In pediatric care, blow-by oxygen is typically delivered at what flow rate?

• A. 2 L
• B. 5 L
• C. 8 L
• D. 10 L

Answer: (B)

Blow-by oxygen is a low-flow method used with pediatric patients when you don’t want to seal a mask to the face. The goal is to provide some supplemental oxygen without creating a tight fit or causing distress, so the flow should be modest and allow the oxygen to drift toward the airway. A typical delivery rate is about 5 L/min, which sits in the common pediatric range (roughly 4–6 L/min) and offers a steady stream without being too strong or uncomfortable. Higher flow rates (8–10 L/min) are too vigorous for blow-by and are more aligned with mask-based delivery, while too low a flow (like 2 L/min) may not provide a meaningful oxygen effect in most pediatric cases.