Cardiopulmonary Resuscitation (CPR) Practice 2025 - Free CPR Practice Questions and Study Tips.

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How deep should chest compressions be for adults?

At least 1 inch (2.5 cm) deep

At least 1.5 inches (3.8 cm) deep

At least 2 inches (5 cm) deep

Chest compressions for adults should be performed at a depth of at least 2 inches (5 cm). This depth is crucial because adequate compression allows for effective blood flow during a cardiac arrest situation. Compressing the chest to this depth ensures that the heart is adequately squeezed, creating enough pressure to circulate blood to vital organs, particularly the brain and heart.

Research has shown that compressions deeper than the 2-inch standard may not significantly improve survival rates and can potentially lead to increased risk of injury. Therefore, striving for that depth of 2 inches is a balance between effectiveness and safety. It is also important for compressions to be delivered at a rate of 100 to 120 compressions per minute to optimally support circulation until advanced medical help arrives.

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At least 2.5 inches (6.4 cm) deep

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