When air enters the blood vessel when the human body is in suspension, it is necessary to see how many milliliters of air it is, if it is within 1 ml of air it is not relevant. If the air is within 1-5 ml, the patient needs to be strictly observed, such as monitoring the patient’s vital signs, such as heart rate, blood pressure, pulse, especially changes in oxygen saturation, body temperature and urine output, for 30-45 minutes, and it does not matter if there is no change in the vital signs. However, if the air injected into the blood vessel is between 5-20 ml, immediate symptomatic treatment is required. In addition to immediate monitoring of vital signs, such as oxygen saturation, heart rate, blood pressure, pulse, respiration and body temperature, the patient’s urine output should be monitored, and the patient should be immediately placed in the left lateral position, while high-flow oxygen should be given to prevent pulmonary embolism, and no further Clinical infusion should not be continued at this time. If the amount of air entering exceeds 20 ml, the patient needs to be immediately resuscitated and should be admitted to a hyperbaric chamber for treatment.