Evaluation of a population with occupational exposure to airborne ammonium perchlorate for possible acute or chronic effects on thyroid function.
Employees at an ammonium perchlorate production facility in Nevada and a larger control population from the same chemical complex without direct AP exposure were monitored extensively for airborne perchlorate exposure.
Single-shift and working-lifetime cumulative dose estimates were made using standard breathing-rate estimates and assuming rapid absorption, based upon solubility.
Calculated single-shift doses ranged from 0.2 to 436 mug/kg, with an average of 36 mug/kg.
Working-lifetime cumulative doses in the higher exposure group ranged from 8,000 to 88,000 mug/kg, with an average of 38,000 mug/kg.
Thyroid profiles, including free thyroxine index and thyroid-stimulating hormone level, were obtained both before shift and after shift to assess thyroid-axis perturbation due to single working-shift perchlorate exposure.
Thyroid-function data were also analyzed with respect to estimates of cumulative exposure to assess any measurable chronic effects on thyroid gland function.
Additionally, standard clinical blood test parameters of liver, kidney, and bone marrow function were evaluated to assess any measurable chronic effects of perchlorate exposure on those organs.
Multiple regression was used to assess the effects of exposure variables and demographic variables on organ function parameters.
No perchlorate-attributable effects on thyroid, bone marrow, kidney, or liver function were detected.
Mots-clés Pascal : Exposition professionnelle, Médecine travail, Industrie chimique, Perchlorate, Ammonium, Thyroïde, Surveillance, Teneur air ambiant, Lieu travail, Dose absorbée, Evaluation, Analyse statistique, Régression multiple, Homme, Etude cohorte, Toxicité
Mots-clés Pascal anglais : Occupational exposure, Occupational medicine, Chemical industry, Perchlorates, Ammonium, Thyroid gland, Surveillance, Ambient air concentration, Work place, Absorbed dose, Evaluation, Statistical analysis, Multiple regression, Human, Cohort study, Toxicity
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0075226
Code Inist : 002B03L06. Création : 31/05/1999.