The bronchial response to mannitol is attenuated by a previous methacholine test: but not vice versa.
Clin Exp Allergy
; 39(7): 966-71, 2009 Jul.
Article
em En
| MEDLINE
| ID: mdl-19489848
ABSTRACT
AIM:
To examine the airway response to inhaled mannitol performed before or after a methacholine challenge test in a group of asthmatics with different levels of disease.METHODS:
A total of 48 asthmatics, 18-73 years of age, were included in the study. Two pairs of challenges were performed in a random order on two separate days > or =24 h apart either with mannitol performed first on day one, followed > or =1 h by methacholine, and methacholine as the first on day two, followed > or =1 h by mannitol or vice versa. A questionnaire-based interview was performed and lung function, exhaled nitric oxide, skin prick test, and blood eosinophil count were measured.RESULTS:
A total of 44% of the asthmatics used inhaled corticosteroids and 48% were atopic. The airway response to mannitol was attenuated when mannitol was given after methacholine, compared with the response to mannitol when it was given first [log response dose ratio (RDR) 1.42 vs. 1.60 (P=0.004)], whereas the response to methacholine was unchanged in the opposite test order [log RDR 0.81 vs. 0.96 (P=0.102)].CONCLUSION:
Bronchial challenges with inhaled mannitol and methacholine may be performed on the same day but provocation with mannitol should be performed before methacholine.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Asma
/
Brônquios
/
Testes de Provocação Brônquica
/
Cloreto de Metacolina
/
Hiper-Reatividade Brônquica
/
Manitol
Tipo de estudo:
Clinical_trials
/
Qualitative_research
Limite:
Adolescent
/
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Clin Exp Allergy
Ano de publicação:
2009
Tipo de documento:
Article