DSpace Fukushima Medical University

福島県立医科大学学術成果リポジトリ = Fukushima Medical University Repository >
福島医学会 = The Fukushima Society of Medical Science >
Fukushima Journal of Medical Science >
Vol.66 (2020) >

Please use this identifier to cite or link to this item: http://ir.fmu.ac.jp/dspace/handle/123456789/1322

Files in This Item:

File Description SizeFormat
FksmJMedSci_66_p78.pdf881.61 kBAdobe PDFDownload
Title: Exhaled carbon monoxide levels in infants and toddlers with episodic asthma
Authors: Ohara, Yoichiro
Ohara, Takahiro
Hashimoto, Koichi
Hosoya, Mitsuaki
Affiliation: 小児科学講座
Source title: Fukushima Journal of Medical Science
Volume: 66
Issue: 2
Start page: 78
End page: 87
Issue Date: 2020
Abstract: Objective: There are few lung function tests available to evaluate bronchial asthma in infants and toddlers. The objective of this study was to test the hypothesis that the measurement of exhaled carbon monoxide (eCO) levels is applicable to evaluate infants and toddlers with stable asthma and during acute asthma attack. Methods: A one-way valve breath sampling bag was developed to collect the exhaled air of infants and toddlers. A total of 483 infants (under 2 years) and toddlers (2-5 years) were studied; 355 had an established diagnosis of asthma (182 suffering mild asthma attacks and 173 without active asthmatic symptoms), 119 had upper respiratory infection (URI) including acute bronchitis, and 9 were healthy. Results: In infants and toddlers, eCO levels of those with asthma attacks [median (interquartile range) = 2.0 (2.0-3.25) ppm, n=182] were significantly higher than those of subjects with asymptomatic asthma [2.0 (1.0-2.0) ppm, n=173, P < 0.0001], URI [2.0 (1.0-3.0) ppm, n=119, P < 0.0001], and healthy children [1.0 (0.0-1.0) ppm, n=9, P < 0.0001]. In 75 children with asthma petit mal, eCO levels during asthma attacks [3.0 (2.0-4.0) ppm] significantly decreased after therapy [1.0 (1.0-2.0) ppm, P < 0.0001]. In infants and toddlers with an established diagnosis of asthma (n=355), eCO cut-off >2 ppm discriminated asthma attack from an asymptomatic state with a sensitivity of 95.6%, a specificity of 43.3%, and an area under the curve (AUC) of 0.71 (95% CI:0.65-0.76, P < 0.0001). In 401 infants and toddlers with some respiratory symptoms, of which 285 cases were finally diagnosed as asthma [eCO level = 2.0 (2.0-3.0) ppm] and 116 cases were not asthma [eCO level = 2.0 (1.0-3.0) ppm, P < 0.0001], eCO cut-off >3 ppm supported the final diagnosis of asthma with a sensitivity of 38.9%, a specificity of 74.1%, and AUC of 0.63 (95% CI:0.56-0.69, P < 0.0001). Conclusion: The measurement of eCO by a novel method is applicable to evaluate asthmatic activity and treatment responsiveness, and to diagnose asthma in infants and toddlers.
Publisher: The Fukushima Society of Medical Science
Publisher (Alternative foam): 福島医学会
language: eng
URI: http://ir.fmu.ac.jp/dspace/handle/123456789/1322
Full text URL: http://ir.fmu.ac.jp/dspace/bitstream/123456789/1322/1/FksmJMedSci_66_p78.pdf
ISSN: 0016-2590
DOI: 10.5387/fms.2019-02
PubMed ID: 32595177
Related Page: https://doi.org/10.5387/fms.2019-02
Rights: © 2020 The Fukushima Society of Medical Science. This article is licensed under a Creative Commons [Attribution-NonCommercial-ShareAlike 4.0 International] license.
Rights: https://creativecommons.org/licenses/by-nc-sa/4.0/
Appears in Collections:Vol.66 (2020)

Files in This Item:

File Description SizeFormat
FksmJMedSci_66_p78.pdf881.61 kBAdobe PDFDownload

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard