What is the recommended depth of chest compressions in adult CPR?

The recommended depth of chest compressions in adult CPR is indeed between 2 to 2.4 inches (5 to 6 cm). This depth is critical for effective cardiopulmonary resuscitation because it allows for adequate chest compression to circulate blood during a cardiac arrest. Compressions must be deep enough to create sufficient pressure within the heart to push blood into the vital organs, particularly the brain and heart themselves.

Compressions that fall within the specified range can ensure that enough blood flow is generated while also minimizing the risk of injury or complications, such as rib fractures, that can occur with compressions that are too deep. This balance is essential in an emergency situation to maximize the chances of survival without causing additional harm to the patient.

In contrast, the other options either fall short of the recommended guideline or exceed it. The first choice, which suggests only 1 to 1.5 inches, is insufficient to achieve effective blood circulation. The third choice of 2.5 to 3 inches and the fourth option of 3.5 inches exceed the recommended limit, which could lead to potential injury and complications without significantly improving resuscitation outcomes. Thus, the standard depth specified ensures both efficacy in reviving the patient and safety by