低浓度铅接触女工血铅与红细胞游离原卟啉的关系

为研究低浓度铅作业对女工是否有影响，调查了铅接触浓度（时间加权平均浓度）为０．０３１５ｍｇ／ｍ＾３的女工８２名，分别测定血游离原卟啉（ＦＥＰ）、血铅、尿铅。结果表明ＦＥＰ、血铅、尿铅与对照组比较差异有显著性（Ｐ＜０．０１）。指标间相关性较好呈剂量－反应关系。血铅和ＦＥＰ阳性检出率分别为２０．７３％和２１．９５％，２项均超过正常上限的检出率（１３．４％）。智商ＩＱ值为６０￣７９、８０￣８９、９０￣１

Relationship between blood lead and free erythrocyte-protoporphyrin of female workers exposed to low concentration of lead operating environment

The thesis focused in the research on whether low-lead operation would have effects on female workers. Based on investigation of 82 female workers under an operation environment with lead concentration of 0.0315 mg/m3, the following report indicated that differences did exist in terms of free erythrocyte-protoporphyrin(FEP), lead-blood(Pb-B) and lead-urine(Pb-U) values between the exposure and control groups. Pb-B, FEP and Pb-U were found closely interrelated and comparatively sensitive. Dose-response relationship was discovered in the process, positive percentage of Pb-B and FEP were 20.73% and 21.95% respectively, 13.4% above the maximal standard in both cases. In consequence, it was concluded that exposure to the 0.0315 mg/m3 lead concentration (0.03 mg/m3 being the normal) was still harmful to the female workers. Apart from that, the article suggested that the upper limit of lead in blood for common women (in Changchun city) was properly defined at 1.46 mumol/L. With FEP as the standard, the article made repective comparisons on the female workers' intelligence quotient (IQ) and the symptom occurrence of the neural system. People with IQ value between 60 to 79, 80 to 89, 90 to 109 or 110 to 119, the rates of showing positive report with FEP > or = 0.90 mumol/L were 27.6%, 22.6% and 15.0% respectively. The general occurrence rate on various level of FEP was obviously higher than that of the control group. The highest occurrence rate of 208.32% and 58.74% appeared when the FEP value was between 0.36 mumol/L to 0.54 mumol/L. When we made the comparison according to different symptoms as headache, dizziness, hypomnesis, somnipathy, palpitation and ephidrosis, the occurrence rate of headache was distinctively highger than that of the somnipathy.