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  • Title: Comparison of ultrasonically nebulized distilled water and hyperventilation with cold air in asthma.
    Author: Fabbri LM, Mapp CE, Hendrick DJ.
    Journal: Ann Allergy; 1984 Aug; 53(2):172-7. PubMed ID: 6465626.
    Abstract:
    To assess the potential value of brief non-pharmacologic challenge tests in the measurement of bronchial responsiveness and to investigate whether the responses are induced by similar mechanisms, we carried out comparative five-minute inhalation challenges with ultrasonically nebulized distilled water and cold air hyperventilation in nine asthmatic subjects. Decrements in FEV1 following both challenges were closely correlated (r = 0.885) and ranged from 8% to 59% of baseline following challenge with the former and from 6% to 59% following the latter. Each method was therefore equally effective in demonstrating bronchial hyperresponsiveness. Moreover, the strong correlation between the responses to both challenges coupled with previous observations suggests that the two stimuli may act by similar mechanisms.
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