Forced Oscillation Technique As a Predictor for Loss of Control in Asthmatic Children
Overview
Authors
Affiliations
Background: A reliable objective tool using as a predictor of asthma control status could assist asthma management.
Objective: To find the parameters of forced oscillation technique (FOT) as predictors for the future loss of asthma symptom control.
Methods: Children with well-controlled asthma symptom, aged 6-12 years, were recruited for a 12-week prospective study. FOT and spirometer measures and their bronchodilator response were evaluated at baseline. The level of asthma symptom control was evaluated according to Global Initiative for Asthma.
Results: Among 68 recruited children, 41 children (60.3%) maintain their asthma control between 2 visits (group C-C), and 27 children (39.7%) lost their asthma control on the follow-up visit (group C-LC). Baseline FOT parameters, including the values of respiratory resistance at 5 Hz (R5), respiratory resistance at 20 Hz (R20), respiratory reactance at 5 Hz, area of reactance, %predicted of R5 and percentage of bronchodilator response (%∆) of R5 and R20 were significantly different between C-C and C-LC groups. In contrast, only %∆ of forced vital capacity, forced expiratory volume in 1 second (FEV), and FEF (forced expiratory flow 25%-75%) were significantly different between groups. Multiple logistic regression analysis revealed that %predicted of R5, %∆R5, %predicted of FEV and %∆FEV were the predictive factors for predicting the future loss of asthma control. The following cutoff values demonstrated the best sensitivity and specificity for predicting loss of asthma control: %predicted of R5=91.28, %∆R5=21.2, %predicted of FEV=89.5, and %∆FEV=7.8. The combination of these parameters predicted the risk of loss of asthma control with area under the curve of 0.924, accuracy of 83.8%.
Conclusion: Resistance FOT measures have an additive role to spirometric parameter in predicting future loss of asthma control.
[Research on portable airway impedance monitoring device based on expiratory oscillation].
Kuang Y, Che B, Li X, Liu L, Deng L Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2024; 41(3):430-438.
PMID: 38932527 PMC: 11208649. DOI: 10.7507/1001-5515.202309058.
Tanninen T, Pelkonen A, Malmberg L, Makela M J Allergy Clin Immunol Glob. 2024; 3(3):100268.
PMID: 38826625 PMC: 11141437. DOI: 10.1016/j.jacig.2024.100268.
Lin L, Chang Y, Yang K, Lin C, Chien J, Kao J Front Pediatr. 2022; 10:877681.
PMID: 35783300 PMC: 9247317. DOI: 10.3389/fped.2022.877681.
Chang Y Asia Pac Allergy. 2020; 10(1):e10.
PMID: 32099832 PMC: 7016318. DOI: 10.5415/apallergy.2020.10.e10.