Results 51 to 60 of about 4,255 (175)

Maximum expiratory flow changes induced by longitudinal tension on trachea in normal subjects

open access: yes, 1977
Maximal expiratory flow (Vmax) was noticed to increase in some subjects during neck hypertension. Maximal expiratory flow volume (MEFV) curves were obtained in 15 normal young subjects at regular and hyperextended neck posture.
C. G. Melissinos, J. Mead
core   +1 more source

Diagnostic Value of the Maximal Expiratory Flow–Volume Curve for Central Airway Obstruction

open access: yesInternational Journal of General Medicine
Yijing Feng, Xianglin Lian, Huanxia Wang, Jianan Chen, Jinyi Xu Department of Cardio-Pulmonary Function, Henan Provincial People’s Hospital, Zhengzhou University People’s Hospital, Zhengzhou, Henan, 450003, People’s Republic of ChinaCorrespondence: Jinyi
Feng Y, Lian X, Wang H, Chen J, Xu J
doaj  

Steady expiratory flow in dog lungs: an isovolume preparation

open access: yes, 1981
By supplying air and other gases through discs glued to the pleural surface, we studied steady expiratory flow at constant volume. Dog lungs were studied at constant PA - Ppl (alveolar minus pleural pressure) of 7 to 10 cmH2O, as increasing flow was ...
J. D. Brain, S. L. Sneddon
core   +1 more source

Eight-week of high-intensity running interval-training induce an improvement in maximal expiratory flow-volume curves in healthy prepubertal children

open access: yes, 2003
International audienceSeveral studies have shown that respiratory muscle strength may be improved by aquatic physical activities in adults. This fact seem to be involved in the alterations of airway resistance or maximal expiratory flow-volume in ...
Berthoin, Serge   +6 more
core  

Configuration of maximum expiratory flow-volume curve: model experiments with physiological implications

open access: yes, 1985
A two-compartment mechanical model of the lungs was constructed with two parallel peripheral and collapsible bronchi in series with one central and collapsible trachea.
O. F. Pedersen, R. H. Ingram
core   +1 more source

Age-related changes in the respiratory system [PDF]

open access: yes, 1999
This article summarises the main structural and physiological changes which take place in the lung from young adulthood to senescence. An understanding of these changes helps the clinician to correctly interpret some results of radiology and pulmonary ...
Ebejer, Martin J., Lesauskaite, Vita
core  

Ozone exposure decreases the effect of a deep inhalation on forced expiratory flow in normal subjects

open access: yes, 2004
Sixteen healthy nonsmoking subjects (7 women), 21-49 yr old, were exposed in a climate chamber to either clean air or 300 parts/billion ozone on 4 days for 5 h each day.
Pedersen, OF   +5 more
core   +1 more source

Determinants of maximal expiratory flow and density dependence in normal humans

open access: yes, 1980
There is a large variability in maximal expiratory flow (V) and density dependence (DD) in normal humans. Lung mechanics and flow-volume curves were obtained in 40 normal males while they breathed air or helium-oxygen (80%-20%). Static lung recoil (Pst)
J. R. Rodarte   +2 more
core   +1 more source

MOESM1 of Reference value for expiratory time constant calculated from the maximal expiratory flow-volume curve

open access: yes, 2019
Additional file 1: Figure S1. The relationship between RCEXP and maximal mid-expiratory flow rate (MMF). To a certain extent, RCEXP is sociated with MMF with an R2 value of 0.3154 (P < 0.001). There is a gradual increase in RCEXP, especially when MMF is below approximately 1.0 L/s. Figure S2.
Ikeda, Takamitsu   +5 more
openaire   +1 more source

Exercise response and the effect of supplemental oxygen during interval training on O2 uptake kinetics, blood lactate levels, and endurance performance in patients with mild, moderate and severe cystic fibrosis [PDF]

open access: yes, 2011
Background: Exercise performance is reduced in individuals with moderate to severe cystic fibrosis (CF). A ventilatory mechanical limitation, arterial hypoxemia, cardiovascular abnormalities, alteration in O2 uptake kinetics and reduced muscle ...
Reuveny, Ronen
core  

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