To study the association in a group of battery manufacturing workers between computerised postural sway parameters and present concentrations of blood lead (PPb), index of cumulative blood lead years (CBI), and cumulative blood lead at different years of exposure (CPbYs).
Methods-Postural stability was investigated with a computerised postural sway measurement system in 60 workers exposed to lead with exposure duration of 84 (range 3-366) months and in 60 control subjects.
An index of CBIs in 55 workers (previous blood lead results of five workers were not available) and CPbYs were computed for each worker by calculating the area under the curve of concentrations of blood lead against time.
The mean (SD) PPb was 36.0 (11.7) (range 6.4 to 64.5) mug/dl for the exposed workers and 6.3 (2.4) (range 3.1-10.9) mug/dl for the 14 randomly selected control subjects.
Significant differences between groups for the postural sway parameters obtained when the eyes were closed were found for length of sway path (L) ; mean velocity of the centre of pressure along its path (Vel) ; area included within the path of the centre of pressure (Ao) ; 95% confidence elliptical area (Ae).
The Romberg ratio (the relation between eyes closed and open) for the Vel, L, Ao, and Ae of the exposed group were also significantly different from those of the controls.
The postural sway parameters (eyes closed) were not significantly correlated with PPb or CBI.
However, the cu...
Mots-clés Pascal : Plomb, Métal lourd, Accumulation biologique, Relation concentration activité, Ajustement postural, Stabilité, Toxicité, Taux, Sang, Système nerveux pathologie, Homme, Médecine travail
Mots-clés Pascal anglais : Lead, Heavy metal, Biological accumulation, Activity concentration relation, Postural fitting, Stability, Toxicity, Rate, Blood, Nervous system diseases, Human, Occupational medicine
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0194924
Code Inist : 002B03L05. Création : 199608.