[Late effects of toxic methemoglobinemia].

A psychological testing rendered it possible to reveal some disorders of the central nervous system in a chemical industry worker who suffered from a serious intoxication with chloronitrobenzene a year ago. Such symptoms as loss of consciousness, convulsions and serious methemoglobinemia were observed. This case indicated a possibility of the development of late effects of poisoning which demand a long-term medical control. The authors explain the necessity to include psychological testing in preventive examination of persons who are at risk of acute poisonings.