Norimine Eri, Ishizawa Fujio, Honda Katsuya, Uemura Sachiyo
Scientific Criminal Investigation Laboratory, Ibaraki Prefectural Police Headquarters.
Chudoku Kenkyu. 2009 Jun;22(2):121-4.
We had a suicide case suspected to result in death from carbon dioxide poisoning by dry ice in the car. A clay cooking stove with charcoal was in the car, but the charcoal had no burning sign. CO hemoglobin saturation degree of the suicide victim's blood was 0%. Moreover, there were signs that 50 kg of dry ice was brought in the car. To clarify the cause of death, reproducibility testing was carried out by using a car under the same conditions. CO2 concentration in it increased to 22% and O2 concentration decreased to 16% within 20 minutes. From these observations, his death was considered to be caused by hypoxia and CO2 narcosis. CO2 in the suicide victim's blood was higher than those in the blood of healthy persons, and the same range was visible in the blood of fire victims. These data might support above supposition concerned with the cause of death. Blood analysis will be helpful in clearing the cause of death by CO2 poisoning.
我们有一起疑似因车内干冰导致二氧化碳中毒死亡的自杀案件。车内有一个带木炭的土灶，但木炭没有燃烧迹象。自杀受害者血液中的一氧化碳血红蛋白饱和度为0%。此外，有迹象表明车内带进了50千克干冰。为了查明死因，在相同条件下使用一辆汽车进行了再现性测试。20分钟内车内二氧化碳浓度升至22%，氧气浓度降至16%。基于这些观察结果，认为其死亡是由缺氧和二氧化碳麻醉所致。自杀受害者血液中的二氧化碳含量高于健康人血液中的含量，火灾受害者的血液中也出现了相同范围的情况。这些数据可能支持上述关于死因的推测。血液分析将有助于厘清二氧化碳中毒导致的死因。
