低浓度苯及同系物对接触工人健康状况的影响

目的]探讨低浓度苯及同系物对接触工人的健康危害,为今后防治苯的危害提供依据。方法]对2个企业苯作业车间空气中毒物浓度进行测定,并对观察组和对照组工人进行健康体检。结果]2个厂工作场所苯浓度短时间接触均值分别为1.03、1.93 mg/m^3,均低于国家职业卫生标准;观察组和对照组的临床症状检出率、心电图、X线胸片及血压异常率的差异均无统计学意义（P〉0.05）;接触组外周血白细胞减少31例,占27.0%,高于对照组,差异有统计学意义（P〈0.01）;观察组年龄和工龄分析表明,白细胞下降有随年龄和工龄增加而降低的趋势,但差异无统计学意义（P〉0.05）。结论]低浓度的苯及同系物可对人体健康产生危害。

Investigation of Health Status in Workers Exposed to Low-level Benzene

Objective]In order to prevent the harmful of benzene,the effects in workers exposed to low-level benzene were investigated.Methods]Air samples of benzene from workplace and occupational health data of workers exposed to benzene and control's workers were collected of 2 Corporations.Results]Results showed that the air benzene levels of workplace in 2 factories were 1.03 and 1.93 mg/m3,respectively,and these concentrations were lower than the Pemissible Concentration-Short Term Exposure Limit.The incidence of clinical symptems,electrocardiogram,X-ray,blood pressure in exposed were not significantly from controls(P>0.05).The decrease proportion of peripheral-blood white blood cell count in exposed workers(31 cases,27.0%) were significantly higher than controls(P<0.01),and the white blood cell decrease has no different from various ages and length of service in exposed workers.Conclusion]The low-level benzene is harmful to exposed workers.