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Occupational Medicine 1995;45:259-262
© 1995 Society of Occupational Medicine

research-article

Exposure to glycols and their renal effects in motor servicing workers

J. Laitinen*,, J. Liesivuori* and H. Savolainen{dagger}

* Regional Institute of Occupational Health Kuopio, Finland
{dagger} Institute of Occupational Health Services, University of Lausanne Lausanne, Switzerland

Ten car mechanics frequently exposed to glycol-based cooling liquids were followed during a workshift. Airborne ethylene and propylene glycol concentrations in the car mechanics' environment were measured. The car mechanics gave urine samples after the workshift and their excretion of ethylene glycol, propylene glycol, oxalic acid, calcium and ammonia was analysed and compared to that of unexposed office workers. Urinary succinate dehydrogenase activity and glycosaminoglycans were also measured in both groups. Airborne ethylene and propylene glycol concentrations in the car mechanics' environment were negligible. Urinary ethylene glycol excretion in exposed workers was significantly higher than that in unexposed workers, but propylene glycol excretion was at the same level as in controls. In the exposed group, the excretion of the end metabolite of ethylene glycol, oxalic acid (47 ± 11 mmol/mol creatinine, mean ± SD, n= 10) differed slightly from that of controls (36 ± 14 mmol/mol creatinine, mean ± SD, n= 10). Urinary excretion of ammonia was higher among exposed workers than office workers. The excretion of calcium did not differ from that of controls. A marginally decreased urinary succinate dehydrogenase activity was found in the exposed men. The excretion of glycosaminoglycans was significantly lower in exposed workers. Therefore, it seems that ethylene glycol is absorbed by skin contact. The internal body burden is associated with oxaluria and increased ammoniagenesis typical of chronic acidosis.

Correspondence and reprint requests to: J. Laitinen, Regional Institute of Occupational Health, PO Box 93, SF-70701 Kuopio, Finland


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