The Maximum Breathing Capacity - Direct versus Ventilographic Methods.
NIOSH 1969 Mar:12 pages
Study of the ventilographic mechanism used to measures Maximum Breathing Capacity during gross spirometry reveals an error in measurement attributed to loss of recorded volume per excursion of the ventilographic pen, due to mechanical slippage in the mechanism. It is suggested that all investigators should calibrate their 13.5 liter Collins respirometers to determine if the degree of error is significant in each case.
NIOSH-Author; Analytical-methods; Respiratory-function-tests;
NIOSH, Cincinnati, Ohio, No. TR-65, 12 pages, 4 references