The Maximum Expiratory Flow-Volume Curve with Air and a Low-Density Gas Mixture

CHEST Journal ◽  
1981 ◽  
Vol 80 (1) ◽  
pp. 23-30 ◽  
Author(s):  
N. Berend ◽  
N.A. Nelson ◽  
J. Rutland ◽  
G.E. Marlin ◽  
Ann J. Woolcock
Keyword(s):  
Gas Mixture ◽  
Low Density ◽  
Flow Volume ◽  
Volume Curve ◽  
Maximum Expiratory Flow ◽  
Flow Volume Curve ◽  
Expiratory Flow

scholarly journals Longitudinal Examination of the Shape of the Maximum Expiratory Flow‐Volume Curve in Young Adults Following SARS‐CoV‐2 Infection

2021 ◽  
Vol 35 (S1) ◽  
Author(s):  
Jonathon Stickford ◽  
Marc Augenreich ◽  
Valesha Province ◽  
Nina Stute ◽  
Abigail Stickford ◽  
...  
Keyword(s):  
Young Adults ◽  
Flow Volume ◽  
Volume Curve ◽  
Maximum Expiratory Flow ◽  
Flow Volume Curve ◽  
Expiratory Flow ◽  
Longitudinal Examination

The Shape of the Maximum Expiratory Flow Volume Curve

CHEST Journal ◽  
1988 ◽  
Vol 94 (4) ◽  
pp. 799-806 ◽  
Author(s):  
Mary C. Kapp ◽  
E.Neil Schachter ◽  
Gerald J. Beck ◽  
Lucinda R. Maunder ◽  
Theodore J. Witek
Keyword(s):  
Flow Volume ◽  
Volume Curve ◽  
Maximum Expiratory Flow ◽  
Flow Volume Curve ◽  
Expiratory Flow

Maximum expiratory flow-volume curve: mathematical model and experimental results

1995 ◽  
Vol 17 (5) ◽  
pp. 332-336 ◽  
Author(s):  
S. Abboud ◽  
O. Barnea ◽  
A. Guber ◽  
N. Narkiss ◽  
I. Bruderman
Keyword(s):  
Mathematical Model ◽  
Experimental Results ◽  
Flow Volume ◽  
Volume Curve ◽  
Maximum Expiratory Flow ◽  
Flow Volume Curve ◽  
Expiratory Flow

AREA UNDER THE MAXIMUM EXPIRATORY FLOW-VOLUME CURVE: A MEASURE OF LUNG FUNCTION IN PRESCHOOL CHILDREN

CHEST Journal ◽  
2005 ◽  
Vol 128 (4) ◽  
pp. 187S
Author(s):  
Caroline Pesant ◽  
Miriam Santachi ◽  
Mario Geoffroy ◽  
Theophile Niyonsega ◽  
Mario E. Dumas ◽  
...  
Keyword(s):  
Preschool Children ◽  
Lung Function ◽  
Flow Volume ◽  
Volume Curve ◽  
Maximum Expiratory Flow ◽  
Flow Volume Curve ◽  
Expiratory Flow

Interdependence of regional expiratory flows limits alveolar pressure differences

1990 ◽  
Vol 69 (4) ◽  
pp. 1413-1418 ◽  
Author(s):  
G. P. Topulos ◽  
G. J. Nielan ◽  
G. M. Glass ◽  
J. J. Fredberg
Keyword(s):  
Strong Evidence ◽  
Transpulmonary Pressure ◽  
Flow Volume ◽  
Alveolar Pressure ◽  
Volume Curve ◽  
Regional Lung ◽  
Maximum Expiratory Flow ◽  
Flow Volume Curve ◽  
Expiratory Flow ◽  
Degree Of Heterogeneity

Wilson et al. (J. Appl. Physiol. 59:1924-28, 1985) have asserted that interdependence of regional expiratory flows could cause differences of interregional alveolar pressures to relax to time-independent limits during forced deflation. To test the hypothesis that such limiting differences do arise, we examined regional alveolar pressures during complete and partial maximally forced deflations of six excised canine lungs. Alveolar pressures were monitored using alveolar capsules on each of six lobes during forced deflations initiated at transpulmonary pressures of 30, 20, 15, and 10 cmH2O. In all lungs and in all maneuvers, interregional heterogeneity of alveolar pressure increased rapidly early in the deflation but much less so or not at all later in the deflation. When we compared complete with partial forced deflations, 16 of 24 maneuvers in six lungs showed clear evidence that as deflation progressed the degree of heterogeneity at isovolumic points became independent of the transpulmonary pressure from which the deflation was initiated. That is, alveolar pressures relaxed to limiting interregional differences that did not depend on time elapsed from the onset of the deflation. These data offer strong evidence of the existence of limiting differences. Such behavior implies that the sequence of regional emptying is controlled by a competition of opposing influences: nonuniformities of airway and parenchymal properties promoting nonuniformity of emptying vs. interdependence of regional expiratory flows promoting uniformity. As nonuniformity of regional pressures grows so do those factors that oppose that nonuniformity. These data underscore the insensitivity of maximum expiratory flow-volume curve configuration to the underlying inhomogeneous pattern of regional lung emptying.

scholarly journals Curvilinearity of a Maximum Expiratory Flow-Volume Curve: A Useful Indicator for Assessing Airway Obstruction in Children With Asthma

2019 ◽  
Vol 65 (4) ◽  
pp. 427-436 ◽  
Author(s):  
Yanli Zhang ◽  
Xiaorong Xiong ◽  
Fuli Dai ◽  
Aifang Su ◽  
Xiufang Wang ◽  
...  
Keyword(s):  
Airway Obstruction ◽  
Flow Volume ◽  
Volume Curve ◽  
Children With Asthma ◽  
Maximum Expiratory Flow ◽  
Flow Volume Curve ◽  
Expiratory Flow
Sign in / Sign up

Export Citation Format

Share Document