Intrasubject variability of maximal expiratory flow volume curve.

Intrasubject variability of maximal expiratory flow volume curve.

Analysis of airflow in the terminal portion of the maximal expiratory flow volume curve has been suggested as a useful test for the early diagnosis of chronic airways obstruction. Whether such an analysis can identify early disease, and whether any subsequent action can prevent the progress of chronic airways obstruction, is unknown and will require prospective studies. As a precursor of such a...

Spirometry: Quantification of the Shape of the Maximal Expiratory Flow-volume Curve

The relationship between Forced Expiratory Volume in one second (FEV1) and the Forced Vital Capacity (FVC) is intensively used in diagnosing because of its quantitative description with the index FEV1/FVC. There is not such index for the relationship between airflows (Peak Expiratory Flow (PEF) and Maximal Expiratory Flow at xx% of FVC (MEFxx, where xx=75, 50, 25%)). Our aim was to describe tha...

The maximal expiratory flow-volume curve in normal subjects in India.

Data on pulmonary function, with particular reference to flow-volumes, were obtained in 760 normal healthy Indians in Bombay, who had never smoked and who had no symptom or history of cardiorespiratory disease. Prediction equations were derived for spirometric parameters and for maximal expiratory flows. The maximal expiratory flow-volume curves showed considerable intersubject variability. Bot...

Maximal expiratory flow volume values evaluation among female quartz grinders

used test for serial distribution of airway obstruction [2] and in Background: A recent review in silica dust exposed diagnosing chronic obstructive workers focused on airway obstruction and the variables disease in surveys of air pollution used were forced vital capacity (FVC), FEV1 and FEV1%. etc. Tests of peak flow (PEF), MEFR Original Article Nellore Mohan Rao, Ramnath Takiar, Yashwant K. S...

Volume adjustment of maximal expiratory flow rates of flow-volume loops.