Changes in the breath sound spectrum with bronchodilation in children with asthma

Nukaga, Mariko; Tabata, Hideyuki; Enseki, Mayumi; Hirai, Kota; Furuya, Hiroyuki; Katô, Masahiko; Mochizuki, Hiroyuki

doi:10.1016/j.resinv.2018.05.004

Cited by 14 publications

(27 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to previous reports, the values of parameters increase with bronchial dilatation and decrease with bronchial constriction, and the values of A 3 /A T , B 4 /A T , RPF 75 , and RPF 50 also decrease. 11 , 12 In addition to the above, the frequency limiting 99% of the power spectrum (F 99 ) was also measured in accordance with the methods of previous reports. 18 , 19 , 20 …”

Section: Methodsmentioning

confidence: 94%

“… 8 , 9 , 10 The major problems associated with performing lung sound analyses in infants and younger children have gradually been improved. 11 , 12 We have assessed the airway condition of infants and children via a lung sound analysis, which is a simple and safe technique, 13 and the clinical objective information related to lung sound analyses has also been reported. 14 In addition, we recently made further improvements to the analytical system for lung sound analyses.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lung sound analysis in infants with risk factors for asthma development

Miyamoto

Yoshihara

Shioya

et al. 2021

Health Science Reports

Self Cite

View full text Add to dashboard Cite

Background and objectives Using a lung sound analysis, the prognosis of asthma was investigated in infants with risk factors for asthma development by a long‐term observation. Methods A total of 268 infants were included (median age: 8 months old). The lung sound parameters (the ratio of the third and fourth area to the total area under the curve [A 3 /A T and B 4 /A T ], and the ratio of power and frequency at 50% and 75% of the highest frequency [RPF 50 and RPF 75 ]) were evaluated at the first visit. At 3 years old, using a questionnaire, we examined the relationship between the lung sound parameters and risk factors of asthma development. Results Among the 268 infants, 175 infants were in good health and 93 had a history of acute respiratory infection (ARI) within 7 days at the first visit. Among the 3‐ to 12‐month‐old infants with an ARI, the A 3 /A T , B 4 /A T values in those with a history of asthma/asthmatic bronchitis, atopic dermatitis, and atopy were smaller than in the infants without such histories. Among the 13‐ to 24‐month‐old infants with an ARI, the A 3 /A T and B 4 /A T values in those with a wheezing history were larger than in the infants without such a history. Conclusions The characteristics of the lung sounds in infants with risk factors for asthma development were demonstrated over long‐term follow‐up. Lung sound analyses may be useful for assessing the airway condition of infants.

show abstract

Section: Methodsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Lung sound analysis in infants with risk factors for asthma development

Miyamoto

Yoshihara

Shioya

et al. 2021

Health Science Reports

Self Cite

View full text Add to dashboard Cite

show abstract

“…We recently investigated the potential utility of a breath sound analysis as a non‐invasive, reliable lung function test for children with asthma and infants . On analysis of a sound spectrogram, we identified and digitized the audible wheezing and FW in children .…”

Section: Discussionmentioning

confidence: 99%

“…The data were automatically calculated using a custom software program . The parameters of the total power of the power spectrum (P T )(log[mV 2 ]), the roll‐off of the middle spectrum curve (slope, −dBm/octave) and the frequency limiting 99% of the power spectrum (F 99 ) were measured in accordance with previous reports . The total area under the curve (A T ), the third area under the curve (A 3 ) and the forth area under the curve (B 4 ) were conventionally calculated using dBm and Hz (1 arbitrary unit [dBm・Hz] on a spectrum image).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Objective evaluation of wheezing in normal infants

Murayama¹,

Shioya

Tadaki

et al. 2019

Pediatrics International

Self Cite

View full text Add to dashboard Cite

Background: To evaluate the frequency of wheezing in infants, the presence of wheezing was examined in normal infants using a breath sound analyzer, Methods: A total of 443 infants (age range, 3-24 months) were included in the present study. The existence of audible wheezing and faint wheezing/inaudible wheezing-like noises (FW) was confirmed on chest auscultation and a sound spectrogram. The breath sound parameters of the sound spectrum, frequency limiting 99% of power spectrum (F 99 ), roll-off from 600 to 1,200 Hz (slope) and spectrum curve indices, total area under the curve of dB data (A 3 /A T and B 4 /A T ), and ratio of power and frequency at 50% and 75% of the highest frequency of the power spectrum (RPF 50 and RPF 75 ) were calculated. Using an original Japanese questionnaire, we examined the characteristics of the airway condition of all infants. Results: Finally, a total of 398 infants were analyzed in the present study, and 283 were in good health while 115 had acute respiratory infection (ARI) in the last 7 days. No infants had audible wheezing on auscultation. Three infants without ARI (1.1%) and 10 infants with ARI (8.7%) had FW. In the evaluation of breath sound parameters, there were no marked differences between the infants with and without FW. Conclusions: Using a breath sound analyzer, wheezing and FW were recognized in only a few infants in good health. Infants recognized to have audible wheezing in daily practice may be at risk of developing recurrent wheezing/asthma. A total of 443 infants (mean age, 9.9 months; range, 3-24 months, male : female, 232:211) who attended an infant

show abstract

Breath sound analyses of infants with respiratory syncytial virus acute bronchiolitis

Kuruma

Otomo²,

Sakama³

et al. 2022

Pediatric Pulmonology

Self Cite

View full text Add to dashboard Cite

Introduction:The reliability of a breath sound analysis using an objective method in infants has been reported.Objective: Breath sounds of infants with respiratory syncytial virus (RSV) acute bronchiolitis were analyzed via a breath sound spectrogram to evaluate their characteristics and examine their relationship with the severity. Subjects and Methods:We evaluated the inspiratory and expiratory breath sound parameters of 33 infants diagnosed with RSV acute bronchiolitis. The sound powers of inspiration and expiration were evaluated at the acute phase and recovery phase of infection. Furthermore, the relationship between the breath sound parameters and the clinical severity of acute bronchiolitis was examined.Results: Analyses of the breath sound spectrogram showed that the power of expiration as well as the expiration-to-inspiration sound ratio in the mid-frequency (E/I MF) was increased in the acute phase and decreased during the recovery phase.The E/I MF was inversely correlated with the SpO 2 and positively correlated with the severity score. Conclusion:In infants with RSV acute bronchiolitis, the sound power of respiration was large at the acute phase, significantly decreasing in the recovery phase. In 61% of participants, nonuniform, granular bands were shown in the low-pitched region of the expiratory spectrogram.

show abstract

Changes in the breath sound spectrum with bronchodilation in children with asthma

Cited by 14 publications

References 24 publications

Lung sound analysis in infants with risk factors for asthma development

Lung sound analysis in infants with risk factors for asthma development

Objective evaluation of wheezing in normal infants

Breath sound analyses of infants with respiratory syncytial virus acute bronchiolitis

Contact Info

Product

Resources

About