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Glottis opening and airway resistance

Glottis opening and airway resistance airway resistance DAN C. STiiNESCU, J. PATTIJN, Laboratorium voor Longfunktieonderzoek, J. CLEMENT, K. P. VAN DE WOESTIJNE Akademisch Ziekenhuis St. Rafael, Leuven, Belgium K. P. VAN J. Appl. Physiol. 1972.-In five healthy volunteers, seated in a 32 (4) : 460-466. body plethysmograph, the orifice was observed photographed through indirect laryngoscopy during continuous slow expirations at different lung volumes. A positive significant correlation was observed between , lung volume, flow rate. The variation of the with volume was larger for continuous expiration, yet, the was wider during at all lung volumes. The latter observation explains why, at comparable lung volumes, airway resistance is lower than the resistance calculated from the slope of the initial part of isovolume pressure-flow curves. At FRC level, the aperture increased with volume. However, airway resistance measured in the same conditions demonstrated, on the average, an increase with volume or airflow. As compared to tidal breathing, the was larger during the differences between inspiration expiration were smaller. We conclude that is a suitable method for measuring resistance if one wants to minimize the influence of the . airway resistance. ST NESCU, DE WOMTIJNE. DAN C., J. PATTIJN, J. CLEMENT, TECHNIQUE PULMONARY OR AIRWAY RESISTANCE is http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Physiology The American Physiological Society

Glottis opening and airway resistance

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Publisher
The American Physiological Society
Copyright
Copyright © 1972 the American Physiological Society
ISSN
8750-7587
eISSN
1522-1601
Publisher site
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Abstract

airway resistance DAN C. STiiNESCU, J. PATTIJN, Laboratorium voor Longfunktieonderzoek, J. CLEMENT, K. P. VAN DE WOESTIJNE Akademisch Ziekenhuis St. Rafael, Leuven, Belgium K. P. VAN J. Appl. Physiol. 1972.-In five healthy volunteers, seated in a 32 (4) : 460-466. body plethysmograph, the orifice was observed photographed through indirect laryngoscopy during continuous slow expirations at different lung volumes. A positive significant correlation was observed between , lung volume, flow rate. The variation of the with volume was larger for continuous expiration, yet, the was wider during at all lung volumes. The latter observation explains why, at comparable lung volumes, airway resistance is lower than the resistance calculated from the slope of the initial part of isovolume pressure-flow curves. At FRC level, the aperture increased with volume. However, airway resistance measured in the same conditions demonstrated, on the average, an increase with volume or airflow. As compared to tidal breathing, the was larger during the differences between inspiration expiration were smaller. We conclude that is a suitable method for measuring resistance if one wants to minimize the influence of the . airway resistance. ST NESCU, DE WOMTIJNE. DAN C., J. PATTIJN, J. CLEMENT, TECHNIQUE PULMONARY OR AIRWAY RESISTANCE is

Journal

Journal of Applied Physiology – The American Physiological Society

Published: Apr 1, 1972

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