Marchì T, Magarotto G
ULSS 36, Servizio di Medicina del Lavoro, Venezia Marghera.
Med Lav. 1992 Sep-Oct;83(5):410-3.
A group of 66 pot-lining and anode furnace maintenance workers was examined, including 44 workers who had been exposed to these occupational hazards for more than one year. No occupational bronchial diseases were observed. Two cases of 1/0 grade silicosis and two cases of initial palmar aponeurosis retraction were reported. Seventeen cases (38.6%) of occupational hearing loss had been compensated or reported. Hearing loss exceeding the 2nd degree of the Merluzzi scale was observed in 11 workers. There were 13 cases of hearing loss (29.5%) according to ISO criteria, due to exposure levels calculated at 95/100 dB-A eq. Spirometry revealed only one worker with marked reduction in vital capacity. Urinary fluoride concentrations (1.37, S.D. = 0.63 pre-shift and 2.32, S.D. = 1.15 post shift) did not indicate any particular level of hazard. ECGs showed no significant alterations. Variance analysis and multiple regression techniques were used to study the relationship between respiratory volume, hearing capacity, age, duration of exposure and length of past exposure in the construction industry. A marked association was observed between age and hearing loss and a weaker association between duration of exposure and hearing loss.
对66名电解槽内衬和阳极炉维修工人进行了检查，其中44名工人接触这些职业危害因素已超过一年。未观察到职业性支气管疾病。报告了2例一期矽肺和2例初期掌腱膜挛缩。17例（38.6%）职业性听力损失已得到赔偿或报告。11名工人的听力损失超过了梅卢齐量表的二级。根据ISO标准，由于在95/100分贝-A等效连续A声级下计算的接触水平，有13例（29.5%）听力损失。肺功能测定仅显示1名工人肺活量明显降低。尿氟浓度（班前1.37，标准差=0.63；班后2.32，标准差=1.15）未显示任何特定的危害水平。心电图未显示明显改变。采用方差分析和多元回归技术研究了建筑行业中呼吸量、听力、年龄、接触时间和既往接触时长之间的关系。观察到年龄与听力损失之间存在显著关联，接触时间与听力损失之间的关联较弱。
