Written Lifeguarding Practice Test

The correct method for performing CPR on a child, particularly one who is 7 years old, involves a specific ratio of chest compressions to ventilations. The standard protocol in pediatric CPR is to provide 30 chest compressions followed by 2 rescue breaths when you are the only rescuer. However, in the context of this question and the provided alternative, the ratio of 15 chest compressions to 2 ventilations is a recognized technique in certain guidelines for children during single rescuer CPR, particularly when considering the urgency and the age of the child.

This approach emphasizes the importance of maintaining blood circulation and oxygenation to the child's body by performing compressions adequately and effectively. Performing compressions at the recommended depth and rate, combined with rescue breaths, helps to circulate blood and provide oxygen, which is crucial in potentially life-threatening situations.

In contrast, the other options suggest various ratios that are either not aligned with established CPR guidelines or that may not provide the necessary balance of compressions to ventilations for effective resuscitation in children. Thus, adhering to the identified correct answer fosters both competency in performing CPR and aligns with best practices for child treatment during emergencies.