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탄광의 분진상태와 진폐증의 유병률에 대한 역학적 조사 '84
윤임중,임영,김영준 가톨릭대학 산업의학쎈타 산업의학연구소 1988 韓國의 産業醫學 Vol.27 No.1
To assess the dust concentration as well as total and respirable dust including free silica content and the prevalence of pnemoconiosis, this study was carried out on 24,000 under-ground workers who are employing at present in 52 collieries. For the radiological examination, the copacitor discharge type mass-survey X-ray used and X-ray from the rotating anode tube (500mA 55KVP) was applied at the distance of 1.5m. Two well-experienced specialists took part in the reading of chest X-ray films in this study. and the categories of pneumoconiosis was classified according to the ILO-U/c International Classification of Radiographs of Pneumoconiosis (ILO 1980). The dusts were sampled for six hours at working point. The Concentration of respirable dust and free silica in the total dust were measured using the piezoelectric microbalance and X-ray diffraction method each. The results were as follows: 1. Of the total subjects, coal face workers were 53.5%, while tunnel drillers and the other kind of underground work were 19.9% and 31.9%each. 2. According to the scale of coalmines and the kind of underground works, the range of free silica measurement was variable as well as 0.09-28.14% 3. The amount of total dust in collieries more than 500 employees was averagely 41.3 ±1.35mg/㎥, while the amount was averagely accounted 5.94 ±1.31mg/㎥ in collieries less than 500employees. There were some rock places which was in excess of threshold limit value. 4. The average amount of respirable dust was 2.12 ±0.87mg/㎥ in coal face more than 500 employees, while the amount was 3.15 ±0.98mg/㎥ in coal face less than 500 employees. the amount was in excess of threshold limit value according to the scale of collieries and the work place to be measured. 5. The prevalence of pneumoconiosis was 16.5% in the collieries less than 500 employees, while the prevalence was 12.8% in collieries more than 500 employees. The overall prevalence of Premoconiosis in the all subjects was 13.8%. 6. The Prevalence of Pneumoconiosis was significantly increased according to the years of underground work. 7. The prevalence of Pneumocomiosis was significantly higher in the high content class of free silica dust than in the low middle classes. 8. The progression from one subcategory to another of simple Pneumoconiosis took place at speed of approximately 0.7 years on an average. The occurance of the lower a 5 percentile of simple Pneumoconiosis stood at 9.2 years in category 0/1.
김영준,김경아,임영,윤임중 大韓産業醫學會 1990 대한직업환경의학회지 Vol.2 No.1
A 25 year old woman who suffered muscle pain on both lower extremities and dizziness had taken Chinese herb powder for two months to relieve symptoms. We had carried out cell blood counts including basophilic stippling of red cells, and analyzed the blood lead, urine lead, urine α-aminolevulinic acid and urine coproporphyrine. By the reference of these laboratory findings, clinical manifestations such as severe anemia and lead line on gingiva, she was diagnosed lead poisoning. The chinese herb powder which she had ingested daily a pack weighted 750mg had contained 5mg lead corresponding 7.6% per a pack. After administration of D-penicillamine as a chelating agent for two months, the aboved clinical manifestations and laboratory findings were markedly improved and the therapy are still continued.