Bronchodilator response in wheezing infants assessed by the raised volume rapid thoracic compression technique

Bronchodilator response in wheezing infants assessed by the raised volume rapid thoracic compression technique

Author Lanza, Fernanda Cordoba Autor UNIFESP Google Scholar
Wandalsen, Gustavo Falbo Autor UNIFESP Google Scholar
Dos Santos, Amelia Miyashiro Autor UNIFESP Google Scholar
Solé, Dirceu Autor UNIFESP Google Scholar
Abstract Background: Bronchodilator response (BDR) analyzed by the raised volume rapid thoracic compression (RVRTC) in wheezing infants is not yet well described, although bronchodilators (BD) are routine in the treatment of this population. Objective: To evaluate BDR by RVRTC technique in infants with recurrent wheezing and compare to control group. Method: Cross sectional study, 45 infants, age 56 weeks (38-67 weeks). Two groups: wheezing group (WG: history of recurrent wheezing) and control group (CG). RVRTC was evaluated, FVC, FEV0.5, FEF50, FEF75, FEF85, FEF25-75 were measured. Salbutamol was delivered to infants and RVRTC evaluated again. BDR was determined by the increase greater than two standard deviation from the mean change in the CG. Results: In WG (n = 32) lung function was worse than in CG (n = 13): FEV0.5: 0.0(-0.9-0.9z score) vs 0.8(0.2-1.4z score)

FEF50: 0.2(-0.3-1.1z score) vs 0.9(0.5-1.4z score)

and FEF25-75: 0.2(-0.5-1.1z score) vs 1.1(0.6-1.6z score), respectively, p < 0.05. Both groups had similar increase after BD. In WG 11 patients (34%) were responder and these had worse lung function compared to nonresponder (n = 21) (p < 0.05). The increase in lung function after BD in responder was higher than in nonresponder: FEV0.5: 6.5(2.1-7.1%) vs -0.5(-2.5-0.7%), FEF50: 5.1(2.7-11.7%) vs 0.4(-1.1-2.8%), FEF75: 20.7(4.7-23.6%) vs -1.3(-6.4-3.9%), FEF25-75: 9.9(3.8-16.4%) vs 0.0(-1.5-1.0%), respectively, p < 0.05. Conclusion: 34% WG showed BDR measured by the RVRTC. The best variables to detect BDR were FEF75, FEF25-75 and FEV0.5. Patients with worse lung function showed better response to BD. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords Lung function
xmlui.dri2xhtml.METS-1.0.item-coverage London
Language English
Date 2016
Published in Respiratory Medicine. London, v. 119, p. 29-34, 2016.
ISSN 0954-6111 (Sherpa/Romeo, impact factor)
Publisher W B Saunders Co Ltd
Extent 29-34
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000385321200006

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