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J Appl Physiol 39: 315-317, 1975;
8750-7587/75 $5.00
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Journal of Applied Physiology, Vol 39, Issue 2 315-317, Copyright © 1975 by American Physiological Society

ARTICLES

Computerized method for analyzing maximum and partial expiratory flow-volume curves

R. J. Soto, H. V. Forster and B. Rasmussen

Computerized instrumentation and software have been developed to obtain maximum expiratory flow-volume (MEFV) and partial expiratory flow-volume (PEFV) curves. The computerized system calculates and prints out the flow at 25% and 40% of control vital capacity (VC), the expiratory volume, peak expiratory flow rate and expiratory volume at one second (FEV1) divided by VC, the latter expressed as a percent. The flow-volume curves can be displayed on an oscilloscope or plotter and stored on magnetic tape. A pilot study was completed to demonstrate the reliability and validity of the data obtained.




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