Computerized method for analyzing maximum and partial expiratory flow-volume curves.
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.
D003201:Computers; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology; D008176:Lung Volume Measurements / Q000379:methods*; D013147:Spirometry