What is the compression to ventilation ratio for BLS with airway?

• A. 30:2
• B. 15:2
• C. 30:1
• D. 20:2

Answer: (A)

When an airway is in place during BLS, the emphasis shifts from pausing between cycles to keeping chest compressions going continuously while providing ventilations. You deliver one breath every six seconds (about 10 breaths per minute) and keep chest compressions at a rate of 100–120 per minute. There isn’t a fixed compression-to-ventilation ratio like 30:2 in this setup—the airway allows ventilation without interrupting the ongoing compressions.

This approach contrasts with the traditional 30:2 pattern used when no advanced airway is in place, where you pause after every 30 compressions to deliver 2 breaths. With an airway, aim for continuous chest compressions with breaths interspersed every 6 seconds, ensuring you still ventilate adequately without over-ventilating or interrupting blood flow.