Basic Life Support (BLS) Practice Exam

What is the compression-to-ventilation ratio after Ana-Lisa takes over compressions?

1. 5:1

2. 15:2

3. 30:2

4. 20:2

The correct answer is: 15:2

In adult CPR, the recommended compression-to-ventilation ratio during a two-rescuer scenario is 15 compressions for every 2 ventilations. This approach ensures that the patient receives adequate blood flow through compressions while also receiving appropriate rescue breaths to deliver oxygen to the lungs. This specific ratio is particularly relevant when there are two trained rescuers, as it allows for more frequent ventilation in comparison to a single rescuer performing CPR, who would use a 30:2 ratio. The rationale behind the 15:2 ratio is to maintain a sufficient cardiac output and to facilitate oxygenation, especially in an environment where there are more trained individuals available to provide breaths. Understanding these ratios is crucial for ensuring high-quality CPR and maximizing the chances of survival for a person in cardiac arrest.