In clinical practice, patients with cerebral infarction generally do not require routine oxygen therapy, and only when the patient has obvious hypoxemia, such as when the patient’s oxygen saturation is less than 92%, can the patient be given certain oxygen therapy, which is administered by nasal catheter oxygenation or face mask oxygenation. The purpose of giving oxygen therapy to patients with cerebral infarction is to correct the hypoxemia of patients, which is often caused by the following 2 aspects: 1. Patients with large cerebral infarction or brainstem infarction are affected by intracranial hypertension or brain herniation and other related factors, resulting in respiratory rhythm disorders and respiratory failure, which leads to the hypoxic symptoms of patients and can be given to patients with oxygen therapy. 2, Patients with cerebral infarction have complications such as pneumonic pneumonia and pulmonary infection, which lead to hypoxemia and can be treated with oxygen.