🔍 Key Concepts

• Adult CPR compression depth as taught in current AHA (American Heart Association) guidelines • Difference between adult vs infant/child CPR compression depths • Why proper compression depth is critical for effective blood circulation

💭 Think About

• Which answer choices look more appropriate for the size and chest thickness of an average adult? • Think about what happens if compressions are too shallow versus too deep— which range is most likely to create enough blood flow without causing excessive injury? • Recall standard CPR teaching: is adult depth usually measured in fractions of an inch or in a range around 2 inches?

✅ Before You Answer

• Confirm which option most closely matches the current standard adult CPR depth you’ve learned in first-aid/CPR courses. • Eliminate any depths that seem too shallow to effectively compress an adult heart between the sternum and spine. • Make sure you are not confusing infant/child compression depth (usually described as a fraction of the chest’s depth) with the specific inch range used for adults.