Exercise-induced bronchospasm, a complementary tool on asthma evaluation
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Abstract
Introduction: Bronchial challenge with exercise is used to identify and characterize airway hyperresponsiveness. Bronchoconstriction induced by exercise can occur both on asthmatic and non-asthmatic infant patients. Objective: Characterization of Pediatric patients submitted to exercise challenge. Additionally, we tried to test whether the risk of exercise-induced bronchoconstriction in children increases if the patient has asthma or is obese. Methods: Retrospective study (2014-2019) of patients submitted to exercise challenge in a Pulmonary Department of a district hospital. Demographic and clinical data, allergic status, respiratory function, exercise challenge were collected and analyzed. The test was carried out on a treadmill, positive when falling > 10%. Results: Thirty-three patients were examined. 48% of patients were female. Mean age of 13,97 ± 4,48 years. Mean Body Mass Index of 20,2 kg/m2. The test was positive on 42% (n=14) and within these 9 had diagnosis of asthma and rhinitis, 4 of asthma and 1 rhinitis. For the patients with a positive result on the test, their mean body mass index was superior (21.57 kg / m2 against 20.22 kg / m2), however the difference had no statistically significance (p = 0,26). Conclusion: No significant difference occurred in exercise-induced bronchoconstriction between obese or non-obese children. Nevertheless, there was a difference in asthmatics and non-asthmatics patients. Most patients with positive result on the test were asthmatic. The author intends to demonstrate the importance of this test as a complementary tool on evaluating asthmatic patients.
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References
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