The Maximum Expiratory Flow-Volume Loop in Natives of Ladakh and Acclimatized Lowlanders

2005 ◽  
Vol 6 (3) ◽  
pp. 209-214 ◽  
Author(s):  
Chandrashekhar V. Apte ◽  
K. Sudhakar Rao
Keyword(s):  
Flow Volume ◽  
Flow Volume Loop ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow

Analysis of Maximum Expiratory Flow Volume Curves Using Canonical Correlation Analysis

1985 ◽  
Vol 24 (02) ◽  
pp. 91-100 ◽  
Author(s):  
W. van Pelt ◽  
Ph. H. Quanjer ◽  
M. E. Wise ◽  
E. van der Burg ◽  
R. van der Lende
Keyword(s):  
Correlation Analysis ◽  
Canonical Correlation Analysis ◽  
Canonical Correlation ◽  
Flow Volume ◽  
Non Linear ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow ◽  
Relationship Of ◽  
The Relationship ◽  
Age And Sex

SummaryAs part of a population study on chronic lung disease in the Netherlands, an investigation is made of the relationship of both age and sex with indices describing the maximum expiratory flow-volume (MEFV) curve. To determine the relationship, non-linear canonical correlation was used as realized in the computer program CANALS, a combination of ordinary canonical correlation analysis (CCA) and non-linear transformations of the variables. This method enhances the generality of the relationship to be found and has the advantage of showing the relative importance of categories or ranges within a variable with respect to that relationship. The above is exemplified by describing the relationship of age and sex with variables concerning respiratory symptoms and smoking habits. The analysis of age and sex with MEFV curve indices shows that non-linear canonical correlation analysis is an efficient tool in analysing size and shape of the MEFV curve and can be used to derive parameters concerning the whole curve.

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

Significance of Intraindividual Changes in Maximum Expiratory Flow Volume and Peak Expiratory Flow Measurements

CHEST Journal ◽  
1982 ◽  
Vol 81 (5) ◽  
pp. 566-570 ◽  
Author(s):  
Michael D. Lebowitz ◽  
Ronald J. Knudson ◽  
Greta Robertson ◽  
Benjamin Burrows
Keyword(s):  
Peak Expiratory Flow ◽  
Flow Volume ◽  
Flow Measurements ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow

Variability of the configuration of maximum expiratory flow-volume curves

1979 ◽  
Vol 46 (3) ◽  
pp. 565-570 ◽  
Author(s):  
Y. K. Tien ◽  
E. A. Elliott ◽  
J. Mead
Keyword(s):  
Normal Subjects ◽  
Flow Limitation ◽  
Residual Volume ◽  
Flow Volume ◽  
Maximum Difference ◽  
Slope Ratio ◽  
Computer Technique ◽  
Volume Increment ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow

With a computer technique variability of the configuration of maximum expiratory flow-volume (MEFV) curves was studied in terms of slope ratio, SR. SR = dV/dV divided by V/V, where V is the instantaneous flow and V is the volume increment above residual volume.) Approximately four SR-V curves, each based on three to five smoothed and averaged MEFV curves, were derived for each of 20 normal subjects (aged 23–55 yr) on a single occasion, and again at least 1 wk later. Individual curves were largely reproducible, the maximum difference in SR at most volumes being 0.3–1 U, but frequently showed substantial yet reproducible fluctuations with volume. These corresponeded to hitherto unrecognized irregularities of maximum expiratory flow that may reflect sudden changes in the location of flow limitation.

Relation of concavity in the expiratory flow-volume loop to dynamic hyperinflation during exercise in COPD

2016 ◽  
Vol 234 ◽  
pp. 79-84 ◽  
Author(s):  
Janos Varga ◽  
Richard Casaburi ◽  
Shuyi Ma ◽  
Ariel Hecht ◽  
David Hsia ◽  
...  
Keyword(s):  
Dynamic Hyperinflation ◽  
Flow Volume ◽  
Flow Volume Loop ◽  
Expiratory Flow

Maximum expiratory flow-volume curves and airway conductance in children and adolescents

1969 ◽  
Vol 26 (3) ◽  
pp. 308-316 ◽  
Author(s):  
A. Zapletal ◽  
E. K. Motoyama ◽  
K. P. Van De Woestijne ◽  
V. R. Hunt ◽  
A. Bouhuys
Keyword(s):  
Children And Adolescents ◽  
Flow Volume ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow ◽  
Airway Conductance

Discriminating Power of Measurements from Maximum Expiratory Flow-Volume Curves

Respiration ◽  
1986 ◽  
Vol 49 (4) ◽  
pp. 263-273 ◽  
Author(s):  
Osvaldo Marrero ◽  
Gerald J. Beck ◽  
Neil Schachter
Keyword(s):  
Flow Volume ◽  
Discriminating Power ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow
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