NIOSHTIC-2 Publications Search
The Index of Alveolar Ventilation (IAV): Algebraic versus Semi- graphical Method.
Consumer Protection and Environmental Health Service, Public Health Service, U.S. Department of Health, Education, and Welfare, Report No. TR-59, 1969 Mar:8 pages
The acceptability of the semigraphical method as a substitute for the algebraic method of calculating the index of alveolar ventilation (IAV), as proposed by Lichtneckert, was confirmed by clinical data from 302 tests on 151 subjects. It was noted that variability within the last portion of the washout (region of 5 to 2 percent) of the nitrogen (7727379) multiple breath test significantly affected the IAV value, but this effect did not invalidate the proposed method.
Methodology; Evaluations; Correlations; Pneumoconiosis; Respiration; Diagnosis; Prognoses; Pulmonary-function;
Consumer Protection and Environmental Health Service, Public Health Service, U.S. Department of Health, Education, and Welfare, Report No. TR-59, 8 pages, 6 references
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division