Differential diagnosis of ventilatory disorders with the help of volume/flow diagram.
Volume/flow (V/v) diagrams obtained from 82 healthy and pulmonary diseased subjects were analyzed. A formula had been worked out on the basis of determined slow vital capacity, for the calculation of maximum forced expiratory flow (VEmax). The expiratory volume/flow curves were used for the computation of lung conpliance (C1). These calculated values of VEmax and C1 were highly correlated to the measured values. It is concluded that these calculated values would provide a good index for the preliminary differential diagnosis of the pulmonary disorders.
D000403:Airway Resistance; D002986:Clinical Trials as Topic; D003937:Diagnosis, Differential; D006801:Humans; D008170:Lung Compliance; D008448:Maximal Expiratory Flow Rate; D008875:Middle Aged; D012123:Pulmonary Ventilation; D012140:Respiratory Tract Diseases / Q000175:diagnosis*; D013147:Spirometry; D013990:Tidal Volume; D014797:Vital Capacity