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目的:了解重庆市儿童血铅水平及铅中毒流行状况。方法:在严格质量控制下用原子吸收光谱分析法对儿童末梢血进行血铅浓度测定。结果:6255例儿童血铅值范围是2～428μg/L,均值为50.63μg/L。其中男童血铅水平为52.69μg/L,女童血铅水平为48.14μg/L;血铅水平≥100μg/L者共有393例,占调查人数6.28%,其中男童231例,超标率6.75%,女童162例,超标率5.71%。血铅≥200μg/L的儿童共32例,比例为0.51%。所有不同性别儿童铅中毒检出率的比较无显著差异。不同年龄组儿童血铅水平均值及铅中毒检出率的比较差异显著,铅中毒检出率有随年龄增加而升高的趋势。结论:目前重庆市儿童铅中毒率与其他城市比稍低,但大年龄组儿童血铅水平仍高,应引起全社会及相关行政部门的重视。
Objective: To understand the level of lead in children in Chongqing and lead poisoning prevalence. Methods: The blood lead concentration in children’s peripheral blood was determined by atomic absorption spectrometry under strict quality control. Results: The blood lead value ranged from 2 to 428 μg / L in 6255 children with a mean of 50.63 μg / L. Among them, the level of blood lead in boys was 52.69μg / L and the level of blood lead in girls was 48.14μg / L. There were 393 cases of blood lead levels ≥100μg / L, accounting for 6.28% of the total, including 231 boys, exceeding the standard of 6.75% , 162 girls, exceeding the rate of 5.71%. A total of 32 children with blood lead levels ≥ 200 μg / L had a ratio of 0.51%. There was no significant difference in the detection rates of lead poisoning in all children of different genders. The mean blood lead levels and lead poisoning among children of different age groups were significantly different, and the detection rate of lead poisoning increased with age. Conclusion: At present, the lead poisoning rate among children in Chongqing is slightly lower than that in other cities, but the level of blood lead in children of older age group is still high, which should arouse the attention of the whole society and relevant administrative departments.