Intro: High-Quality CPR Principles for Lay Rescuers

What is the first action when arriving at a scene where someone has collapsed?

• Check that the scene is safe to enter

• Tilt the head back to open the airway

• Begin chest compressions immediately

• Call out for an AED right away

Answer explanation

Scene safety always comes first. Entering an unsafe scene can put the rescuer in danger, leaving no one to help the victim.

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Blooms Level: Remember

What is the correct compression rate for adult CPR?

• 80 to 100 compressions per minute

• 150 to 200 compressions per minute

• 60 to 80 compressions per minute

• 100 to 120 compressions per minute

Answer explanation

The correct rate is 100 to 120 compressions per minute. Going faster than 120 reduces compression quality; slower than 100 is insufficient to circulate blood.

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Blooms Level: Remember

How deep should chest compressions be on an adult?

• Exactly 3 inches (7.5 cm)

• At least 1 inch (2.5 cm)

• At least 2 inches (5 cm)

• No more than 1.5 inches (4 cm)

Answer explanation

Adult compressions must reach at least 2 inches (5 cm) to move enough blood. Shallower compressions do not adequately pump blood to the brain and heart.

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Blooms Level: Remember

Why must a rescuer allow full chest recoil between compressions?

• To keep compression depth consistent each time

• To keep the rescuer from tiring too quickly

• To let the heart refill with blood between beats

• To allow the victim to take a breath naturally

Answer explanation

Full recoil lets the chest expand so the heart can refill with blood. Without recoil, the heart stays compressed and cannot fill, reducing blood flow with each compression.

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Blooms Level: Understand

Which action best minimizes interruptions during CPR?

• Stopping compressions until the AED is fully set up

• Pausing compressions every 30 seconds to check for a pulse

• Halting compressions to deliver two full breaths every minute

• Continuing compressions while a second rescuer attaches AED pads

Answer explanation

Keeping compressions going while a partner handles the AED cuts down on pauses. Any unnecessary pause in compressions reduces blood flow to the brain and heart.

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Blooms Level: Apply

Hands-Only CPR means the rescuer performs

• Compressions with rescue breaths every 30 compressions

• Compressions only, without giving any rescue breaths

• Compressions with one breath after every 15 compressions

• Rescue breaths only, without any chest compressions

Answer explanation

Hands-Only CPR is compressions with no rescue breaths. It is appropriate for untrained rescuers or when a rescuer is unwilling to give breaths in a public setting.

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Blooms Level: Remember

Which compression habit reduces CPR effectiveness even when rate and depth are correct?

• Using two hands for adult chest compressions

• Leaning on the chest between compressions

• Switching rescuers every two minutes during CPR

• Placing hands in the center of the chest

Answer explanation

Leaning on the chest prevents full recoil, so the heart cannot refill with blood. Rate and depth can both be correct, but incomplete recoil still reduces blood flow.

Tags

Blooms Level: Understand