Respirosonography in Infants With Acute Bronchiolitis

Tal, Asher; Sánchez, Ignacio; Pasterkamp, Hans

doi:10.1001/archpedi.1991.02160120073023

Cited by 16 publications

(30 citation statements)

References 23 publications

(3 reference statements)

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“…In a recent study involving a mixed group of infants with "bronchiolitis", the only acoustic study of abnormal respiratory noises in infants to date, TAL et al [16] described complex repetitive waveforms that were different from wheeze. To the listener, they were less musical and more "raspy" than the typical wheeze.…”

Section: Discussionmentioning

confidence: 99%

When a “wheeze” is not a wheeze: acoustic analysis of breath sounds in infants

Elphick¹,

Ritson²,

Rodgers³

et al. 2000

Eur Respir J

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Epidemiological studies indicate that the prevalence of "wheeze" is very high in early childhood. However, it is clear that parents and clinicians frequently use the term "wheeze" for a range of audible respiratory noises. The commonest audible sounds originating from the lower airways in infancy are ruttles, which differ from classical wheeze in that the sound is much lower in pitch, with a continuous rattling quality and lacking any musical features. The aim of this study was to clearly differentiate wheeze and ruttles objectively using acoustic analysis.Lung sounds were recorded in 15 infants, seven with wheeze and eight with ruttles, using a small sensitive piezoelectric accelerometer, and information relating to the respiratory cycle was obtained using inductive plethysmography. The acoustic signals were analysed using a fast fourier transformation technique (Respiratory Acoustics Laboratory Environment programme).The acoustic properties of the two noises were shown to be quite distinct, the classical wheeze being characterized by a sinusoidal waveform with one or more distinct peaks in the power spectrum display; the ruttle is represented by an irregular nonsinusoidal waveform with diffuse peaks in the power spectrum and with increased sound intensity at a frequency of <600 Hz.It is important for clinicians and epidemiologists to recognize that there are distinct types of audible respiratory noise in early life with characteristic acoustic properties.

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Section: Discussionmentioning

confidence: 99%

When a “wheeze” is not a wheeze: acoustic analysis of breath sounds in infants

Elphick¹,

Ritson²,

Rodgers³

et al. 2000

Eur Respir J

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show abstract

“…Similar to previous studies, a concentration of 3% was used with a 4-mL volume. 9,[17][18][19][20] The PulmoTrack system consists of two acoustic sensors attached to the skin over the trachea and chest with disposable insulating adhesive pads, a pneumograph belt sensor to document breathing activity, and an ambient microphone to filter environmental noises, all attached to a laptop. Wheezing was detected using the KarmelSonix software with advanced algorithms that apply strict criteria to determine the presence of wheezing.…”

Section: Methodsmentioning

confidence: 99%

“…In a study including 16 infants with bronchiolitis, 7 infants showed a decrease in proportion of wheezing (time spent wheezing/total respiratory time) after nebulization with salbutamol. 9 Another study including 27 children with RSV bronchiolitis found no significant change in objective quantification of wheezing and crackles 10 min after nebulization with epinephrine and albuterol. 15 Both studies concluded that computerized lung sound analysis is feasible in young infants with bronchiolitis and that it provides a noninvasive, quantitative measure of wheezing.…”

Section: Clinical and Demographic Data Valuesmentioning

confidence: 97%

“…9 Computerized wheeze detection has been shown to be feasible in young children. 10 In healthy adult volunteers, specificity and sensitivity for detection of cough events are high (94% and 96%, respectively).…”

Section: Introductionmentioning

confidence: 99%

“…13 Respirosonography was successfully used in children with RSV bronchiolitis to evaluate wheeze patterns 14 and to assess treatment efficacy of nebulized salbutamol and epinephrine. 9,15 The authors concluded that it provided a noninvasive method for objective clinical assessment of young children with wheezing.…”

Section: Introductionmentioning

confidence: 99%

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