![]() ![]() Concentrations of CO in exhaust from gasoline engine have also decreased in recent years with the introduction of three-way catalytic converters. The main sources of CO encountered in poisoning cases are house fires (the maximum concentration of CO in air is around 5 % in the immediate vicinity of a house fire), incomplete combustion of fuels ( e.g., charcoal, briquette, fuel gas, petroleum) using a burner, heating or cooking equipment with insufficient ventilation or improper maintenance, exhaust gas from vehicles using internal combustion engines (the CO concentration in exhaust gas is less than a few percent), and industrial accidents (such as those occurring at iron foundries or chemical plants).Įxhaust from a diesel engine contains approximately 0.01–0.06 % CO, and inhalation does not cause fatal CO poisoning. ĬO is formed by incomplete combustion of organic compounds. Information from suicide-related websites may facilitate suicide by CO. This may be attributable to an increase of suicides by means of CO inhalation. However, deaths from CO poisoning doubled in 2003 compared to that for 2001 in Japan. The worldwide incidence of CO poisoning has remained stable during the last 25 years. This is mirrored in several other countries, ,, ,, , ]. 1), and it is a major cause of poisoning deaths. The annual number of CO poisoning death in Japan is about 2000–5000 ( Fig. Vehicle exhaust, smoke from fires and improperly maintained heating systems are included as common sources. This gas is mainly produced by incomplete combustion of organic compounds. As the specific gravity of CO is 0.97, it is slightly lighter than air. This review article discusses carbon monoxide (CO) poisoning from a clinical point of view.ĬO – sometimes termed a “silent killer” is a colorless, odorless, and non-irritable gas. Numerous poisons, from natural toxins to synthetic chemicals existing in our environment, can produce a wide variety of deleterious effects in living organisms.
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