Respiratory failure is a common critical condition in clinical settings. At the stage of respiratory failure, patients often experience severe discomfort and pain. Common symptoms include difficulty breathing, with many patients showing obvious respiratory distress, often needing to sit upright to breathe, profuse sweating, and an inability to continue normal activity. Additionally, cyanosis can occur, indicating very severe hypoxia. Symptoms of pulmonary encephalopathy, such as mental confusion, convulsions, and agitation, may also appear. In severe cases, patients may even fall into a coma. Hence, at the stage of respiratory failure, patients suffer considerably.