How deep should chest compressions be for adults?

• A. At least 1 inch (2.5 cm) deep
• B. At least 2 inches (5 cm) deep
• C. At least 3 inches (7.5 cm) deep
• D. At least 4 inches (10 cm) deep

Answer: (B)

The recommended depth for chest compressions in adult victims of cardiac arrest is at least 2 inches (5 cm) deep. This depth is crucial for effectively generating adequate blood flow during cardiopulmonary resuscitation (CPR). Proper depth ensures that the heart is compressed enough to create sufficient pressure for blood circulation, optimizing the chances of perfusion to vital organs.

Compressions at this depth allow for a strong enough force to circulate blood without causing undue harm to the chest, balancing efficacy with safety. Additionally, aiming for a depth less than 2 inches may not generate enough pressure to maintain sufficient blood flow, while compressions deeper than 2 inches can lead to complications such as rib fractures and potential injury to internal organs. Hence, maintaining compressions in the range of 2 to 2.4 inches is essential for effective CPR.