When a sudden air embolism occurs during infusion, the contingency plan is as follows: 1. Immediately close the intravenous channel to prevent further air entry, and promptly replace the infusion set and evacuate the residual air in the water and gas. 2. Immediately notify the superior physician and the nurse in charge. 3. Place the patient in the correct position, usually in the left lateral position and in a head-down position, so that the air enters the right ventricle as much as possible to avoid entering the pulmonary artery. 4. 4.Give enough oxygen for oxygenation, if possible, hyperbaric oxygen therapy. 5.If the patient’s condition is critical, resuscitation must be actively carried out. 6.Carefully record the process of resuscitation and the cause of air embolism. 7.Notify the family immediately. 8.Continue to monitor the patient’s heart rate, blood pressure, pulse rate, oxygen saturation and so on throughout the process, and record the resuscitation records and the resuscitation process, and give the patient close monitoring until he is completely out of danger. The patient should be closely monitored until he is completely out of danger.