学龄前儿童血铅、发铅含量及其与生长发育的关系

Study of Blood and Hair Lead Level and Its Relationship with Growth in Preschool Children

实验选择重庆市城区相同年龄段（6～7岁）学龄前儿童240名，男、女各半，观察儿童血铅、发铅含量及其与生长发育的关系。结果显示：生活在重庆闹市区的学龄前儿童受到的铅污染相当严重，以推荐的0．483μmol／L为全血铅可接受上限值，则春季有50．9％（平均0.483μmol／L）儿童，秋季有高达81.66％（平均为0.650μmol／L）儿童血铅浓度超过标准，发铅的测定也显示相似结果。本实验还发现重庆春、秋两季，男、女性别之间儿童铅含量有较大差异，以秋季男性儿童血铅、发铅含量为高，这种差异可能与重庆地理气候、男性儿童户外活动等有关。另外，学龄前儿童膝高与血铅、发铅水平存在显著负相关，揭示体内铅含量可能直接影响儿童生长发育。

The content of blood and hair lead was determined in 240 preschool children aged 6 to 7years. It showed that lead pollution to the children living in urban area of Chongqing City was rather serious. More than 50. 9% and 81 .66% of the Children determined in spring and in fall respectivehy hadblood lead concentrations above 10Ug/dL, which is similar to the result of hair lead determination.Futhermore, the blood Pb or hair Pb level was negatively correlated with the knee height of children. Itsuggests that Pb exposure will restrain the growth of children.