Guide — Neonatal & Pediatric
Bronchiolitis (RSV) Management
The most common lower-respiratory infection in infants — how RSV bronchiolitis presents, the evidence-based supportive approach (and what not to do), the role of high-flow nasal cannula and CPAP, and the apnea and red-flag signs that demand escalation.
9 min read · Neonatal & Pediatric
Written by Apex Respiratory Editorial Team
Educational use only. This material supports respiratory therapy education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional protocols, or physician orders. Always follow facility policies and current provider orders, and verify calculations independently before clinical use.
Overview
Bronchiolitis is a viral lower-respiratory infection — most often respiratory syncytial virus (RSV) — that inflames and plugs the small airways of children under 2 years (peak 2–6 months). It is the leading cause of infant hospitalization, and its management is overwhelmingly supportive.
Key Concepts
- Pathophysiology. Inflammation, mucosal edema, sloughed epithelium, and mucus plug the bronchioles, producing air trapping, atelectasis, V/Q mismatch, and increased work of breathing.
- Typical course.1–3 days of upper-respiratory symptoms (rhinorrhea, congestion) progressing to cough, tachypnea, wheeze and/or fine crackles, and feeding difficulty, usually worst on days 3–5.
- RSV is the most common cause. It spreads by droplet and contact, so hand hygiene and contact precautions are central.
- Higher risk for severe disease. Age under 12 weeks, prematurity, congenital heart disease, chronic lung disease, immunodeficiency, and neuromuscular disease.
| Risk Factor | Why It Matters |
|---|---|
| Age under 12 weeks | Highest risk; apnea more likely |
| Prematurity | Immature airways and ventilatory drive |
| Congenital heart disease | Limited cardiopulmonary reserve |
| Chronic lung disease | Reduced baseline respiratory function |
| Immunodeficiency | Impaired viral clearance |
| Neuromuscular disease | Weak cough and secretion clearance |
Assessment & Findings
- Tachypnea, wheezing and/or fine crackles, prolonged expiration, retractions, nasal flaring, hypoxemia, and poor feeding or dehydration.
- Apnea — especially in young or premature infants — can be the presenting sign.
- Red flags: apnea, persistently low SpO₂, marked retractions or grunting, poor feeding or dehydration, lethargy, and a rising CO₂ that signals fatigue.
RT Priorities & Interventions
- Supportive care is the mainstay. Supplemental oxygen for hypoxemia (target SpO₂ at least 90%), nasal suctioning to clear secretions, hydration and feeding support, and minimal handling.
- Heated high-flow nasal cannula (HFNC). For moderate-to-severe disease, HFNC provides nasopharyngeal washout and some distending pressure, reducing work of breathing and the need for intubation; CPAP is used for impending failure.
- Escalate when needed. Move to noninvasive ventilation or intubation for apnea, exhaustion, or a rising CO₂.
- Prevention. Hand hygiene, RSV immunoprophylaxis (nirsevimab, or palivizumab in selected high-risk infants), and the maternal RSV vaccine.
What Not To Do (per AAP guidance)
| Avoid | Rationale |
|---|---|
| Routine bronchodilators (albuterol) | Do not change the disease course |
| Routine systemic corticosteroids | Not recommended in bronchiolitis |
| Routine nebulized hypertonic saline in the ED | Limited role for hospitalized infants per local protocol |
| Routine chest X-rays and antibiotics | Bronchiolitis is a viral illness |
| Routine deep or aggressive suctioning | Reserve suctioning for clearing secretions |
Common Pitfalls
- Reflexively treating the wheeze with albuterol — the obstruction is edema and mucus, not bronchospasm, so routine bronchodilators are not recommended.
- Letting continuous pulse oximetry drive unnecessary oxygen and admissions.
- Missing apnea risk in the youngest infants.
Board Exam Pearls
- RSV is the most common cause; bronchiolitis affects infants under 2 years.
- Management is supportive — oxygen, suctioning, and hydration, with HFNC or CPAP for severe disease.
- Routine bronchodilators, steroids, antibiotics, and chest X-rays are NOT recommended.
- Apnea can be the presenting sign in young infants.
- Prevention combines hand hygiene with RSV immunoprophylaxis.
FAQ
Should I give albuterol for the wheeze in bronchiolitis?
Not routinely. The wheeze comes from airway edema, mucus, and debris rather than bronchospasm, and trials show bronchodilators do not change the disease course. Care is supportive, and routine bronchodilators are not recommended.
What is the role of high-flow nasal cannula?
Heated HFNC delivers warmed, humidified oxygen with nasopharyngeal washout and some distending pressure, reducing work of breathing in moderate-to-severe bronchiolitis and lowering the need for intubation. CPAP is used as the disease worsens toward failure.
Why is apnea a concern?
Young and premature infants with RSV can have central apnea as a presenting or early sign, sometimes before significant respiratory distress, so the youngest infants warrant close monitoring.
What actually prevents bronchiolitis?
Hand hygiene and contact precautions, plus RSV immunoprophylaxis (nirsevimab, or palivizumab in selected high-risk infants) and maternal RSV vaccination.
Put it to work
In a tiring infant, a rising CO₂ on the gas signals fatigue. Practice interpreting it.
Open the ABG Interpreter →Related Resources
Sources
- Kacmarek RM, Stoller JK, Heuer AJ. Egan's Fundamentals of Respiratory Care. 12th ed. Elsevier; 2021. Pediatric respiratory disorders chapters.
- Ralston SL, Lieberthal AS, Meissner HC, et al. Clinical Practice Guideline: The Diagnosis, Management, and Prevention of Bronchiolitis. Pediatrics. 2014;134(5):e1474-e1502.