CHANGES IN ARTERIAL OXYGEN-SATURATION IN PATIENTS WITH HYPER-REACTIVE AIRWAYS DURING A HISTAMINE INHALATION TEST

  • 1 January 1977
    • journal article
    • research article
    • Vol. 58  (1) , 1-4
Abstract
The arterial O2 saturation (SaO2) of 55 adult patients with hyperreactive airways was monitored with an 8-wavelength ear oximeter during a histamine inhalation test. The post-challenge fall (mean .+-. SD) in peak expiratory flow was 38 .+-. 15% of the baseline value; it was accompanied by a fall in SaO2 of 1.1 .+-. 1.8%, from 96.6 .+-. 1.8 to 95.5 .+-. 2.3%. In the histamine inhalation test used in this study, even the development of marked bronchoconstriction usually causes only slight changes in SaO2.

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