Asthma and odors: the role of risk perception in asthma exacerbation.
Asthma and odors: the role of risk perception in asthma exacerbation.
复制标题
DOI：
10.1016/j.jpsychores.2014.07.002
复制
发表时间：
2014-10
影响因子：
4.7
通讯作者：
Dalton P
中科院分区：
文献类型：
--
作者：
Jaén C;Dalton P
Fragrances and strong odors have been characterized as putative triggers that may exacerbate asthma symptoms and many asthmatics readily avoid odors and fragranced products. However, the mechanism by which exposure to pure, non-irritating odorants can elicit an adverse reaction in asthmatic patients is still unclear and may involve both physiological and psychological processes. The aim of this study was to investigate how beliefs about an odors relationship to asthmatic symptoms could affect the physiological and psychological ‘ responses of asthmatics. Asthmatics classified as ‘moderate-persistent’, according to NIH criteria, were exposed for 15 mi to a fragrance which was described either as eliciting or alleviating asthma symptoms. During exposure, participants were asked to rate odor intensity, perceived irritation and subjective annoyance while physiological parameters such as electrocardiogram, respiratory rate, and end tidal carbon dioxide (etCO2) were recorded. Before, immediately after, and at 2 and 24 h post-exposure, participants were required to subjectively assess their asthma symptom status using a standardized questionnaire. We also measured asthma status at each of those time points using objective parameters of broncho-constriction (spirometry) and measures of airway inflammation (exhaled nitric oxide, FeNO). Predictably, manipulations of perceived risk altered both the quality ratings of the fragrance as well as the reported levels of asthma symptoms. Perceived risk also modulated the inflammatory airway response. Expectations elicited by smelling a perceived harmful odor may affect airway physiology and impact asthma exacerbations.
