Non-invasive ventilation (NIV) prevents endotracheal intubation, preserves upper airway defenses, and reduces ICU-acquired infections in pediatric respiratory failure.
Key Physiological Equations & Formulas
- Pediatric ROX Index: $$\text{ROX} = \frac{SpO_2 / FiO_2}{\text{Respiratory Rate}}$$ ROX < 3.0-3.5 at 2-6 hours on HFNC strongly predicts treatment failure and need for intubation.
Practical Clinical Pearls & Bedside Rules
- Interface Selection: Nasal prongs for infants, total face mask or oronasal mask for older children. Ensure proper mask sizing to minimize air leaks.
- Pressure Titration: Start CPAP at 5-6 cmH2O (titrate to 8-10 cmH2O). In BiPAP, start IPAP 10-12 cmH2O and EPAP 5-6 cmH2O.
Initial Settings & Clinical Titration Protocol
| Parameter | Recommended Initial Setting | Titration Goal / Safety Threshold |
|---|---|---|
| HFNC Flow Rate | 2 L/kg/min for first 10 kg, + 0.5 L/kg/min thereafter | Max 40-50 L/min. |
| BiPAP IPAP/EPAP | IPAP 12-16 / EPAP 6-8 cmH2O | Target comfortable breathing with reduction in work of breathing. |
Bedside Troubleshooting & Red Flags
Warning
Delayed Intubation Danger: Do not persevere with failing NIV in children with worsening thoracoabdominal paradox, lethargy, or rising PaCO2.
Key Takeaways & Summary
- Always evaluate patient synchrony and physiological response before changing ventilator parameters.
- Maintain lung-protective strategies to minimize driving pressure ($\Delta P$) and mechanical power.
- Continuously reassess liberation and extubation readiness on daily morning rounds.