Respiratory failure is a relatively common pathological state of the respiratory system. It is caused by severe impairment of ventilation and air exchange in the lungs due to various reasons. The inability of the lungs to ventilate and replace air normally can lead to insufficient oxygen inhalation and carbon dioxide retention, which can cause metabolic disorders. Clinically, this can manifest as simple hypoxia, such as hypoxemia, and is called type I respiratory failure. The presence of both hypoxemia and hypercapnia is called type II respiratory failure. Complications such as infection, cardiac failure, renal failure, and gastrointestinal bleeding can occur.