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

J Varga, R Casaburi, S Ma, A Hecht, D Hsia… - Respiratory physiology …, 2016 - Elsevier
… increase intrathoracic pressure yielding concavity in the expiratory flow-volume loop in
COPD. We investigated the relationship between this concavity and dynamic hyperinflation (DH). …

Oscillatory behaviour of compressible hyperelastic shells subjected to dynamic inflation: a numerical study

D Aranda-Iglesias, G Vadillo, JA Rodríguez-Martínez - Acta Mechanica, 2017 - Springer
… The ˆPh − ν curve shows a power-type concave-up shape with a slope that increases as the
Poisson’… The role of constitutive relation in the stability of hyper-elastic spherical membranes …

Flow limitation and dynamic hyperinflation: key concepts in modern respiratory physiology

PMA Calverley, NG Koulouris - European Respiratory Journal, 2005 - Eur Respiratory Soc
… ratio reflects a curve with an upward concavity with little expiratory flow reserve over the …
the pressure–volume relationship and avoid the flatter upper part of this relationship, where any …

Effect of hyperinflation on the diaphragm

A De Troyer - European Respiratory Journal, 1997 - Eur Respiratory Soc
… as a pressure generator is primarily determined by the length-tension relationship. This …
hyperinflation, the normal curvature of the diaphragm is even reversed at TLC, with its concavity

Developing a new marker of dynamic hyperinflation in patients with obstructive airway disease-an observational study

ML Chuang, MJ Hsieh, TC Wu, IF Lin - Scientific reports, 2019 - nature.com
… in correlation with static air trapping or lung hyperinflation in … new marker of dynamic
hyperinflation to replace dynamic IC … curve of spirometry revealed typical concavity 13 , and their …

Mechanisms to dyspnoea and dynamic hyperinflation related exercise intolerance in COPD

J Varga - Acta Physiologica Hungarica, 2015 - akjournals.com
… airway compression can be detected with a concave shape change manifestation (RAR <
… can improve exercise tolerance in relation with reduction in dynamic hyperinflation (1, 6). An …

Cardiovascular effects of exercise induced dynamic hyperinflation in COPD patients—Dynamically hyperinflated and non-hyperinflated subgroups

J Lukacsovits, G Szollosi, JT Varga - PLoS One, 2023 - journals.plos.org
… An IC manoeuvres were performed during each level of load to detect the presence of
dynamic hyperinflation. The presence of dynamic hyperinflation was defined by a 5% and at least …

Inflation via gravitino condensation in dynamically broken supergravity

J Alexandre, N Houston… - International Journal of …, 2015 - World Scientific
… the usual relations among the slow-roll inflationary parameters2 … of dynamically broken
SUGRA, will be discussed here. … gravitino condensate must be locally concave about the origin. …

A dynamic measure of inflation

R Reis - 2005 - nber.org
… , asset prices affect dynamic inflation but not static inflation. If … of its arguments, overall concave,
unbounded above and below… The serial correlation of dynamic inflation is 0.10, while that …

Mind the output gap: the disconnect of growth and inflation during recessions and convex Phillips curves in the euro area

M Gross, W Semmler - Oxford Bulletin of Economics and …, 2019 - Wiley Online Library
… dependence on the measure of slack directly, just as the capacity constraint model, yet of
the opposite shape; it implies concavity in the relation between inflation and economic slack. …