Related Experiment Video
Updated: Sep 2, 2026

Protocol and Guidelines for Point-of-Care Lung Ultrasound in Diagnosing Neonatal Pulmonary Diseases Based on International Expert Consensus
Published on: March 6, 2019
Changes in Lung Sounds During the Acute Stage of RSV Acute Bronchiolitis in Infants
Takashi Matsushita1, Chinami Kaiga, Kota Hirai
1Department of Pediatrics, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan. matsushita.takashi.w@tokai.ac.jp.
Objective:
Changes in the respiratory function over time in respiratory syncytial virus (RSV)-induced acute bronchiolitis were evaluated by a lung sound analysis.
Methods:
We retrospectively examined changes in lung sound parameters over time in 54 children (median age, 7 months) diagnosed with RSV acute bronchiolitis. We evaluated the power of inspiratory and expiratory sounds using a conventional method and analyzed the frequency characteristics of inspiratory sounds using new automated analysis software program. We examined changes in these lung sound parameters over time during and after hospitalization and compared these data with those of age-matched healthy children.
Results:
In 138 lung sound samples from 54 infants, the power of inspiratory and expiratory sounds was greatest within 4 days after the onset and improved over time. In contrast, the greatest changes in inspiratory sound parameters were observed at 5 to 10 days after the onset of RSV acute bronchiolitis. Some lung sound parameters in patients with RSV acute bronchiolitis did not return to normal even by 14 days after the onset.
Conclusions:
This finding is considered a characteristic of RSV acute bronchiolitis in infants and is meaningful in terms of post-treatment management.
More Related Videos
06:22Surfactant Depletion Combined with Injurious Ventilation Results in a Reproducible Model of the Acute Respiratory Distress Syndrome (ARDS)
Published on: April 7, 2021
11:27A Modified Sonographic Algorithm for Image Acquisition in Life-Threatening Emergencies in the Critically Ill Newborn
Published on: April 7, 2023
Related Concept Videos
Physical Assessment of the Respiratory Tract IV: Auscultation
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.
Assessment of Respiration
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like asthma or COPD,...
Pulmonary Cycle: Exhalation
Respiratory System Abnormal Finding II: Palpation and Auscultation
Palpation Findings
During a respiratory assessment, palpation can reveal several vital abnormalities:
Respiratory Syncytial Virus Disease
Respiratory System Abnormal Finding I: Inspection and Percussion
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...