CPR Chest Compressions & Defibrillation 2 — Questions and Answers
Question 1: What is the recommended depth of chest compressions for an adult during CPR?
- At least 2 inches (5 cm) (Correct answer)
- About 1 inch (2.5 cm)
- At least 3 inches (7.5 cm)
- As deep as possible past 2.4 inches
Correct answer: At least 2 inches (5 cm)
Adult compressions should be at least 2 inches (5 cm) but not exceeding 2.4 inches (6 cm).
Question 2: What is the recommended rate of chest compressions for adult CPR?
- 100 to 120 compressions per minute (Correct answer)
- 60 to 80 compressions per minute
- 140 to 160 compressions per minute
- Exactly 90 compressions per minute
Correct answer: 100 to 120 compressions per minute
Compress at a rate of 100 to 120 per minute to maintain effective blood flow.
Question 3: Why is it important to allow full chest recoil between compressions?
- It lets the heart refill with blood (Correct answer)
- It conserves rescuer energy
- It prevents rib fractures
- It speeds up the compression rate
Correct answer: It lets the heart refill with blood
Full recoil allows the heart to refill, improving blood flow on the next compression.
Question 4: Where should your hands be placed for adult chest compressions?
- Center of the chest on the lower half of the breastbone (Correct answer)
- Over the left nipple directly above the heart
- On the upper third of the sternum
- Over the soft area below the rib cage
Correct answer: Center of the chest on the lower half of the breastbone
Place the heel of your hand on the lower half of the sternum at the center of the chest.
Question 5: What is the compression-to-ventilation ratio for one-rescuer adult CPR?
- 30 compressions to 2 breaths (Correct answer)
- 15 compressions to 2 breaths
- 5 compressions to 1 breath
- 10 compressions to 2 breaths
Correct answer: 30 compressions to 2 breaths
Single-rescuer adult CPR uses a 30:2 compression-to-ventilation ratio.
Question 6: What should you do to minimize interruptions during compressions?
- Limit pauses to less than 10 seconds (Correct answer)
- Stop every minute to check breathing
- Pause for 30 seconds between cycles
- Stop compressions while attaching AED pads
Correct answer: Limit pauses to less than 10 seconds
Interruptions should be kept under 10 seconds to maintain perfusion.
Question 7: What is a common cause of ineffective chest compressions?
- Leaning on the chest and not allowing recoil (Correct answer)
- Compressing too slowly on purpose
- Using two hands instead of one
- Counting compressions aloud
Correct answer: Leaning on the chest and not allowing recoil
Leaning prevents full recoil, reducing how much blood the heart can pump.
CPR Chest Compressions & Defibrillation 2
What is the recommended depth of chest compressions for an adult during CPR?