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首页> 外文期刊>Medical Gas Research >Respiratory effects of occupational exposure to low concentration of hydrochloric acid among exposed workers: a case study in steel industry
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Respiratory effects of occupational exposure to low concentration of hydrochloric acid among exposed workers: a case study in steel industry

机译：职业暴露于低浓度盐酸中的工人的呼吸作用：以钢铁行业为例

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Occupational exposure to hydrochloric acid in pickling of steel for remove rust or iron oxide scale from iron processing occurs at low concentration. This study aimed to investigate the respiratory symptoms and pulmonary dysfunction caused by exposure to low concentration of hydrochloric acid in acid washing unit in one of the steel industries. A case control study was carried out in the acid washing unit of the cold rolling of the steel industry in 2017. The exposed group included 45 male workers, and another 41 unexposed employees from official employees were enrolled as control group. A questionnaire was used to collect personal and occupational data and pulmonary function tests, including forced vital capacity (FVC), forced expiratory volume in the first second and peak expiratory flow rate followed guidelines given by the American Thoracic Society and measured with a portable calibrated vitalograph spirometer. For determination of acid concentration, 21 breathing zone air samples were collected in accordance with Method 7903 NIOSH. The findings showed that nose sensitivity, throat irritation and shortness of breath were the highest prevalence symptoms among exposed persons (30.4% to 32.6%). Also, the results showed that FVC and forced expiratory volume in the first second had highest and direct or positive correlation with height (0.965 and 0.927, respectively). Age and weight put in the next priorities (P 0.01). On the other hand, based on the results of multivariate linear regression, exposing to the acid and job history are two main predictor factors for FVC. So that, the exposing to acid, by itself can reduce FVC as 4.386 units. This value is equal to 1.117 for the job history. Exposure to low concentrations of hydrochloric acid alone could increase the risk of respiratory tract damage and pulmonary function disorders. But the extent to which it can cause respiratory complications for occupational exposure is still unknown and requires further study. This study was approved by Ethical Committee of Qom University of Medical Sciences (approval No. IR.MUQ.REC.1397.118) on November 6, 2018.
机译：为了降低铁加工中的铁锈或氧化铁皮，在酸洗中对钢进行酸洗，使之职业暴露于低浓度。这项研究旨在调查钢铁行业之一的酸洗装置中因暴露于低浓度盐酸而引起的呼吸道症状和肺功能障碍。 2017年，对钢铁行业冷轧酸洗装置进行了案例对照研究。暴露组包括45名男性工人，另外41名正式雇员中未暴露的雇员也加入了对照组。使用问卷调查表收集个人和职业数据以及肺功能测试，包括强制肺活量（FVC），第一秒钟的强制呼气量和呼气峰值流量，遵循美国胸科学会提供的指南，并使用便携式校准的生命记录仪进行测量肺活量计。为了测定酸浓度，根据7903 NIOSH方法收集了21个呼吸区空气样品。研究结果表明，在暴露人群中，鼻子敏感，喉咙刺激和呼吸急促是患病率最高的症状（30.4％至32.6％）。此外，结果还显示，第一秒的FVC和强制呼气量与身高呈最高正相关或正相关（分别为0.965和0.927）。年龄和体重是下一个优先事项（P <0.01）。另一方面，基于多元线性回归的结果，暴露于酸和工作经历是FVC的两个主要预测因素。因此，暴露于酸本身可以将FVC降低为4.386个单位。对于作业历史，此值等于1.117。仅暴露于低浓度的盐酸会增加呼吸道损害和肺功能障碍的风险。但是，它在多大程度上可能引起职业性呼吸道并发症并尚待进一步研究。这项研究于2018年11月6日获得库姆医科大学伦理委员会批准（批准号IR.MUQ.REC.1397.118）。

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