Australasian Bronchiolitis Guideline: 2025 Update

Bronchiolitis remains one of the defining illnesses of pediatric practice, not only because of its frequency but because of the distress it causes when an infant develops cough, feeding difficulty, retractions, or respiratory distress. In emergency care, few conditions illustrate the tension between “doing more” and “doing what actually helps” as clearly as bronchiolitis. The most recent evidence reinforces that bronchiolitis is primarily a clinical diagnosis and that management should be driven by physiologic assessment rather than low-yield tests or routine medications. This is especially relevant during viral peaks in both the United States and Colombia, where acute respiratory infections continue to account for a large share of pediatric visits.  

Medically, bronchiolitis is a viral lower respiratory tract infection of infancy characterized by bronchiolar inflammation, edema, mucus production, and airflow obstruction. RSV remains the main pathogen, although other respiratory viruses also contribute. Its pathophysiology explains why supportive care is usually the most effective treatment: oxygen when indicated, adequate hydration, and close clinical monitoring. Despite persistent real-world overuse of bronchodilators, corticosteroids, and antibiotics, contemporary evidence continues to show that these interventions provide little or no routine benefit for most patients.  

The selected publication is an evidence-based guideline update developed by the PREDICT network for emergency departments, pediatric wards, and ICUs. The authors reviewed literature from January 1, 2000, through January 24, 2024, screened 26,467 citations, and included 431 references supporting 41 recommendations. Key updates include refined clinical criteria, newly recognized risk factors for severe disease, guidance on biomarkers for unexpected deterioration, revised oxygen saturation targets, updated recommendations on humidified high-flow therapy and CPAP, and inclusion of RSV prevention strategies for mothers and infants.  pubmed

From a pediatric and epidemiologic perspective, the strength of this guideline lies in how effectively it aligns bedside decisions with high-value care. In outpatient practice, it supports better family counseling about expected evolution, warning signs, and prevention. In the emergency department, it can reduce unwarranted variation and unnecessary treatments during seasonal surges. From a public health standpoint, the document also reframes bronchiolitis as not merely an individual clinical episode but as part of a broader seasonal respiratory burden that can be partly mitigated through RSV prevention strategies and standardized care pathways.