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Airways Obstruction From Asbestos Exposure: Categories
Each posteroanterior radiograph was scored for profusion category on the expanded ILO scale from 0/0 to 3/3. One experienced reader read all radiographs for consistency of interpretation. Periodically during the study, at intervals of 500 chest films, blinded sets of 100 chest films were reread for intrareader variation. Variation was confined to ILO profusion categories […]
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Airways Obstruction From Asbestos Exposure: History
One medical team gave questionnaires to these workers and did chest physical examinations, chest radiographs, spirometry, and measured alveolar carbon monoxide to validate smoking histories. The questionnaire was completed by trained interviewers. Occupational history included proximity to and duration of exposure to asbestos, medical, pulmonary, and cardiovascular histories, including criteria to define chronic bronchitis and […]
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Airways Obstruction From Asbestos Exposure: Methods
The men with asbestosis and the age-matched asbestos-exposed comparison men were from 8,720 workers studied at 47 sites across the United States from California to Florida. The asbestos exposed men (ILO profusion 0/0 and 0/1) were individually matched for age to men with asbestosis (ILO profusion 1 /0 to 3/3) in each smoking category using […]
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Airways Obstruction From Asbestos Exposure: Data
Another possibility, that volume has been replaced by fibrosis in normal-sized lungs, would increase the postmortem weight of lungs. Weight is not increased in asbestosis nor are alveoli filled by nonradiodense material as in alveolar lipoproteinosis. Alternately there would be “apparent restrictive impairment” if obstruction continued through advancement of asbestosis causing air trapping and progressive […]
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Airways Obstruction From Asbestos Exposure
Workers with clinical asbestosis have been characterized as having “restrictive” disease because of reduced vital capacity (VC) and in some cases reduced total lung capacity (TLC). This is thought to occur despite airway obstruction and increased TLC due to cigarette smoking. The TLC was decreased when functional residual capacities (FRC) were measured by gas dilution […]
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