What is the compression to ventilation ratio for adults when performed by one responder?

The compression to ventilation ratio for adults when performed by one rescuer is 30:2. This means that for every 30 chest compressions administered, the rescuer should provide 2 rescue breaths. This ratio is designed to maximize blood flow during cardiopulmonary resuscitation (CPR) while ensuring that the individual receives adequate oxygenation through ventilations.

This approach is based on a balance of compressions and breaths that supports effective circulation and ventilation, crucial for sustaining life in a cardiac emergency. The 30:2 ratio has been standardized in guidelines to provide clear direction for single rescuer scenarios, making it easier for responders to remember and perform correctly in a high-stress situation.

The other options present different ratios that are not recommended for adult CPR. The focus remains on the priority of chest compressions to maintain circulation, hence the established ratio of 30:2 is critical for efficiency and effectiveness during resuscitation efforts.