Recently, a number of suspected gas use safety accidents occurred in Sichuan Province, killing a total of 11 people, of which 5 people died of carbon monoxide poisoning in Chengdu on February 16 alone. The reporter inquired about 11 case reports and found that rental houses are the hardest hit area of carbon monoxide poisoning. Zheng Xiannian, director of the emergency department of Wuhan fifth hospital, analyzed that many rental houses do not have independent toilets. In order to facilitate bathing, some tenants will install a gas water heater and gas tank in the room. The direct exhaust gas water heater will directly discharge the waste gas into the air. If the liquefied gas is not fully burned and the bathing time is too long, people may have accidents. In addition, the temperature has been low recently. Among the 11 carbon monoxide poisoning incidents in Sichuan, many were caused by improper use of charcoal for heating. "Winter and spring are the high incidence season of carbon monoxide poisoning, and the high incidence month is from November to march of the next year." Zheng Xiannian said that carbon monoxide is a colorless and odorless harmful gas, also known as the "silent killer". The product of incomplete combustion of carbonaceous substances will cause carbon monoxide poisoning if inhaled through the respiratory tract. "The binding capacity of carbon monoxide and hemoglobin is 200-300 times higher than that of oxygen and hemoglobin." Zheng Xiannian said that carbon monoxide is very easy to combine with hemoglobin to form carboxyhemoglobin, which makes hemoglobin lose its ability and function of carrying oxygen, resulting in tissue asphyxia. The main clinical manifestation is hypoxia. Excessive inhalation of carbon monoxide will lead to hypoxia and asphyxia of human tissues, damage to tissues and cells of the whole body, and even death. Zheng Xiannian reminded that the best way to avoid carbon monoxide poisoning is to maintain good ventilation and install domestic gas alarm. When using the water heater, it is recommended to use it continuously for no more than 30 minutes. If it is used by more than one person, there should be sufficient time interval, and it is necessary to ensure that the indoor air is fresh and the oxygen is sufficient. In case of carbon monoxide poisoning, immediately open the window for ventilation, quickly transfer the poisoned person to the ventilation place and call 120 emergency telephone. (outlook new era)