Annals of Occupational and Environmental Medicine

Case Report

Seven Cases of Respiratory Symptoms Caused by Acute Ozone Exposure from an Electronics Company: Yong Jun Kwon, Kuck Hyun Woo, Jin Seok Kim, Seong Yong Yoon, In Ung Song, Jay Young Yu, Seong Yong Cho; Korean Journal of Occupational and Environmental Medicine 2012;24(4):449-459. Published online December 31, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.4.449

BACKGROUND
Ozone is a colorless, pungent, and highly reactive gas. It can cause headaches, burning eyes, irritation to the respiratory passages, and dyspnea. This article describes cases of respiratory difficulty associated with acute ozone exposure from an electronics company that manufactures touchscreen.
CASE
REPORT: Seven young female workers visited the Department of Occupational and Environmental Medicine, complaining of cough, dyspnea, and chest discomfort that started within two days at work processing a touchscreen with ozone (0.103 ppm ozone detected in the their workplace). Other; symptoms observed included rhinorrhea, headaches, and dizziness. There was a temporary improvement in symptoms upon taking a day off, but their symptoms deteriorated upon continuing work again-suggesting the ozone exposure in their work environment was responsible for their symptoms. The results of pulmonary function and blood laboratory tests were normal; however, laryngoscopy and nasal endoscopy identified three cases of inflammation on laryngeal, intranasal, or vocal cord regions.
CONCLUSIONS
Based on the levels of ozone detected in the workplace and clinical symptoms presented, we conclude that the respiratory symptoms in these cases were caused by excessive ozone exposures.

Citations

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A Study of Ozone Variations in a Semiconductor Fabrication Facility and Office Related to the Ozone Concentration in the Outdoor Air
Ji-Eun Lee, Myung-Koo Jung, Kwang-Min Choi
Journal of Korean Society of Occupational and Environmental Hygiene.2016; 26(2): 188. CrossRef

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Original Article

Factors Affecting Dyspnea in Retired Coal Miners in Korea: Yong Hee Cheon, Sei Jin Chang, Bong Suk Cha; Korean Journal of Occupational and Environmental Medicine 2001;13(3):286-295. Published online September 30, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.3.286

Abstract PDF: OBJECTIVES
This study was done to examine the risk factors for the dyspnea of retired coal miners in Korea.
METHODS
Eight hundred and sixteen male workers who took the health examination for retired coal miners in the T hospital were recruited, in this study and their health examination records were employed to assess the risk factors for dyspnea. Both univariate and multiple logistic regression analyses were used to estimate the relationship between known risk factors and the presence of dyspnea.
RESULTS
Variables in the univariate analysis, which showed a significant relationship with dyspnea were age(>or=60 years) (OR : 2.20, 95% CI : 1.63-3.00), work duration(>or=2 0 years) (OR : 1.67, 95% CI : 1.24-2.25), profusion of small opacity(>or=1/0) (OR : 1.81. 95% CI : 1.30-2.51), large opacity(>or=A) (OR : 2.19, 95% CI : 1.30-3.70), and the ratio of the distance between the start of the first division of the right and left main pulmonary arteries divided by the transverse diameter of the thorax (cor pulmonale index)(>or=0 . 3 6 ) (OR : 2.37, 95% CI : 1.77-3.17). The multivariate analysis using logistic regression analysis showed age(>or=60 years)(OR : 1.69, 95% CI : 1.28-2.21), smoking amount(>or=1 filters/day) (OR : 1.61, 95% CI : 1.06-2.45), no experience of having quit smoking (OR : 1.40 95% CI : 1.06-1.84), and the cor pulmonale index(>or=0.36)(OR : 1.75, 95% CI : 1.34-2.29) were associated with an increased risk for dyspnea.
CONCLUSIONS
These results suggests that the cor pulmonale index is the most significant risk factor in predicting dyspnea in retired coal miners. In addition, this study also revealed that workers aged 60 years or more or smokers were more likely to experience dyspnea as compared to those aged 60 years or less and nonsmokers.

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