When performing CPR, what is the correct compression depth for an adult?

• A. 1-2 inches
• B. 2-3 inches
• C. 3-4 inches
• D. At least 2 inches

Answer: (D)

The correct compression depth for adults during CPR is at least 2 inches. This guideline is established based on research and clinical practice, which indicates that adequate depth is vital for generating sufficient blood flow to the heart and brain. Compressions that are too shallow do not effectively circulate blood, which can impair the chances of survival during cardiac arrest.

Providing compressions of at least 2 inches allows for effective mechanical movement of the heart and the arteries, ensuring that vital organs receive the blood they need during a cardiac emergency. The depth of compressions should also be no more than 2.4 inches to avoid causing injury to the chest or ribs, making the specified range important for both effectiveness and safety.

The other options do not meet the minimum requirement for compression depth, which can result in ineffective CPR and lower survival rates in cardiac arrest scenarios.