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Chest, Vol 80, 870-873, Copyright © 1981 by American College of Chest Physicians

ARTICLES

Effects of drugs on mucociliary transport in the trachea and bronchial airways

DB Yeates, DM Spektor, GD Leikauf and BR Pitt

Pharmacologically active agents may change transport rates regionally within the airways of the lung, as well as affect the overall magnitude of the clearance of inhaled deposited radioaerosols. To investigate these possibilities the response of ethanol on pulmonary retention was determined and the responses of both the trachea and bronchial airways were measured after either oral administration of metaproterenol or inhalation of sulfuric acid mist. In the healthy nonchallenged lung, the velocity of mucociliary transport in the trachea was related to the percentage of activity cleared from the lung in two hours. Indices representing different portions of the pulmonary retention curve were also correlated. Changes in this interdependence of mucociliary transport within airways were produced by all agents. Metaproterenol increased tracheal mucus velocity but not lung clearance. Alcohol changed pulmonary retention in both magnitude and direction depending on the individual, resulting in an increase in variability of pulmonary mucociliary clearance between persons. Thus, to evaluate the effects of drugs or pollutants on the lower respiratory tract, measurements of mucociliary transport should be made in both the trachea and the bronchial airways.


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