Some observations on workers exposed to methylene chloride.

Abstract
An excess of self-reported neurological symptoms was found when 46 men exposed to methylene chloride at concentrations < 100 ppm were compared with a non-exposed referent group. A follow-up study on 29 men was carried out to see whether there was any neuropsychological damage in the exposed men. Age-matched controls were selected from among men working on a similar process with no exposure to solvents. Each man in the study had a clinical examination; motor conduction velocities were measured in the ulnar and median nerves; ECG was taken and a psychological test battery designed to detect minimal brain damage was administered. No evidence was found of long-term damage that could be attributed to exposure to methylene chloride.

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