摘要
目的 探讨甲苯对作业工人听力改变的影响。方法 选择接触甲苯超标组(浓度>100 mg/m3)和未超标组(浓度<100 mg/m3)的作业工人各50名,对照组为不接触甲苯作业工人50名,进行纯音测定。结果 超标组的甲苯浓度(264.42±36.99)mg/m3,未超标组甲苯的浓度(66.60±14.11)mg/m3;超标组发生听力异常率36％,对照组为4％,两组比较差异有显著性(P<0.01),超标组与未超标组(16％)比较差异亦有显著性(P<0.05);超标组听力异常出现的频率范围主要在2-6 kHz,并且听力下降率有随工龄增加而升高的趋势。结论 职业性长期接触浓度超标甲苯对作业工人的听力可能有一定的影响。
Objective To study the hearing changes in the workers exposed to toluene. Methods 50 workers exposed to toluene > 100 mg/m3(the above-standard group) and 50 workers exposed to toluene at < 100 mg/m3(the below-standard group) were selected to check their hearings. Another 50 workers not exposed to toluene were served as the control group. Results Toluene concentrations were (264.42±36.99) mg/m3 and (66.60±14.11) mg/m3 in the above-standard groups and in the below-standard group respectively. Hearing abnormalities were 36% in the above-standard group, 16% in the below-standard group and 4% in the control group. There were significant difference between the above-standard group and the control group (P < 0.01) and between the above-standard group and the below-standard group (P < 0.05). In the above-standard group, the frequency of the abnonnal of hearing was at 2 - 6 kHz. Furthermore, the more work-age was, the more abnormal rate of the hearing was. Conclusion It was concluded that toluene could affect the hearing in the workers exposed to toluene.
出处
《中国职业医学》
CAS
北大核心
2004年第3期38-39,共2页
China Occupational Medicine
