What is the minimum depth of chest compressions in CPR to be effective?

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Prepare for the ATP 4-02.11 – First Aid Exam. Study with flashcards and multiple choice questions, each question includes hints and explanations. Get ready for your exam!

Multiple Choice

What is the minimum depth of chest compressions in CPR to be effective?

Explanation:
Generating enough blood flow during CPR hinges on compressing the chest to a depth that reliably squeezes the heart. For adults, the minimum depth that achieves this is about 2 inches (5 cm). Compressing only 1 inch doesn’t create enough pressure to circulate blood effectively, so it’s not adequate. Deeper depths like 2.5 inches or 3 inches are not required to meet the minimum and carry a higher risk of injury, even though they can still be effective; what matters for the minimum is reaching that 2-inch depth.

Generating enough blood flow during CPR hinges on compressing the chest to a depth that reliably squeezes the heart. For adults, the minimum depth that achieves this is about 2 inches (5 cm). Compressing only 1 inch doesn’t create enough pressure to circulate blood effectively, so it’s not adequate. Deeper depths like 2.5 inches or 3 inches are not required to meet the minimum and carry a higher risk of injury, even though they can still be effective; what matters for the minimum is reaching that 2-inch depth.

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