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Query: UMLS:C0032273 (pneumoconiosis)
 1,578 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

An epidemiologic research together with a study on the environmental pollution were carried out in order to evaluate the risk of chronic respiratory diseases of blast furnace workers. The environment study was performed mainly using personal samplers given to workers with different jobs. Observations on 222 work shifts have shown that the total dust concentration to which cast workmen, maintenance men and blast furnace service men were exposed, marginally exceed the TLV values. Furthermore the level of respirable dusts for blast furnace service men was found slightly excessive. The average SO2 concentration was largely below the TLV values. However this gas could be found in excess for very short periods during the work. The epidemiologic study, conducted on a cohort of blast furnace area workers against a control group cohort, indicated a moderate prevalence of pneumoconiosis and chronic bronchitis amongst blast furnaces workers. The clinic and radiological pictures do not seem to go beyond the initial stages.
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PMID:[Atmospheric pollution and chronic respiratory diseases in the blast-furnace areas of iron-works]. 60 18

Two hundred and sixty seven workers employed in the manufacture of silicon carbide (SiC) were examined to determine the effects of exposure to contaminants (SiC, quartz, and SO2) in the workplace on pulmonary function. No exposure concentrations exceeded the current permissible limits. Ten subjects (3.7%) showed rounded opacities (profusion greater than or equal to 1/0). Two subjects employed only in the final stages of the production process and not exposed to crystalline silica showed opacities (profusion q1/0 and q2/1) on x ray film suggesting a role of SiC in the genesis of interstitial lung disease. Chest abnormalities on x ray film were correlated with cumulative exposure to dust and pulmonary function was affected by cumulative dust exposure, profusion of opacities, and smoking. It is concluded that the current standards do not provide adequate protection against pneumoconiosis and chronic pulmonary disease in this industry.
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PMID:Pulmonary impairment in workers exposed to silicon carbide. 163 8

A research study was carried out at a pyrite mine in Niccioleta, southern Tuscany, during the period 1980-1983 to investigate the possible effects of gaseous and particulate pollutants on the respiratory function of mine workers. The study was undertaken to fill the gap in recent scientific information in this field and also collect data which could be used for future planning of epidemiological and environmental controls at the mine. For the most exposed underground workers a dust exposure of 1.04 mg/m3 of inhalable dust and 0.60 mg/m3 of respirable dust was found. The average quartz content was less than 1.5% in both types of dust. Median exposures of the most exposed risk group were 6.0 ppm for carbon monoxide (CO), 0.22 ppm for nitrogen dioxide (NO2), 0.09 ppm for sulfur dioxide (SO2). The health effects of gaseous and particulate pollutants were studied by comparing the respiratory symptoms and lung function data of the miners with those of a reference group. A significantly increased prevalence of simple chronic bronchitis was found among underground miners when compared to the reference group. This condition was not associated with functional impairment of obstructive nature. Chest x-rays revealed 14 cases of p type pneumoconiosis.
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PMID:Respiratory disorders and lung function impairment in pyrite miners. 263 Aug 94