22例天然气不完全燃烧废气中毒案件分析

Poisoning by Exhaust Gas of the Imperfect Combustion of Natural Gas: 22 Cases Study

目的 分析天然气不完全燃烧后废气中毒案件特点,为法医学鉴定以及事故的预防提供参考.方法 收集2004 2013年间上海市闵行区天然气不完全燃烧后废气中毒案件22例,从死亡人员一般情况、案件发生时段及天气、现场情况、尸体检验等进行回顾性分析.结果 22例案件中,男性死者15人,女性死者16人,年龄在2～82岁,事发时间主要在1和2月（各8例）,事发地点基本在小面积公寓房（21例）,所有案件中使用燃气热水器时排气口旁均留有较宽的缝隙. 结论 通风窗口在燃气热水器排气口旁边的小面积公寓房易发生天然气不完全燃烧后废气中毒事故,在寒冷季节应注意废气中毒现场的勘察.

Objective To analyze the case characteristics of poisoning by exhaust gas of the imperfect combustion of natural gas and provide references for forensic identification and prevention of such acci- dents. Methods Twenty-two cases of poisoning by exhaust gas of the imperfect combustion of natural gas in Minhang District during ：2004 to 2013 were collected. Some aspects such as general conditions of deaths, incidence time, weather, field investigation, and autopsy were retrospectively analyzed. Results In the 22 cases, there were 15 males and 16 females. The age range was between 2 and 82 years old. The major occurring time was in January or February （8 cases in each） and the cases almost occurred in small area room （21 cases）. There was wide crack next to the exhaust port when the gas water heater was been used in all cases. Conclusion There are more prone to occurrence of exhaust gas poisoning of imperfect combustion of natural gas in small area room with a ventilation window near the exhaust port of gas water heated. It shows that the scene of combustion exhaust gas poisoning should be more con- cerned in the cold season.