Abstract:
:We conducted a comparative study of pulmonary dysfunction among workers who were exposed to silica, asbestos, or coalmine dust. The results showed that all three groups of dust-exposed workers, even those without radiographic signs of pneumoconiosis, had decreased spirometric parameters and diffusing capacity (DLco) in both nonsmokers and smokers. Pulmonary function was further decreased when pneumoconioses were present in the three groups. In accord with increasing radiographic categories, pulmonary function in the workers with either silicosis or asbestosis was even lower, whereas in those with coal workers' pneumoconiosis (CWP), it changed relatively little. Workers with mild to moderate (radiographic category I-II) silicosis or asbestosis showed similarly decreased DLco, but those with silicosis showed lower FEV1/FVC than those with abestosis. The workers with CWP also showed a lower FEV1/FVC than those with asbestosis. The major impairment patterns for silica workers, asbestos workers, and coal miners were mixed, restrictive and mixed, and obstructive, respectively. Smoking obviously increased the prevalence of obstruction for all the groups. We conclude from the present study that all the three dusts cause functional abnormalities that precede radiographic changes of pneumoconiosis. We should pay more attention to respiratory impairment in the initial stage of silicosis and CWP.
journal_name
Am J Ind Medjournal_title
American journal of industrial medicineauthors
Wang X,Yano E,Nonaka K,Wang M,Wang Zdoi
10.1002/(sici)1097-0274(199705)31:5<495::aid-ajim2subject
Has Abstractpub_date
1997-05-01 00:00:00pages
495-502issue
5eissn
0271-3586issn
1097-0274pii
10.1002/(SICI)1097-0274(199705)31:5<495::AID-AJIM2journal_volume
31pub_type
杂志文章abstract::A one-year prospective survey was conducted to study the incidence of and potential risk factors for farm-related injuries in Eastern Ontario. One hundred and seventeen dairy and beef farms were surveyed using a personal interview. Information was collected on demographic characteristics of the farm owners, workers, a...
journal_title:American journal of industrial medicine
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pub_type: 杂志文章
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journal_title:American journal of industrial medicine
pub_type: 历史文章,杂志文章
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journal_title:American journal of industrial medicine
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journal_title:American journal of industrial medicine
pub_type: 杂志文章
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journal_title:American journal of industrial medicine
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更新日期:2014-07-01 00:00:00
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pub_type: 杂志文章,评审
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pub_type: 杂志文章
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更新日期:2016-06-01 00:00:00