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目的对我市学龄前儿童血铅水平进行分级，并研究相应措施。方法用微分电位溶出法检测我市低铅污染地区2～6岁儿童血铅水平，按美国国家疾病控制中心（CDC）的儿童铅中毒指南分级，对其家长和教师问卷调查。结果Ⅰ级482人（75．67％）、ⅡA级70人（1．99％）、ⅡB级38人（5．97％）、Ⅲ级44人（6．91％）、Ⅳ级3人（0．47％）、Ⅴ级为0；总铅中毒发生率24．33％；各年龄组铅中毒发生率差异明显（P＜0．05），4岁组最高33．81％，3岁组最低18．63％。各年龄组血铅水平绝大多数（99．53％）在Ⅰ－Ⅲ级；铅中毒发生率与性别关系不大（P＞0．05）；用评分法表示铅暴露程度，Ⅱ级儿童铅暴露得分值14～20分，Ⅲ级以上得分18～32分，说明儿童铅污染因素较多。结论 应对不同级别铅水平儿童实施相应的防治措施。
Objective To classify the blood lead levels of preschool children in our city and to study the corresponding measures. Methods The level of lead in children from 2 to 6 years old in the lead-contaminated area of our city was detected by differential potentiometric stripping method. According to the guideline of children’s lead poisoning of the National Center for Disease Control (CDC), parents and teachers were surveyed. Results Grade Ⅰ 482 (75.67%), Grade Ⅱ A 70 (1.99%), Grade Ⅱ B 38 (5.97%), Grade Ⅲ 44 (6.91%), Grade Ⅳ 3 0.47%), grade Ⅴ was 0. The incidence of total lead poisoning was 24.33%. The incidence of lead poisoning in all age groups was significantly different (P <0.05), the highest was 33.81% in the 4-year-old group and the age was 3 years The lowest 18.63%. The majority of blood lead levels in all age groups (99.53%) were in grade Ⅰ-Ⅲ; the incidence of lead poisoning was not related to gender (P> 0.05); the score was used to indicate the extent of lead exposure; Exposure score 14 to 20 points, grade III score 18 to 32 points, indicating that children have more lead pollution. Conclusion Different levels of lead levels children should implement the appropriate prevention and treatment measures.