What is the recommended compression-to-ventilation ratio for adults in CPR?

The recommended compression-to-ventilation ratio for adults in CPR is 30:2. This means that for every 30 chest compressions delivered, the provider should give 2 rescue breaths. This ratio is designed to maximize the effectiveness of each cycle of CPR by ensuring that a significant amount of blood is being circulated (through compressions) while still providing necessary oxygenation (through ventilations).

The rationale behind this ratio is based on numerous studies that indicate the best chances of survival are achieved when compressions are prioritized, given that they maintain circulation and perfusion to vital organs, especially the heart and brain. The 30:2 ratio is also easy to remember and apply in emergency situations, facilitating an efficient and effective CPR technique.

In contrast, other ratios such as 15:2 or 20:2 do not optimize the balance between compressions and ventilations effectively for adults, as they allocate too few compressions in relation to the number of breaths provided. The 5:1 ratio is specifically not suited for adult resuscitation, as it significantly underplays the importance of compressions during a critical response scenario. Therefore, using the 30:2 ratio helps ensure that the body receives adequate blood flow while also introducing oxygen when needed