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Case Report
A case of syncope in a villager with hypertrophic cardiomyopathy after hydrogen sulfide exposure by an unauthorized discharge of wastewater
Hyeonjun Kim, Seunghyeon Cho, Inho Jung, Sunjin Jung, Won-Ju Park
Ann Occup Environ Med 2023;35:e34.   Published online August 21, 2023
DOI: https://doi.org/10.35371/aoem.2023.35.e34
AbstractAbstract AbstractAbstract in Korean PDFPubReaderePub
Background

Hydrogen sulfide is a toxic substance that humans can be exposed to occupationally, and cases of hydrogen sulfide poisoning of workers in industrial sites are commonly reported. However, there have been no cases of poisoning of the public due to an unauthorized discharge of wastewater, so it is important to describe this incident.

Case presentation

In a small village in Jeollanam-do, Republic of Korea, accounts of a terrible stench had been reported. A 26-year-old man who lived and worked in a foul-smelling area was taken to the emergency room with a headache, dizziness, nausea, and repeated syncope. A subsequent police and Ministry of Environment investigation determined that the cause of the stench was the unauthorized discharge of 9 tons of wastewater containing hydrogen sulfide through a stormwater pipe while the villagers were sleeping. The patient had no previous medical history or experience of symptoms. Leukocytes and cardiac markers were elevated, an electrocardiogram indicated biatrial enlargement, left ventricular hypertrophy, and corrected QT interval prolongation. Myocardial hypertrophy was detected on a chest computed tomography scan, and hypertrophic cardiomyopathy was confirmed on echocardiography. After hospitalization, cardiac marker concentrations declined, symptoms improved, and the patient was discharged after 7 days of hospitalization. There was no recurrence of symptoms after discharge.

Conclusions

We suspect that previously unrecognized heart disease manifested or was aggravated in this patient due to exposure to hydrogen sulfide. Attention should be paid to the possibility of unauthorized discharge of hydrogen sulfide, etc., in occasional local incidents and damage to public health. In the event of such an accident, it is necessary to have government guidelines in place to investigate health impact and follow-up clinical management of exposed residents.

무단 방류된 황화수소 노출에 의해 비후성심근증이 악화되어 실신한 마을 주민 사례
배경
황화수소 중독은 산업현장, 하수처리시설 또는 관리되지 않는 화장실 등에서 흔하게 보고된다. 다만 폐수 무단 방류로 인해 일반 주민에게 건강 영향이 발생한 사례는 보고된 바 없어 이를 보고한다.
증례
전라남도 한 지역에서 새벽부터 심한 악취가 난다는 주민 신고가 다수 발생하였다. 경찰과 환경청의 조사 결과 악취의 원인은 새벽에 주민들이 잠든 사이 폐수처리업체에서 황화수소가 포함된 폐수 9톤을 우수관을 통해 무단으로 방류한 것으로 밝혀졌다. 심한 악취가 나는 지역에서 장시간 활동했던 26살 남성이 두통, 어지럼증, 메스꺼움과 짧은 실신을 반복하여 119를 통해 응급실로 내원하였다. 환자는 과거에 특별한 병력이나 증상 경험은 없었다. 검사상 환자의 백혈구와 심장 표지자 수치가 상승되어 있었다. 심전도에서 양측 심방 확장, 좌심실 비대 및 QTc 연장이 관찰되었다. 흉부 컴퓨터 단층 촬영 상 심근비대 소견과 심장 초음파 검사 상 비후성심근증이 확인되었다. 입원하여 대증치료 후 심장 표지자 수치는 감소하였고, 증상은 호전되어 입원 7일 만에 퇴원하였다. 퇴원 이후 추적관찰 동안 특별한 증상은 재발하지 않았다.
결과
본 사례는 환자가 이전에 인지하지 못하고 증상도 없었던 비후성심근증이 황화수소 노출로 인해 급성 악화된 것으로 판단된다. 종종 발생하는 지역의 악취 사건에 황화수소가 무단 방류되었을 가능성을 고려해야 할 것이며, 향후 이러한 화학사고 발생 시 화학물질관리법에 따른 주민 건강영향조사를 실시하여 주민 건강을 관리해야 할 것이다.
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Research Article
Acute respiratory symptoms and evacuation-related behavior after exposure to chlorine gas leakage
Sung-Woo Han, Won-Jun Choi, Min-Kee Yi, Seng-Ho Song, Dong-Hoon Lee, Sang-Hwan Han
Ann Occup Environ Med 2016;28:29.   Published online July 4, 2016
DOI: https://doi.org/10.1186/s40557-016-0115-2
AbstractAbstract PDFPubReaderePub
Background

A study was performed on the accidental chlorine gas leakage that occurred in a factory of printed circuit boards manufactured without chlorine. Health examination was performed for all 52 workers suspected of exposure to chlorine gas, and their evacuation-related behaviors were observed in addition to analyzing the factors that affected the duration of their acute respiratory symptoms.

Methods

Behavioral characteristics during the incidence of the accidental chlorine gas leakage, the estimated time of exposure, and the duration of subjective acute respiratory symptoms were investigated. In addition, clinical examination, chest radiography, and dental erosion test were performed. As variables that affected the duration of respiratory symptoms, dose group, body weight, age, sex, smoking, work period, and wearing a protective gear were included and analyzed by using the Cox proportional hazard model.

Results

Of 47 workers exposed to chlorine gas, 36 (77 %) developed more than one subjective symptom. The duration of the subjective symptoms according to exposure level significantly differed, with a median of 1 day (range, 0–5 days) in the low-exposure group and 2 days (range, 0–25 days) in the high-exposure group. Among the variables that affected the duration of the acute respiratory symptoms, which were analyzed by using the Cox proportional hazard model, only exposure level was significant (hazard ratio 2.087, 95 % CI = 1.119, 3.890). Regarding the evacuation-related behaviors, 22 workers (47 %) voluntarily evacuated to a safety zone immediately after recognizing the accidental exposure, but 25 workers (43 %) delayed evacuation until the start of mandatory evacuation (min 5, max 25 min).

Conclusions

The duration of the subjective acute respiratory symptoms significantly differed between the low- and high-exposure groups. Among the 27 workers in the high-exposure group, 17 misjudged the toxicity after being aware of the gas leakage, which is a relatively high number.


Citations

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  • Migration behavior of chlorine and sulfur during gasification and combustion of biomass and coal
    Yuefeng Wang, Yuhong Qin, Stanislav V. Vassilev, Chong He, Christina G. Vassileva, Yuexing Wei
    Biomass and Bioenergy.2024; 182: 107080.     CrossRef
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    Journal of Hazardous Materials.2019; 377: 132.     CrossRef
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Case Report
Acute health effects of accidental chlorine gas exposure
Joo-An Kim, Seong-Yong Yoon, Seong-Yong Cho, Jin-Hyun Yu, Hwa-Sung Kim, Gune-Il Lim, Jin-Seok Kim
Ann Occup Environ Med 2014;26:29-29.   Published online October 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0029-9
AbstractAbstract PDFPubReaderePub
Objectives

This study was conducted to report the course of an accidental release of chlorine gas that occurred in a factory in Gumi-si, South Korea, on March 5, 2013. We describe the analysis results of 2 patients hospitalized because of chlorine-induced acute health problems, as well as the clinical features of 209 non-hospitalized patients.

Methods

We analyzed the medical records of the 2 hospitalized patients admitted to the hospital, as well as the medical records and self-report questionnaires of 209 non-hospitalized patients completed during outpatient treatment.

Results

Immediately after the exposure, the 2 hospitalized patients developed acute asthma-like symptoms such as cough and dyspnea, and showed restrictive and combined pattern ventilatory defects on the pulmonary function test. The case 1 showed asthma-like symptoms over six months and diurnal variability in peak expiratory flow rate was 56.7%. In case 2, his FEV1 after treatment (93%) increased by 25% compared to initial FEV1 (68%). Both cases were diagnosed as chlorine-induced reactive airways dysfunction syndrome (RADS) on the basis of these clinical features. The most frequent chief complaints of the 209 non-hospitalized patients were headache (22.7%), followed by eye irritation (18.2%), nausea (11.2%), and sore throat (10.8%), with asymptomatic patients accounting for 36.5%. The multiple-response analysis of individual symptom revealed headache (42.4%) to be the most frequent symptom, followed by eye irritation (30.5%), sore throat (30.0%), cough (29.6%), nausea (27.6%), and dizziness (27.3%).

Conclusions

The 2 patients hospitalized after exposure to chlorine gas at the leakage site showed a clinical course corresponding to RADS. All of the 209 non-hospitalized patients only complained of symptoms of the upper airways and mucous membrane irritation.


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Research Article
Acute Symptoms in Firefighters who Participated in Collection Work after the Community Hydrogen Fluoride Spill Accident
Seong-Yong Cho, Kuck-Hyun Woo, Jin-Seok Kim, Seong-Yong Yoon, Joo-Yong Na, Jin-Hyun Yu, Yong-Bae Kim
Ann Occup Environ Med 2013;25:36-36.   Published online November 28, 2013
DOI: https://doi.org/10.1186/2052-4374-25-36
AbstractAbstract PDFPubReaderePub
Objectives

This study aimed to analyze the relationship between clinical status and work characteristics of firefighters and other public officers who engaged on collection duties in the site of the hydrogen fluoride spill that occurred on September 27, 2012, in Gumi City, South Korea.

Methods

We investigated the clinical status, personal history, and work characteristics of the study subjects and performed physical examination and several clinical examinations, including chest radiography, echocardiography, pulmonary function test, and blood testing in 348 firefighters, police officers, volunteer firefighters, and special warfare reserved force who worked at the hydrogen fluoride spill area.

Results

The subjects who worked near the accident site more frequently experienced eye symptoms (p = 0.026), cough (p = 0.017), and headache (p = 0.003) than the subjects who worked farther from the accident site. The longer the working hours at the accident area, the more frequently the subjects experienced pulmonary (p = 0.027), sputum (p = 0.043), and vomiting symptoms (p = 0.003). The subjects who did not wear respiratory protective devices more frequently experienced dyspnea than those who wore respiratory protective devices (p = 0.013). In the pulmonary function test, the subjects who worked near the accident site had a higher decease in forced vital capacity than the subjects who worked farther from the site (p = 0.019); however, no statistical association was found between serum calcium/phosphate level, echocardiography result, chest radiographic result, and probation work characteristics.

Conclusions

The subjects who worked near the site of the hydrogen fluoride spill, worked for an extended period, or worked without wearing respiratory protective devices more frequently experienced upper/lower respiratory, gastrointestinal, and neurological symptoms. Further follow-up examination is needed for the workers who were exposed to hydrogen fluoride during their collection duties in the chemical plant in Gumi City.


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Research Article
Acute Symptoms after a Community Hydrogen Fluoride Spill
Joo-Yong Na, Kuck-Hyun Woo, Seong-Yong Yoon, Seong-Yong Cho, In-Ung Song, Joo-An Kim, Jin-Seok Kim
Ann Occup Environ Med 2013;25:17-17.   Published online September 19, 2013
DOI: https://doi.org/10.1186/2052-4374-25-17
AbstractAbstract PDFPubReaderePub
Objectives

This study was conducted to describe the demographic characteristics, and clinical signs and symptoms of patients who visited a general hospital because of the release of chemically hazardous hydrogen fluoride that occurred on September 27, 2012 in Gumi City, Korea.

Methods

The medical records at 1 general hospital 9 km from the accident site were reviewed using a standardized survey format. There were 1,890 non-hospitalized and 12 hospitalized patients exposed to hydrogen fluoride between September 27 and October 13 2012.

Results

Among the 12 hospitalized patients, 11 were discharged within 1 week and the other was hospitalized for 10 days. The chief complaints were respiratory symptoms such as hemoptysis and shortness of breath, gastrointestinal symptoms, neurologic symptoms, sore throat, and lip burn.

The number of non-hospitalized patients exhibited a bimodal distribution, peaking on the first and twelfth days after the accident. Their chief complaints were sore throat (24.1%), headache (19.1%), cough (13.1%), and eye irritation (9.2%); some patients were asymptomatic (6.2%). Patients who visited the hospital within 3 days (early patients) of the spill more often had shortness of breath (27.0%) and nausea (6.3%) as the chief complaints than patients who visited after 3 days (late patients) (3.5% and 2.6%, respectively). However, cough and rhinorrhea were more common in the late patients (14.0% and 3.3%, respectively) than in the early patients (5.0% and 0.0%, respectively). Patients who were closer to the accident site more often had shortness of breath and sputum as the chief complaints than patients who were farther away. The mean serum calcium concentration was 9.37 mg/dL (range: 8.4–11.0 mg/dL); none of the patients had a decreased serum calcium level. Among 48 pulmonary function test results, 4 showed decreased lung function. None of the patients had abnormal urine fluoride levels on the eighth day after exposure.

Conclusions

Patients hospitalized due to chemical hazard release of hydrogen fluoride had acute respiratory, gastrointestinal, and neurologic health problems. Non-hospitalized patients have acute symptoms mainly related to upper respiratory irritation.


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