1. Flow Volume Loop CHEST Volume 97, Issue 5, Pages 1270-1271 (May 1990)
Walter G. Vincken, M.D., Ph.D., F.C.C.P. 
CHEST 
Volume 97, Issue 5, Pages (May 1990)
DOI: /chest b
Copyright © 1990 The American College of Chest Physicians Terms and Conditions

2. Figure
Three MEFV curves, one with a straight descending limb (–) and two curves with opposite sigmoid descending limbs (—and -•-•-) have been superimposed. The three MEFV curves shown, although having widely different shapes, will yield the same value for angle β because they are determined by similar values for VC, PEF and FEF50. Expiratory flow (·ex) on the y-axis, volume (V) on the x-axis.
CHEST  , DOI: ( /chest b)
Copyright © 1990 The American College of Chest Physicians Terms and Conditions