EMALB First Responders (FR) Practice Exam 2025 - Free First Responders Practice Questions and Study Guide

The proper technique for performing chest compressions during CPR on an adult involves placing the hands on the lower half of the sternum. This technique is critical for effectively compressing the heart and circulating blood to vital organs during cardiac arrest.

When the hands are positioned on the lower half of the sternum, the force applied during compressions can efficiently compress the heart between the sternum and the spine, facilitating blood flow. The recommended depth for compressions is at least 2 inches, with a rate of 100 to 120 compressions per minute.

Other techniques, such as using only two fingers or one hand, do not provide sufficient force or depth necessary for adult compressions, which could lead to ineffective resuscitation. Furthermore, alternating with rescue breaths every 30 compressions may not align with the current CPR guidelines for adults, which typically recommend a cycle of 30 compressions followed by 2 rescue breaths, particularly in the case of a lay rescuer attempting CPR. The placement of the hands is vital to ensuring the compressions are both effective and safe, making the technique of positioning on the lower half of the sternum the correct approach for adult CPR.