Revista de Saúde Pública
On-line version ISSN 1518-8787
CORDEIRO, Ricardo; LIMA FILHO, Euclydes C. and SALGADO, Paulo E. T.. Neurological disturbances in workers with low levels of lead in the blood. I: Peripheral neuropathy. Rev. Saúde Pública [online]. 1996, vol.30, n.3, pp. 248-255. ISSN 1518-8787. http://dx.doi.org/10.1590/S0034-89101996000300007.
This is a cross-sectional study with a randomized choice of individuals aiming at studying the validity of the Brazilian biological exposure limits applied to lead level in the blood (PbB) and delta-aminolevulinic acid in the urine (ALAU), which are 60 µg/dl and 10 mg/g.creat., respectively. For this purpose, twenty workers, whose PbB and ALAU values have been below these limits over the past two years, were selected at random at a battery production plant in the State of S. Paulo, Brazil. The workers were submitted to a peripheral nerve conduction study. The results were compared with those obtained for workers of a control group also chosen at random. The lead workers showed a decrease in the velocity conduction of the radial nerves. Comparing this group with a randomized control group, a significant difference was observed (p-value = 0.0067). The results suggest that the Brazilian biological exposure limits above should be rearranged.
Keywords : Occupational exposure [standard]; Lead poisoning [prevention]; Peripheral nervous system diseases [chemical induced].