The first aid measures for acute carbon monoxide poisoning are mainly to restore oxygen levels in the blood and to restore normal vital signs. The first step is to get away from the scene of carbon monoxide to a place with fresher air, and to give high and continuous oxygen. Open intravenous access, and give energy combinations. In addition, monitor vital signs and transfer to a hospital emergency room or ICU. At this time, closely observe the changes in body vital signs, test the level of carboxyhemoglobin, and clarify the degree of carbon monoxide poisoning. If the condition is severe, hyperbaric oxygen chamber treatment is given to correct the possible disorders of water-electrolyte and acid-base balance.