摘要
本文对某厂15个黄麻粉尘观察点1年的监测，其结果：麻尘年均浓度为24．6mg／m^3(392个样品)，时间加权平均浓度为3．4mg／m^3，接尘工人自觉症状以气短、咳嗽、胸部紧束感为主要表现。慢性鼻炎、咽炎和慢支的患病率分别为15．74%、28.24%、15．28%，与对照组差异显著(P<0．05)，且随工龄的延长而增高。FVC和FEV1有明显下降，提示有慢性肺功能损害。麻尘接触水平与慢支患病率之间呈正相关(r=0.9342)，当慢支患病率控制在15%时，发病年限为30年。黄麻粉尘最高容许浓度的建议值为4mg／m^3.
The jeut dust concentrations in working sites of the jute textile mill were dete mined on 15 monitoring points in one year. The results showed that the mean concentration of jute dust during one year was 24.6mg/m￣3 (392 samples)and 3-day time-weighted average concentartion was 3.4mg/m￣3. The subjective symptoms of the workers were short breath,cough and chest -girdle-sensation.The rates of chronic rhinitis,chronic brothosechiutis and chronic pharyngitis were 15.74%,28.24%,15.28% respectively which was higher than in the controls (p<0.05).FVC and FEV_1 descended which showed thatlthe workers'eung function as chronically injured. There was a positive corelation between exposure level (jute dust concentration)and morbidit yrates of chronic bronchitis in jute textile mill when the workers served for 30 years and the morbidity rate was 15%,MAC of jute dust in workplacexce should be 4mg/m￣3.
