Distúrbios neurológicos em trabalhadores com baixos níveis de chumbo no sangue. I: Neuropatia periférica
Alternative titleNeurological disturbances in workers with low levels of lead in the blood. I: Peripheral neuropathy
MetadataShow full item record
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.
How to cite this document
Showing items related by title, author, creator and subject.
Canesin, C. A. ; Gonçalves, F. A S ; Leandro, E. ; Pinto, J. O P (SPEEDAM 2008 - International Symposium on Power Electronics, Electrical Drives, Automation and Motion, 2008) [Trabalho apresentado em evento]This paper is based on the analysis and implementation of a new drive system applied to refrigeration systems, complying with the restrictions imposed by the IEC standards (Harmonic/Flicker/EMI-Electromagnetic Interference ...
Ribeiro, Jean Marcos de Souza (Universidade Estadual Paulista (UNESP), 2006) [Tese de doutorado]Este trabalho apresenta três novas estratégias de controle discreto. O enfoque principal do trabalho foi dado ao Controle Discreto com Modos Deslizantes (CDMD) aplicados em sistemas que possuem atraso no processamento do ...
Cardim, Rodrigo ; Teixeira, Marcelo C. M. ; Faria, Flávio A. ; Assunção, Edvaldo (Proceedings of the IEEE International Conference on Control Applications, 2009) [Trabalho apresentado em evento]A simple method for designing a digital state-derivative feedback gain and a feedforward gain such that the control law is equivalent to a known and adequate state feedback and feedforward control law of a digital redesigned ...