Hampson Neil B, Holm James R, Courtney Todd G
Virginia Mason Medical Center, Seattle, Washington U.S.
Undersea Hyperb Med. 2017 Jan-Feb;44(1):11-15. doi: 10.22462/1.2.2017.3.
The incidence of intentional carbon monoxide (CO) poisoning is believed to have declined due to strict federal CO emissions standards for motor vehicles and the uniform application of catalytic converters (CC). We sought to compare ambient CO levels produced by automobiles with and without catalytic converters in a residential garage, as well as from other CO sources commonly used for intentional poisoning.
CO levels were measured inside a freestanding 73 m3 one-car garage. CO sources included a 1971 automobile without CC, 2003 automobile with CC, charcoal grill, electrical generator, lawn mower and leaf blower.
After 20 minutes of operation, the CO level in the garage was 253 PPM for the car without a catalytic converter and 30 PPM for the car equipped withone. CO levels after operating or burning the other sources were: charcoal 200 PPM; generator >999 PPM; lawn mower 198 PPM; and leaf blower 580 PPM.
While emissions controls on automobiles have reduced intentional CO poisonings, alternate sources may produce CO at levels of the same magnitude as vehicles manufactured prior to the use of catalytic converters. Those involved in the care of potentially suicidal individuals should be aware of this.
由于联邦对机动车严格的一氧化碳（CO）排放标准以及催化转化器（CC）的统一应用，故意一氧化碳中毒的发生率据信有所下降。我们试图比较在住宅车库中，有催化转化器和没有催化转化器的汽车产生的环境一氧化碳水平，以及其他常用于故意中毒的一氧化碳来源产生的水平。
在一个独立的73立方米单车位车库内测量一氧化碳水平。一氧化碳来源包括一辆1971年没有催化转化器的汽车、一辆2003年有催化转化器的汽车、木炭烤架、发电机、割草机和吹叶机。
运行20分钟后，没有催化转化器的汽车使车库内一氧化碳水平达到253 ppm，有催化转化器的汽车使车库内一氧化碳水平达到30 ppm。运行或燃烧其他来源后一氧化碳水平分别为：木炭200 ppm；发电机>999 ppm；割草机198 ppm；吹叶机580 ppm。
虽然对汽车的排放控制减少了故意一氧化碳中毒事件，但其他来源产生的一氧化碳水平可能与使用催化转化器之前制造的车辆产生的水平相当。参与照顾有潜在自杀倾向个体的人员应意识到这一点。
