[Clinical signs of dysphagia in infants with acute viral bronchiolitis]
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Updated: Apr 19, 2026

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
Published on: March 1, 2015
Lisiane De Rosa Barbosa1, Erissandra Gomes2, Gilberto Bueno Fischer2
1Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brasil.
Insights
Infants with acute viral bronchiolitis often show swallowing difficulties (dysphagia) and altered respiratory patterns during feeding. Early identification of these feeding issues is crucial for better infant outcomes.
Area of Science:
- Pediatrics
- Neonatology
- Clinical Medicine
Background:
- Acute viral bronchiolitis is a common respiratory illness in infants.
- Feeding difficulties and dysphagia can complicate the clinical course of bronchiolitis.
Purpose of the Study:
- To identify clinical signs of dysphagia in infants with acute viral bronchiolitis.
- To compare respiratory parameters during swallowing.
- To assess the reliability of clinical swallowing evaluations.
Main Methods:
- Cross-sectional study involving 42 infants (0-12 months) with acute viral bronchiolitis.
- Clinical swallowing evaluation, respiratory rate, and pulse oximetry measurements.
- Caregiver questionnaires on feeding difficulties and a swallowing disorder score were used.
Main Results:
- Observed changes in oral and pharyngeal swallowing phases (e.g., prolonged pauses, coughing, gagging).
- Significant increase in respiratory rate and tachypnea post-feeding; decreased oxygen saturation associated with swallowing disorders.
- Higher reported feeding difficulties correlated with more swallowing changes.
Conclusions:
- Infants with acute viral bronchiolitis exhibit swallowing disorders and respiratory changes during feeding.
- Clinical signs suggest a higher probability of dysphagia in these infants, necessitating further evaluation.
Objective:
To determine the occurrence of clinical signs of dysphagia in infants with acute viral bronchiolitis, to compare the respiratory parameters during deglutition, and to ensure the intra- and inter- examiners agreement, as well as to accomplish intra and interexaminators concordance of the clinical evaluation of the deglutition.
Methods:
This was a cross-sectional study of 42 infants aged 0-12 months. The clinical evaluation was accompanied by measurements of respiratory rate and pulse oximetry. A score of swallowing disorders was designed to establish associations with other studied variables and to ensure the intra- and interrater agreement of clinical feeding assessments. Caregivers also completed a questionnaire about feeding difficulties. Significance was set at p<0.05.
Results:
Changes in the oral phase (prolonged pauses) and pharyngeal phase (wheezing, coughing and gagging) of swallowing were found. A significant increase in respiratory rate between pre- and post-feeding times was found, and it was determined that almost half of the infants had tachypnea. An association was observed between the swallowing disorder scores and a decrease in oxygen saturation. Infants whose caregivers reported feeding difficulties during hospitalization stated a significantly greater number of changes in the swallowing evaluation. The intra-rater agreement was considered to be very good.
Conclusions:
Infants with acute viral bronchiolitis displayed swallowing disorders in addition to changes in respiratory rate and measures of oxygen saturation. It is suggested, therefore, that infants displaying these risk factors have a higher probability of dysphagia.
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