Mannitol as a challenge test to identify exercise-induced bronchoconstriction in elite athletes

American Journal of Respiratory and Critical Care Medicine
K HolzerJo Douglass

Abstract

Bronchial provocation tests provide objective criteria for asthma and exercise-induced bronchoconstriction (EIB) and were recommended to justify the use of inhaled beta2-agonists by athletes at the Winter Olympics 2002. Eucapnic voluntary hyperpnea (EVH) was one test recommended to identify EIB. Provocation with EVH requires a special dry gas mixture limiting its availability. Provocation tests with osmotic aerosols require less expensive equipment that is easily portable. We assessed the sensitivity of a challenge with mannitol to identify responsiveness to EVH in 50 elite summer sport athletes who were unselected if they had respiratory symptoms. Asthma was previously diagnosed by a doctor in 27 subjects, and 21 subjects were currently under treatment for EIB or asthma. The mean predicted FEV1 was 103.6 +/- 10.8%, FVC was 99 +/- 13.3%, and mean forced expiratory flow during the middle half of the FVC was 104 +/- 22.7%. A total of 25 subjects were positive to EVH challenge (mean percentage of fall in FEV1 was 25.4 +/- 15% SD), and 26 subjects had a positive mannitol challenge (geometric mean [95% confidence interval] provoking dose causing a 10% fall in forced expiratory volume in one second [PD10] was 202 mg [134, 300], with ...Continue Reading

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Related Concepts

Bronchospasm, Exercise-Induced
(L)-Mannitol
Expiration, Function
Bronchial Provocation Tests
Bronchoconstriction
Mannitol
Signs and Symptoms, Respiratory
NEUROD1 wt Allele
Forced Expiratory Volume Procedure
Mutism

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