Articles Tập 67 Số CĐ15 25/09/2026

ASTHMA CONTROL ASSESSED BY IMPULSE OSCILLOMETRY IN CHILDREN AGED 4–6 YEARS OLD AT THE HANOI MEDICAL UNIVERSITY HOSPITAL

Mai Nguyet Ha, Nguyen Thi Dieu Thuy
DOI: 10.52163/yhc.v67iCD15.6831
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Abstract

Objective: To describe asthma control status as assessed by impulse oscillometry (IOS) in children aged between 4-6 years at Hanoi Medical University Hospital.

Methods: A prospective longitudinal descriptive study was conducted on 60 asthmatic children aged between 4-6 years who attended to the Department of Pediatrics, Hanoi Medical University Hospital, from July 2025 to May 2026.

Results: Among 60 asthmatic children assessed at the initial visit, 30 children had at one-month follow-up, and 15 children at three-month follow-up. The peripheral airway IOS parameters (R5–R20, AX, and Fres) showed statistically significant improvement after one month of treatment (p < 0.05). A significant correlation was observed between C-ACT scores and airway obstruction measured by IOS at on month follow-up, with all patients exhibiting elevated airway resistance classified as uncontrolled asthma by Childhood asthma control test (C-ACT) at both T0 and T1. Airway resistance was inversely correlated with C-ACT scores reflecting the degree of asthma control.

 Conclusion: IOS is an objective, non-invasive tool that supports monitoring of parameters reflecting peripheral airway function and assessing asthma control status, particularly in children under 6 years of age.

Keywords
Asthma, Impulse Oscillometry, Asthma control.
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