Avaliação da exposição ao mercúrio e seus compostos em mães e seus recém-nascidos em Porto Velho - RO

Abstract

A hundred and three binomials mother-son bomed in hospitaIs of the city of Porto Velho - RO, during the months of November/2000 up to February/2001. Samples of the mother's hair were analyzed and of the newly born, maternal blood, placenta and umbilical cord. The collections of the samples were accomplished in the moment of the childbirth. A questionnaire was applied to mother where enrolled important information for the risk of contamination mercurial and/or congenital anomaly. The products of the gestation that presented congenital anomaly were included in the study. The measure of the exhibition to the Methylmercury was made using the collected biologic marker and accomplishment of techniques through the method of spectofotometric of atomic absorption for the cold vapor. The practical factor of total conversion was used in mercury that is from 0,90 to 0,92. After analysis and statistical study the main conclusions were: the alcoholic drink consumption during the pregnancy, and other variables, didn't influence in the congenital anomaly apparently, mainly neural tube defects (NTD); most of the found congenital anomaly was NTD (66,6%) that were significant correlated with the levels of total mercury in the hair of the newly born; the levels of total mercury, in the placenta and in the umbilical cord, they were equivalent.