What is the recommended depth of chest compressions for an adult?

What is the recommended depth of chest compressions for an adult?

• A. About 1 inch
• B. More than 3 inches
• C. At least 2 inches, but no more than 2.4 inches
• D. Any depth as long as pace is fast

Answer: (C)

High-quality adult CPR requires a specific chest compression depth to generate blood flow. The target depth is at least 2 inches (5 cm) but no more than 2.4 inches (6 cm). This range provides enough pressure to circulate blood to vital organs while minimizing the risk of injury from over-penetration. Compressions that are only about 1 inch are unlikely to generate adequate perfusion, and compressions deeper than 2.4 inches can cause harm without added benefit. Maintain full chest recoil between compressions and aim for a rate of about 100–120 compressions per minute.

High-quality adult CPR requires a specific chest compression depth to generate blood flow. The target depth is at least 2 inches (5 cm) but no more than 2.4 inches (6 cm). This range provides enough pressure to circulate blood to vital organs while minimizing the risk of injury from over-penetration. Compressions that are only about 1 inch are unlikely to generate adequate perfusion, and compressions deeper than 2.4 inches can cause harm without added benefit. Maintain full chest recoil between compressions and aim for a rate of about 100–120 compressions per minute.