases, accounting for more than 80% of all stroke attacks. The main cause of ischemic stroke is atherosclerosis, while other causes include arterial entrapment, heart disease, arteritis, smog, blood disorders, and immune disorders. The vast majority of strokes are due to arterial stenosis, and the mechanisms are: 1. low perfusion phenomenon: arterial stenosis causes insufficient blood perfusion to the distal brain tissue, and when the degree of stenosis is high, the collateral circulation cannot compensate, and the distal blood flow is reduced, which cannot maintain the metabolic demand of the brain, a stroke will occur; 2. embolism embolism vessels: atherosclerotic plaque rupture leads to embolism dislodged to block the normal cerebral artery to cause stroke; 3. arterial Thrombosis occlusion of blood vessels: the roughness of the intima of the stenosis leads to the formation of arterial thrombosis triggering stroke. There are two best times to treat stroke: during the acute attack and after the first stroke attack. The vast majority of patients will have some minor episodes before a major stroke attack, and these minor episodes are like early warning alarms that are often ignored and the first best time to treat them is lost. Once a larger stroke episode has occurred, many physicians may focus purely on giving conservative medical treatment while neglecting etiologic testing, thus missing the second treatment opportunity. For ischemic stroke, traditional conservative medical treatment is very limited. In recent years, interventional techniques have been gradually developed and shown to be significantly better than medical treatment in the acute phase of stroke and prevention of stroke recurrence, and can play an efficient role in the treatment and prevention of stroke through minimally invasive procedures. Interventional therapy involves making an incision of about 2 mm from the root of the thigh under X-ray surveillance, placing a sheath, and then inserting a catheter through the sheath to the corresponding cerebral artery to make diagnosis and treatment through the catheter. To use an analogy, the blood vessels in the human body are like crisscrossing pipes. When the pipes are narrowed or blocked, a janitor needs to be dispatched to unblock the pipes. Interventional treatment involves transporting different types of workers, with the aid of auxiliary tools, through these “rivers” to the blockage, and then using different methods, such as drug injection and dilation, depending on the nature of the lesion. Brain tissue is extremely sensitive to ischemia, and some studies have shown that irreversible damage to brain cells can occur within 6 minutes of complete ischemia. Therefore, the key to the treatment of acute cerebral infarction is to open the occluded cerebral vessels as early as possible and restore the blood supply to the brain tissue. Currently, acute interventional therapy, especially arterial interventional opening, is one of the most advanced treatment methods for acute cerebral infarction. Patients, especially those with high blood sugar, hypertension, hyperlipidemia and heart disease, are advised to come to the hospital as soon as they have symptoms of limb paralysis or slurred speech or dizziness, so as not to miss the best treatment time.