1
|
Miyamoto M, Yoshihara S, Shioya H, Tadaki H, Imamura T, Enseki M, Furuya H, Kato M, Mochizuki H. Lung sound analysis for predicting recurrent wheezing in preschool children. J Allergy Clin Immunol Glob 2024; 3:100199. [PMID: 38261936 PMCID: PMC10796953 DOI: 10.1016/j.jacig.2023.100199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 09/22/2023] [Accepted: 09/26/2023] [Indexed: 01/25/2024]
Abstract
Background In young healthy children, assessing airflow limitation may be difficult because of narrowing of the airways, which is a pathology of asthma, and responsiveness to bronchodilators. Objective We investigated whether lung sound analysis could predict the development of recurrent wheezing (RW), which is one of the signs of asthma. Methods In healthy children aged 3 to 24 months, we recorded and analyzed lung sounds before and after inhalation of bronchodilators and conducted a questionnaire survey. The children were followed up and assessed for the development of RW at age 3 years. Results Of the 62 patients analyzed, 19 (30.6%) developed RW. The parameters ratio of power and frequency at 50% of the highest frequency of the dB power spectrum (RPF50) and ratio of power and frequency at 75% of the highest frequency of the dB power spectrum (RPF75), calculated by lung sound analysis, were lower in the RW group, with odds ratios of 0.77 (95% CI = 0.61-0.98) and 0.81 (95% CI = 0.66-0.99), respectively. The rate of change of lung sound analysis parameters after bronchodilator inhalation did not differ among the participants as a group; however, in the subgroup of children with a history of atopic dermatitis, the fourth area under the curve (B4) divided by the total area under the curve of 100 Hz to the highest frequency of the dB power spectrum (AT) and difference between the values of the ratio of power and frequency at 50% of the highest frequency of the dB power spectrum (ΔRPF50) were elevated in the RW group (P = .015 and P = .041, respectively). In the subgroup of children with total a IgE level greater than 20 kUA/L, the sensitivities and specificities for predicting the development of RW were 85.7% (95% CI = 48.7-99.3) and 68.8% (95% CI = 44.4-85.8), respectively, when the cutoff value of ΔRPF50 was set at 10.5%. Conclusion The method of lung sound analysis allows noninvasive assessment of the airway, including airway hypersensitivity, in young children and may predict the risk of development of RW.
Collapse
Affiliation(s)
- Manabu Miyamoto
- Department of Pediatrics, Dokkyo Medical University, Mibu, Japan
| | | | - Hiromi Shioya
- Division of Pediatrics, National Hospital Organization Yokohama Medical Center, Yokohama, Japan
| | - Hiromi Tadaki
- Division of Pediatrics, National Hospital Organization Yokohama Medical Center, Yokohama, Japan
| | - Tomohiko Imamura
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Japan
| | - Mayumi Enseki
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Japan
| | - Hiroyuki Furuya
- Department of Basic Clinical Science and Public Health, Tokai University School of Medicine, Isehara, Japan
| | - Masahiko Kato
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Japan
- Department of Pediatrics, Tokai University Hachioji Hospital, Tokyo, Japan
| | - Hiroyuki Mochizuki
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Japan
- Department of Pediatrics, Tokai University Hachioji Hospital, Tokyo, Japan
| |
Collapse
|
2
|
Ghulam Nabi F, Sundaraj K, Shahid Iqbal M, Shafiq M, Planiappan R. A telemedicine software application for asthma severity levels identification using wheeze sounds classification. Biocybern Biomed Eng 2022. [DOI: 10.1016/j.bbe.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
3
|
Abreu V, Oliveira A, Alberto Duarte J, Marques A. Computerized respiratory sounds in paediatrics: A systematic review. Respiratory Medicine: X 2021; 3:100027. [DOI: 10.1016/j.yrmex.2021.100027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
|
4
|
Miyamoto M, Yoshihara S, Shioya H, Tadaki H, Imamura T, Enseki M, Koike H, Furuya H, Mochizuki H. Lung sound analysis in infants with risk factors for asthma development. Health Sci Rep 2021; 4:e379. [PMID: 34557596 PMCID: PMC8448393 DOI: 10.1002/hsr2.379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/23/2021] [Accepted: 08/24/2021] [Indexed: 12/03/2022] Open
Abstract
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 [A3/AT and B4/AT], and the ratio of power and frequency at 50% and 75% of the highest frequency [RPF50 and RPF75]) 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 A3/AT, B4/AT 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 A3/AT and B4/AT 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.
Collapse
Affiliation(s)
| | | | - Hiromi Shioya
- Division of PediatricsNational Hospital Organization Yokohama Medical CenterYokohamaJapan
| | - Hiromi Tadaki
- Division of PediatricsNational Hospital Organization Yokohama Medical CenterYokohamaJapan
| | - Tomohiko Imamura
- Department of PediatricsTokai University School of MedicineIseharaJapan
| | - Mayumi Enseki
- Department of PediatricsTokai University School of MedicineIseharaJapan
| | - Hideki Koike
- Department of PediatricsTokai University School of MedicineIseharaJapan
| | - Hiroyuki Furuya
- Department of Basic Clinical Science and Public HealthTokai University School of MedicineIseharaJapan
| | | |
Collapse
|
5
|
Karimizadeh A, Vali M, Modaresi M. Multichannel lung sound analysis to detect severity of lung disease in cystic fibrosis. Biomed Signal Process Control 2021; 64:102266. [DOI: 10.1016/j.bspc.2020.102266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
6
|
Ishizu H, Shioya H, Tadaki H, Yamazaki F, Miyamoto M, Enseki M, Tabata H, Niimura F, Furuya H, Ito S, Yoshihara S, Mochizuki H. A Lung Sound Analysis in Infants with Risk Factors for Asthma During Acute Respiratory Infection. Pediatr Allergy Immunol Pulmonol 2020; 33:147-154. [PMID: 35922027 PMCID: PMC9354036 DOI: 10.1089/ped.2019.1131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 07/26/2020] [Indexed: 06/15/2023]
Abstract
Background: The parameters of lung sounds have been suggested as biomarkers of airway changes. Using a commercially available lung sound analyzer, we investigated the characteristics of the lung sounds in infants with acute respiratory infection (ARI). Methods: Infants with ARI who were 6 to 18 months of age were included in this study. The lung sound parameters, the ratio of the third area and fourth areas to the total area under the curve of the sound spectrum (A3/AT and B4/AT), and the ratio of power and frequency at 75% and 50% of the highest frequency of the power spectrum (RPF75 and RPF50) were evaluated. With an original Japanese questionnaire based on American Thoracic Society-Division of Lung Disease, the risk factors of asthma development in infants were examined. Results: One hundred ten infants with ARI and 248 infants in good health for comparison were included. All infants were completely analyzed, and then divided into 2 age groups for a stratification analysis (6-12 and 13-18 months). In the overall analysis, among infants with a history of wheezing, recurrent wheezing, allergy, and atopic dermatitis, the values of RPF50 of infants with ARI were significantly lower compared with those without ARI. In the 6- to 12-month-old group, the RPF50 values of atopy-positive infants with ARI were lower compared with those without ARI (P = 0.003). Conclusions: The lung sounds of the infants with asthma-developing risk factors were more affected by ARI than those of infants without risk factors. Analyzing the changes in the lung sounds induced by ARI may be useful for evaluating the characteristics of the airways in infants.
Collapse
Affiliation(s)
- Hiroko Ishizu
- Department of Pediatrics, Saiseikai Yokohamashi Tobu Hospital, Yokohama, Japan
| | - Hiromi Shioya
- Division of Pediatrics, National Hospital Organization Yokohama Medical Center, Yokohama, Japan
| | - Hiromi Tadaki
- Division of Pediatrics, National Hospital Organization Yokohama Medical Center, Yokohama, Japan
| | | | - Manabu Miyamoto
- Department of Pediatrics, Dokkyo Medical University, Shimotsuga-gun, Japan
| | - Mayumi Enseki
- Department of Pediatrics and Tokai University School of Medicine, Isehara, Japan
| | - Hideyuki Tabata
- Department of Pediatrics and Tokai University School of Medicine, Isehara, Japan
| | - Fumio Niimura
- Department of Pediatrics and Tokai University School of Medicine, Isehara, Japan
| | - Hiroyuki Furuya
- Department of Basic Clinical Science and Public Health, Tokai University School of Medicine, Isehara, Japan
| | - Shuichi Ito
- Department of Pediatrics, Yokohama City University School of Medicine, Yokohama, Japan
| | - Shigemi Yoshihara
- Department of Pediatrics, Dokkyo Medical University, Shimotsuga-gun, Japan
| | - Hiroyuki Mochizuki
- Department of Pediatrics and Tokai University School of Medicine, Isehara, Japan
| |
Collapse
|
7
|
Zhou L, Marzbanrad F, Ramanathan A, Fattahi D, Pharande P, Malhotra A. Acoustic analysis of neonatal breath sounds using digital stethoscope technology. Pediatr Pulmonol 2020; 55:624-630. [PMID: 31917903 DOI: 10.1002/ppul.24633] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 12/27/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND There is no published literature regarding the use of the digital stethoscope (DS) and computerized breath sound analysis in neonates, despite neonates experiencing a high burden of respiratory disease. We aimed to determine if the DS could be used to study breath sounds of term and preterm neonates without respiratory disease, and detect a difference in acoustic characteristics between them. METHODS A commercially available DS was used to record breath sounds of term and preterm neonates not receiving respiratory support between 24 and 48 hours after birth. Recordings were extracted, filtered, and computer analysis performed to obtain power spectra and mel frequency cepstral coefficient (MFCC) profiles. RESULTS Recordings from 26 term and 26 preterm infants were obtained. The preterm cohort had an average gestational age (median and interquartile range) of 32 (31-33) weeks and term 39 (38-39) weeks. Birth weight (mean and SD) was 1767 (411) g for the preterm and 3456 (442) g for the term cohort. Power spectra demonstrated the greatest power in the low-frequency range of 100 to 250 Hz for both groups. There were significant differences (P < .05) in the average power at low (100-250 Hz), medium (250-500 Hz), high (500-1000 Hz), and very high (1000-2000 Hz) frequency bands. MFCC profiles also demonstrated significant differences between groups (P < .05). CONCLUSION It is feasible to use DS technology to analyze breath sounds in neonates. DS was able to determine significant differences between the acoustic characteristics of term and preterm infants breathing in room air. Further investigation of DS technology for neonatal breath sounds is warranted.
Collapse
Affiliation(s)
- Lindsay Zhou
- Monash Newborn, Monash Children's Hospital, Melbourne, Australia.,Department of Paediatrics, Monash University, Melbourne, Australia
| | - Faezeh Marzbanrad
- Department of Computer Systems and Electrical Engineering, Monash University, Melbourne, Australia
| | | | - Davood Fattahi
- Department of Computer Systems and Electrical Engineering, Monash University, Melbourne, Australia
| | | | - Atul Malhotra
- Monash Newborn, Monash Children's Hospital, Melbourne, Australia.,Department of Paediatrics, Monash University, Melbourne, Australia
| |
Collapse
|
8
|
Murayama Y, Shioya H, Tadaki H, Miyamoto M, Yoshihara S, Tabata H, Furuya H, Uchiyama A, Mochizuki H. Objective evaluation of wheezing in normal infants. Pediatr Int 2019; 61:956-961. [PMID: 31449704 DOI: 10.1111/ped.13994] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/25/2019] [Accepted: 08/21/2019] [Indexed: 11/30/2022]
Abstract
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 (F99 ), roll-off from 600 to 1,200 Hz (slope) and spectrum curve indices, total area under the curve of dB data (A3 /AT and B4 /AT ), and ratio of power and frequency at 50% and 75% of the highest frequency of the power spectrum (RPF50 and RPF75 ) 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.
Collapse
Affiliation(s)
- Yoshifumi Murayama
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Hiromi Shioya
- Division of Pediatrics, National Hospital Organization Yokohama Medical Center, Yokohama, Kanagawa, Japan
| | - Hiromi Tadaki
- Division of Pediatrics, Yamato Municipal Hospital, Yamato, Kanagawa, Japan
| | - Manabu Miyamoto
- Department of Pediatrics, Dokkyo Medical University, Shimotsuga, Tochigi, Japan
| | - Shigemi Yoshihara
- Department of Pediatrics, Dokkyo Medical University, Shimotsuga, Tochigi, Japan
| | - Hideyuki Tabata
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Hiroyuki Furuya
- Department of Basic Clinical Science and Public Health, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Atsushi Uchiyama
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Hiroyuki Mochizuki
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| |
Collapse
|
9
|
Moon YJ, Bechtel AJ, Kim SH, Kim JW, Thiele RH, Blank RS. Detection of intratracheal accumulation of thick secretions by using continuous monitoring of respiratory acoustic spectrum: a preliminary analysis. J Clin Monit Comput 2020; 34:763-70. [PMID: 31327100 DOI: 10.1007/s10877-019-00359-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 07/16/2019] [Indexed: 12/19/2022]
Abstract
The accumulation of tracheobronchial secretions may contribute to a deterioration in pulmonary function and its early detection is important. In this study, we analyzed the respiratory sound spectrum in patients with intratracheal secretion, and compared acoustic characteristics before and after therapeutic endotracheal suctioning. After review of anesthetic records of liver transplant recipients, we included recipients with identified intratracheal secretion during surgery. Intraoperative breath sounds recorded through esophageal stethoscope were sampled in 20 s-period before and after suctioning of secretion and analyzed using fast Fourier transform. We also analyzed normal breath sounds from recipients without any respiratory problem as control group. The maximal power (dBmMax), total power from whole frequency range of 80-500 Hz (Pt), total power of each frequency range (80-200 Hz, P80-200; 200-300 Hz, P200-300; 300-400 Hz, P300-400; 400-500 Hz, P400-500), and their ratio (P80-200/Pt, P200-300/Pt, P300-400/Pt, P400-500/Pt) were compared. Breath sounds were obtained from 20 recipients; 9 pairs of breath sound before and after suctioning of secretion and 11 normal breath sounds. Patients with intratracheal secretion showed significantly higher P80-200, P200-300, P300-400, P400-500 when compared to the those of normal control patients (P = 0.003, P = 0.002, and P = 0.009, respectively), while dBmMax did not differ. Elimination of secretions attenuated P80-200, P200-300, P300-400, and P400-500 by 22.4%, 25.7%, 48.5%, and 15.3%, respectively (P = 0.002, 0.024, 0.009, and 0.016, respectively). Identifying the presence of intratracheal secretions with power ratio at 80-200 Hz and 300-400 Hz showed the highest area under the curve of 0.955 in receiver operating characteristic curve analysis. We suggest that spectral analysis of breath sounds obtained from the esophageal stethoscope might be a useful non-invasive respiratory monitor for accumulation of intratracheal secretion. Further prospective studies to evaluate the utility of acoustic analysis in surgical patients are warranted.
Collapse
|
10
|
Nabi FG, Sundaraj K, Lam CK. Identification of asthma severity levels through wheeze sound characterization and classification using integrated power features. Biomed Signal Process Control 2019. [DOI: 10.1016/j.bspc.2019.04.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
11
|
Upham JW. Contemporary Concise Review 2018: Asthma and chronic obstructive pulmonary disease. Respirology 2019; 24:693-699. [PMID: 30945412 DOI: 10.1111/resp.13553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 03/20/2019] [Indexed: 11/29/2022]
Affiliation(s)
- John W Upham
- Princess Alexandra Hospital, The University of Queensland, Brisbane, QLD, Australia
| |
Collapse
|
12
|
Enseki M, Nukaga M, Tadaki H, Tabata H, Hirai K, Kato M, Mochizuki H. A breath sound analysis in children with cough variant asthma. Allergol Int 2019; 68:33-38. [PMID: 29857933 DOI: 10.1016/j.alit.2018.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 04/15/2018] [Accepted: 05/03/2018] [Indexed: 10/16/2022] Open
Abstract
BACKGROUND Cough variant asthma (CVA) is characterized by a chronic cough and bronchial hyperresponsiveness without confirmation of wheezing. Using a breath sound analyzer, we evaluate the characteristics of breath sound in children with CVA. METHODS Nine children with CVA (median age, 7.0 years) participated. The existence of breath sounds was confirmed by sound spectrogram. Breath sound parameters, the frequency limiting 50% and 99% of the power spectrum (F50 and F99), the roll-off from 600 to 1200 Hz (Slope) and spectrum curve indices, the ratio of the third and fourth area to the total area of the power spectrum (P3/PT and P4/PT) and the ratio of power and frequency at 50% and 75% of the highest frequency of the power spectrum (RPF75 and RPF50) were calculated before and after β2 agonist inhalation. A spirogram and/or forced oscillation technique were performed in all subjects. RESULTS On a sound spectrogram, wheezing was confirmed in seven of nine patients. All wheezing on the image was polyphonic, and they almost disappeared after β2 agonist inhalation. An analysis of the breath sound spectrum showed that PT, P3/PT, P4/PT, RPF50 and RPF75 were significantly increased after β2 agonist inhalation. CONCLUSIONS Children with CVA showed a high rate of inaudible wheezing that disappeared after β2 agonist inhalation. Changes in the spectrum curve indices also indicated the bronchial reversibility. These results may suggest the characteristics of CVA in children.
Collapse
|
13
|
Shioya H, Tadaki H, Yamazaki F, Miyamoto M, Yoshihara S, Enseki M, Tabata H, Hirai K, Furuya H, Kato M, Ito S, Mochizuki H. Characteristics of breath sound in infants with risk factors for asthma development. Allergol Int 2019; 68:90-5. [PMID: 30213444 DOI: 10.1016/j.alit.2018.07.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 07/21/2018] [Accepted: 07/24/2018] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Breath sound parameters have been suggested as biomarkers of the airway narrowing in children. Using a commercially available breath sound analyzer, the characteristics of the airway condition were investigated in infants with the risk factors for asthma development. METHODS A total of 443 infants (mean age, 9.9 months; range, 3-24 months) were included in the present study. The breath sound parameters of the frequency limiting 99% of the power spectrum (F99), the roll-off from 600 to 1200 Hz (Slope) and spectrum curve indices, the total area under the curve of the dBm data (A3/AT) and the ratio of power and frequency at 50% and 75% of the highest frequency of the power spectrum (RPF75 and RPF50), were evaluated. Using an ATS-DLD based original Japanese questionnaire, we examined the characteristics of airway condition of infants. RESULTS Finally, 283 infants in good health were included in the present study. The RPF75, RPF50, Slope and F99 in infants with positive results of allergy and atopic dermatitis were significantly increased more than those in the infants with negative result. CONCLUSIONS Our data highlight the characteristics of breath sounds in infants with risk factors for asthma. The breath sound analysis may be useful for assessing the airways of infants for asthma development.
Collapse
|
14
|
Nabi FG, Sundaraj K, Lam CK, Palaniappan R. Characterization and classification of asthmatic wheeze sounds according to severity level using spectral integrated features. Comput Biol Med 2019; 104:52-61. [PMID: 30439599 DOI: 10.1016/j.compbiomed.2018.10.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/31/2018] [Accepted: 10/31/2018] [Indexed: 11/21/2022]
Abstract
OBJECTIVE This study aimed to investigate and classify wheeze sounds of asthmatic patients according to their severity level (mild, moderate and severe) using spectral integrated (SI) features. METHOD Segmented and validated wheeze sounds were obtained from auscultation recordings of the trachea and lower lung base of 55 asthmatic patients during tidal breathing manoeuvres. The segments were multi-labelled into 9 groups based on the auscultation location and/or breath phases. Bandwidths were selected based on the physiology, and a corresponding SI feature was computed for each segment. Univariate and multivariate statistical analyses were then performed to investigate the discriminatory behaviour of the features with respect to the severity levels in the various groups. The asthmatic severity levels in the groups were then classified using the ensemble (ENS), support vector machine (SVM) and k-nearest neighbour (KNN) methods. RESULTS AND CONCLUSION All statistical comparisons exhibited a significant difference (p < 0.05) among the severity levels with few exceptions. In the classification experiments, the ensemble classifier exhibited better performance in terms of sensitivity, specificity and positive predictive value (PPV). The trachea inspiratory group showed the highest classification performance compared with all the other groups. Overall, the best PPV for the mild, moderate and severe samples were 95% (ENS), 88% (ENS) and 90% (SVM), respectively. With respect to location, the tracheal related wheeze sounds were most sensitive and specific predictors of asthma severity levels. In addition, the classification performances of the inspiratory and expiratory related groups were comparable, suggesting that the samples from these locations are equally informative.
Collapse
|