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Original Articles
- Normal Predicted Values of Pulmonary Function of the Primary School Children in Rural Area and Sensitive Index of Respiratory Symptoms.
- Byung Sun Choi, Jung Duck Park, Yeon Pyo Hong, Im Won Chang
- Korean J Prev Med. 1995;28(3):690-705.
- 2,125 View
- 25 Download
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Abstract
PDF - Pulmonary function tests were conducted on 815 healthy primary school children (390 males and 425 female) in rural area using Collins Survey Spirometer (warren E. collins, Inc, U. S. A.) with X-Y Recorder. Respiratory symptoms(cough, sputum, sore throat, chest pain, chest tightness, dyspnea, coryza) were surveyed by the interviews. Multiple regression analysis and regression diagnostics were done for prediction equations of FVC, FEV1, PEFR and FEF25-75% . FVC, FEV1, PEFR and FEF25-75% values in 3 groups of children classified by the number of symptom were compared each other through standard variable value. FVC, FEV1, PEFR and FEF25-75% showed highly significant correlation with age, height and weight. Prediction equations for FVC, FEV1, PEER, FEF25-75% are functions of height only in both male and female children aged between 6 and 12 years old. PEFR showed a significant difference related with the number of symptom in female. These results suggest that the PEFR is sensitive PFT parameter in this study.
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Summary
- Study on the Pulmonary Function in Welding Fume Exposed Workers.
- Young Seoub Hong, Byoung Gwon Kim, Sung Ryul Kim, Do Won Dam, Jung Man Kim, Kap Yull Jung, Joon Youn Kim
- Korean J Prev Med. 1995;28(1):43-58.
- 2,153 View
- 22 Download
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Abstract
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- In order to study the effect of welding fume exposure upon the pulmonary function test, we examined 131 shielded arc welding workers, and 152 CO2 arc welding workers as cases and 172 control workers for their general characteristics, and forced vital capacity (FVC), forced expiratory volume in one second (FEV1.0) forced expiratory volume in one second as a percent of FVC(FEV1.0%), and maximal mid-expiratory flow (MMF) were obtained from in the spirogram. In shielded arc welding group and CO2 arc welding group, FVC, FEV1.0, FEV1.0%, and MMF were significantly decreased than control group, especially marked in the MMF finding. The distribution of workers below normal range was as follows: in the shielded arc welding group, 2 workers(l.5%) for FVC, 17 workers(13.0%) for FEV1.0, 5 workers(3.8%) for FEV1.0%, 28 workers(21.4%) for MMF, and in the CO2 arc welding group, 3 workers(2.0%) for FVC, 25 workers(16.4%) for FEV1.0, 8 workers(5.3%) for FEV1.0% and 37 workers(24.3%) for MMF, and significant increase by exposure duration was found in MMF. The distribution of workers who had ventilation impairment was as follows: 5 workers(3.8%) for obstructive type, 2 workers(l.5%) for restrictive type in the shielded arc welding group and, workers(4.6%) for obstructive type. 2 workers(l.3%) for restriotive type, and 1 worker(0.6%) was combined type of the CO2 arc welding group. In the respect of these results the significant pulmonary function and ventilatory impairment were observed in welding fume exposed workers who had not abnormal finding in chest X-ray, and MMF considered as the most sensitive pulmonary function index by welding fume exposure. Therefore even if it is hard to doing pulmonary function test in the first health examination of workers according to the Industrial Safety Health Act in the welding fume exposure workers. it is desirable to consider doing PFT. Also evaluating the ventilation impairment, it is necessary, to observe the change of MMF that marker of effort-independent portion.
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Summary
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