目的　探讨低水平铅暴露对儿童持续性注意力的影响。方法　随机选取 2 0 0 3年 7月至 2 0 0 4年 1月大连市儿童医院健康体检 6～ 15岁儿童 92名为研究对象 ,耳垂采血 10 0 μL ,阳极溶出伏安法测定血中铅水平 ,分高血铅组 (≥ 0 4 83μmol/L)和低血铅组 (<0 4 83μmol/L)。采用视听整合持续操作评估系统 (IVA CPT)测定儿童的听觉及视觉持续注意力水平。结果　高血铅组的持续操作测验的各商数分值明显低于低血铅组 ,差异有显著意义 (P <0 0 5或P <0 0 1) ,血铅与综合注意力商数和视觉注意力商数之间有负相关关系 (r =- 0 2 5 7,- 0 2 31,P <0 0 5 )。结论　低水平铅暴露对儿童的视、听觉持续注意能力有负性影响 Objective To investigate the effect of low level lead exposure on children’s persistent attention. Methods A total of 92 healthy children aged 6-15 years old from Dalian Children’s Hospital from July 2003 to January 2004 were selected as research objects. Blood samples were collected from the lobe and blood samples were collected by anodic stripping voltammetry The levels were divided into high blood lead group (≥0 83 83μmol / L) and low blood lead group (<0 4 83μmol / L). Audiovisual Integrated Continual Operational Assessment System (IVA CPT) was used to measure the level of children’s hearing and visual distraction. Results The scores of continuous quotient of hyperbaric lead group were significantly lower than that of low blood lead group (P <0.05 or P <0.01), and blood lead and comprehensive quotient quotient and There was a negative correlation between visual attention quotient (r = - 0 2 5 7, - 0 2 31, P 0 05). Conclusion Low levels of lead exposure have a negative impact on children’s visual and auditory sustained attention