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Document ID (ISN)30582
CIS number 79-41
ISSN - Serial title 0003-0805 - American Review of Respiratory Disease
Year 1978
Convention or series no.
Author(s) Kryger M., Aldrich F., Reeves J.T., Grover R.F.
Title Diagnosis of airflow obstruction at high altitude.
Bibliographic information June 1978, Vol.118, No.6, p.1055-1058. Illus. 14 ref.
Abstract Many workers in the US mining industry work at high altitudes (>3,000m). A large molybdenum (hard rock) mine in Colorado (altitude 3,100m) instituted respiratory screening of all newly hired and current employees in 1976. Evaluations included a respiratory questionnaire, spirometry, and a chest X-ray. The authors evaluated all men screened between March 1976 and April 1977 (approximately 1,600 subjects) and then excluded all subjects who had smoked cigarettes, who had a history of lung disease, or whose present or previous job was in an environment of mineral dusts or chemical fumes, leaving 126 nonsmokers believed to be free of lung disease. The authors conclude from the results of measurements (FVC; FEV1; FEV1/FVC, mean forced expiratory flow) that using predicted sea level values for spirometry done at high altitude, underestimation of airway obstruction may result, and established spirometric normal values for an altitude of 3,100m for white men.
Descriptors (primary) obstructive ventilatory impairment; respirable dust; mining industry; spirometry; high altitude
Descriptors (secondary) USA; smoking; diagnosis; atmospheric pressure; survey; respiratory function tests; normal values
Document type -
Subject(s) Dust, aerosols and related diseases
Broad subject area(s)
Browse category(ies) Diseases of the respiratory system (except for pneumoconiosis & similar)
Mining and quarrying
Hypobaric pressure