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. 1982 Feb;37(2):124–128. doi: 10.1136/thx.37.2.124

Factors influencing the bronchodilator effect of a deep inspiration in asthmatic patients with provoked bronchoconstriction.

A Beaupré, J Orehek
PMCID: PMC459262  PMID: 7080011

Abstract

We have studied 26 asthmatic patients in whom deep inspiration induced a transient but marked bronchodilatation when carbachol-induced bronchoconstriction was present. Changes in bronchial tone were assessed by specific airway resistance measurements. Bronchodilatation after a slow inspiration (eight subjects) or a 10-second breath-hold at total lung capacity (13 subjects) was significantly less than that observed after either a fast inspiration or no breath-holding period. The magnitude of the bronchodilatation induced by a fast inspiration without breath-holding was directly and significantly related to the magnitude of the carbachol-induced bronchoconstriction in five subjects.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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