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CLINICAL TRIAL
JOURNAL ARTICLE
Effect of extending the time after bronchodilator administration on identifying bronchodilator responsiveness in a pediatric pulmonary clinic.
Pediatric Pulmonology 2017 August
OBJECTIVES: American Thoracic Society/European Respiratory Society (ATS/ERS) spirometry interpretation guidelines recommend ≥15 min between pre- and post-bronchodilator testing to evaluate for a bronchodilator response. We aimed to lengthen the time between albuterol administration and post-bronchodilator testing to adhere to ATS/ERS guidelines and evaluated if lengthening this wait time would increase the percentage of patients classified as bronchodilator responsive.
METHODS: We compared the proportion of patients with a positive bronchodilator response between two groups of children with asthma, one group in which post-bronchodilator administration wait times were not standardized (pre-intervention) to another in which the wait time was extended to 15 min to adhere to ATS/ERS standards (post-intervention). We also determined the effect of this intervention on clinic appointment duration.
RESULTS: The analysis included 271 patients (145 pre-intervention and 126 post-intervention). The average wait time in the pre-intervention group was 6.5 ± 2.1 (mean ± SD) minutes compared to 16.2 ± 3.2 min (P < 0.001) post intervention, and clinic times increased from 83.0 ± 29.6 min to 91.7 ±22.5 min (P < 0.007) from the pre- to post-intervention group, respectively. In adjusted regression analysis, there was no significant change in FEV1 % predicted between the two groups.
CONCLUSIONS: In a busy pediatric pulmonary clinic, while we successfully lengthened time between albuterol administration and post-bronchodilator testing in the vast majority of patients, no difference was seen in the percentage of patients classified as bronchodilator responsive. Results from this study appear to question the ATS/ERS recommended 15 min post-bronchodilator administration wait time for children.
METHODS: We compared the proportion of patients with a positive bronchodilator response between two groups of children with asthma, one group in which post-bronchodilator administration wait times were not standardized (pre-intervention) to another in which the wait time was extended to 15 min to adhere to ATS/ERS standards (post-intervention). We also determined the effect of this intervention on clinic appointment duration.
RESULTS: The analysis included 271 patients (145 pre-intervention and 126 post-intervention). The average wait time in the pre-intervention group was 6.5 ± 2.1 (mean ± SD) minutes compared to 16.2 ± 3.2 min (P < 0.001) post intervention, and clinic times increased from 83.0 ± 29.6 min to 91.7 ±22.5 min (P < 0.007) from the pre- to post-intervention group, respectively. In adjusted regression analysis, there was no significant change in FEV1 % predicted between the two groups.
CONCLUSIONS: In a busy pediatric pulmonary clinic, while we successfully lengthened time between albuterol administration and post-bronchodilator testing in the vast majority of patients, no difference was seen in the percentage of patients classified as bronchodilator responsive. Results from this study appear to question the ATS/ERS recommended 15 min post-bronchodilator administration wait time for children.
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