工频电磁场作业人员周围血淋巴细胞微核分析

Analysis on micronucleus of peripheral blood lymphocytes in workers exposed to power frequency electromagnetic fields

目的探讨长期接触工频电磁场对变电站作业人员周围血淋巴细胞的微核以及淋巴细胞转化的影响。方法采用单纯随机抽样方法,选择54名工龄1.0年以上的500 kV变电站工频电磁场作业人员为接触组,选择54名同单位无职业性工频电磁场接触的人员为对照组,采集2组人群周围静脉血,提取淋巴细胞,检测微核细胞率、微核率以及淋巴细胞转化率,分析其变化情况。结果与对照组比较,接触组及其工龄≤10.0年亚组和工龄>10.0年亚组人群周围血淋巴细胞的微核细胞率、微核率及淋巴细胞转化率均无出现有统计学意义改变(P>0.05)。结论长期接触工频电磁场对作业人员周围血淋巴细胞的微核以及淋巴细胞转化均无明显影响。

Objective To examine the effects of long-term exposure to power frequency electromagnetic fields on the occurrence of micronucleus in peripheral blood lymphocytes and the lymphocyte transformation in transformer substation workers. Methods By simple random sampling method,54 workers exposed to power frequency electromagnetic fields for more than 1. 0 year and other 54 non-exposure workers in 500 kV transformer substations were chosen as the exposure group and control group,respectively. The peripheral venous blood of subjects in these two groups was collected,and then the lymphocytes were separated. The micronucleus cell rate,the micronucleus rate and the lymphocyte transformation rate were detected and analyzed. Results Compared with the control group,the micronucleated cell rate,the micronucleus rate,and the lymphocyte transformation rate of the exposure group and its different length of service subgroups（ ≤ 10. 0and 〉10. 0 years） showed no statistical significance respectively（ P 〉0. 05）. Conclusion The long-term exposure to power frequency electromagnetic fields has no obvious effects on the micronucleus and lymphocyte transformation in the peripheral blood lymphocytes of exposed workers.