Distribution of ventilation and blood flow during exercise in emphysema.

Emmanuel, George; Moreno, Fátima

doi:10.1152/jappl.1966.21.5.1532

Cited by 12 publications

(4 citation statements)

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“…However, it has been repeatedly shown that during short-term exercise changes in lung volumes, such as functional residual capacity, are only slightly increased [29] or unchanged [8]. In this study Vtg was measured before and after exercise.…”

Section: Discussionmentioning

confidence: 94%

Airway Response in Asthmatic Children during and after Exercise

Mansfield¹,

McDonnell²,

Morgan³

et al. 1979

Respiration

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This study investigated the effect of moderate treadmill exercise on the airways of normal and asthmatic children using an effort-independent method (total respiratory resistance) as well as conventional pulmonary functions. Changes in total respiratory resistance (Rrs) were measured during and after exercise using a forced oscillation technique. Conventional spirometric (PEFR, FEV₁ and MMEF) and body plethysmographic measurements (Raw, Vtg) were also determined before and after exercise. A rapid, significant decrease in Rrs, suggesting bronchodilation during exercise, was observed in both groups tested, but this decrease was greater in normal children than in asthmatic patients. The bronchodilation persisted throughout the exercise period in both the asthmatic and the normal children. Increasing the length of the exercise from 10 to 20 min did not alter the degree or the duration of exercise-induced bronchodilation. In both normal children and patients with bronchial asthma, during moderate treadmill exercice, a significant, persistent bronchodilation can be detected. At the end of exercise, bronchoconstriction developed in asthmatic patients, while the values in normal subjects returned to their preexercise levels.

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Section: Discussionmentioning

confidence: 94%

Airway Response in Asthmatic Children during and after Exercise

Mansfield¹,

McDonnell²,

Morgan³

et al. 1979

Respiration

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“…The technique employed by Briscoe was based on analysis of nitrogen wash-out curves and division of the lung in chronic airways disease into a slow space (large volume, poorly ventilated, with low VA/C) and fast space (small volume, large ventilation with high JA/C)). Although this technique showed promise in distinguishing subgroups of chronic airways disease (Briscoe & Nash 1965, Emmanuel & Moreno 1966 other work failed to confirm this (Filley et al 1968). There is, moreover, a possibility that the abnormal nitrogen wash-out curve can be explained by series rather than parallel inhomogeneity (Cumming 1967).…”

Section: Measurement Of Ventilation-perfusion Distributionmentioning

confidence: 99%

Measurement of the Gas-Exchanging Function of the Lung

Moran¹

1973

Proceedings of the Royal Society of Medicine

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“…est variable, selon les types physio-patholo giques et selon les conditions expérimentales. Les résultats, en particulier ceux rapportés par Galy et al [2], Parumelle [3], Emma nuel et Moreno [4], Jones [5], Filley et al [6], Gonzales et al [7], Duffell et al [8] et Stanescu et al [9], traduisent, soit la stabi lité de Pa02 et de PaCO,, soit l'accroisse ment ou la réduction de l'hypoxémie, soit l'aggravation de l'hypoventilation alvéolaire. Par contre, rares sont les travaux concernant les liaisons entre les valeurs spirographiqucs et les valeurs hémorespiratoires déterminées au cours de l'exercice musculaire.…”

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Etude statistique des corrélations entre les critères spirographiques et les pressions partielles d’oxygène et d’anhydride carbonique dans le sang artériel

Neukirch¹,

Bréant²,

Mf³

et al. 1977

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PaO₂ and PaCO₂, after 5 min of a 40-Watt exercise, and spirometric data have been statistically evaluated in 152 patients with chronic obstructive bronchitis. In these patients, the hypoventilation syndrome increases during exercise. The correlation between age and PaO₂ is identical during rest and exercise, but the correlation between PaO₂ or PaCO₂ and FEv₁ (% predicted) is closer during exercise than during rest. The value 50 of the FEV₁ (% predicted) divides the patients into two groups: the patients who stay normocapnic and those who become hypercapnic or increase their hypercapnemia. These data show the interest of the FEV₁ (% predicted) values and allow to explain the evolution of the arterial blood gas tensions during exercise.

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Distribution of ventilation and blood flow during exercise in emphysema.

Cited by 12 publications

References 0 publications

Airway Response in Asthmatic Children during and after Exercise

Airway Response in Asthmatic Children during and after Exercise

Measurement of the Gas-Exchanging Function of the Lung

Etude statistique des corrélations entre les critères spirographiques et les pressions partielles d’oxygène et d’anhydride carbonique dans le sang artériel

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