Objectives-Assessment of neurophysiological functions in workers with low level exposure to lead and evaluation of the efficacy of bone lead measurements in the prediction of effects of lead.
Methods-Exposure to lead of 60 workers from a lead battery factory was estimated from historical blood lead measurements and analysis of lead in the tibial and calcaneal bones with x ray fluorescence.
Peripheral and central nervous system functions were assessed by measuring conduction velocities, sensory distal latencies, sensory amplitudes, and vibration thresholds as well as by quantitative measurement of the absolute and relative powers and mean frequencies of different electroencephalograph (EEG) channels.
Sensory amplitudes, and to a smaller degree sensory or motor conduction velocities, showed a negative correlation with long term exposure to lead, most clearly with integrated blood lead concentration and exposure time.
Vibration thresholds measured in the arm were related to recent exposure to lead, those measured in the leg to long term exposure.
The alpha and beta activities of the EEG were more abundant in subjects with higher long term exposure to lead.
Calcaneal lead content reflected short term exposure, tibial lead content reflected long term exposure.
Blood lead history showed a closer relation with effects of lead than the tibial or calcaneal lead concentrations. (...)
Mots-clés Pascal : Plomb, Métal lourd, Dose faible, Toxicité, Exposition professionnelle, Médecine travail, Homme, Industrie automobile, Batterie, Neurophysiologie, Test neuropsychologique, Electroencéphalographie, Evaluation, Surveillance biologique, Système nerveux pathologie, Matériel biologique, Sang, Os
Mots-clés Pascal anglais : Lead, Heavy metal, Low dose, Toxicity, Occupational exposure, Occupational medicine, Human, Automobile industry, Battery, Neurophysiology, Neuropsychological test, Electroencephalography, Evaluation, Biological monitoring, Nervous system diseases, Biological material, Blood, Bone
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0430099
Code Inist : 002B03L05. Création : 19/12/1997.