BLS CPR Techniques & Procedures 2 — Questions and Answers
Question 1: When performing CPR on an adult, what is the correct hand placement for chest compressions?
- On the upper half of the sternum
- On the lower half of the sternum (Correct answer)
- On the left side of the chest over the heart
- Two finger-widths below the collarbone
Correct answer: On the lower half of the sternum
Compressions should be delivered to the lower half of the sternum (breastbone) to effectively compress the heart.
Question 2: What is the recommended compression-to-ventilation ratio for a lone rescuer performing CPR on a child?
- 15:2
- 30:2 (Correct answer)
- 5:1
- 15:1
Correct answer: 30:2
A lone rescuer uses 30:2 for children, the same ratio as for adults, to simplify training.
Question 3: During CPR, which of the following best describes 'full chest recoil'?
- Pressing faster than releasing
- Allowing the chest to fully rise between compressions (Correct answer)
- Pressing down at least 3 inches on each compression
- Keeping hands off the chest between each breath
Correct answer: Allowing the chest to fully rise between compressions
Full chest recoil means allowing the chest to completely return to its normal position after each compression so the heart can refill with blood.
Question 4: A rescuer notices they are delivering rescue breaths too quickly. What is the most likely consequence?
- Increased oxygen delivery to the lungs
- Gastric inflation and risk of aspiration (Correct answer)
- Faster return of spontaneous circulation
- Deeper chest compressions
Correct answer: Gastric inflation and risk of aspiration
Breaths delivered too quickly or forcefully cause air to enter the stomach, leading to gastric inflation and risk of vomiting and aspiration.
Question 5: In a two-rescuer adult CPR scenario, when should the compressor role be switched?
- Every 5 minutes
- Every 2 minutes or 5 cycles (Correct answer)
- Every 10 cycles
- Only when the compressor becomes visibly fatigued
Correct answer: Every 2 minutes or 5 cycles
Rescuers should switch the compressor role every 2 minutes (approximately 5 cycles of 30:2) to prevent fatigue and maintain compression quality.
Question 6: What is the correct head-tilt chin-lift technique used for?
- Stabilizing a suspected spinal injury
- Opening the airway by moving the tongue away from the throat (Correct answer)
- Delivering mouth-to-mouth ventilations more forcefully
- Positioning the patient for defibrillation
Correct answer: Opening the airway by moving the tongue away from the throat
Head-tilt chin-lift opens the airway by extending the neck and lifting the chin, which moves the tongue away from the back of the throat.
Question 7: Which sign indicates that a rescue breath was delivered effectively?
- The victim coughs or moves
- Visible chest rise (Correct answer)
- Air escaping from the victim's nose
- A gurgling sound from the stomach
Correct answer: Visible chest rise
Visible chest rise confirms that air entered the lungs and the breath was effective.
BLS CPR Techniques & Procedures 2
When performing CPR on an adult, what is the correct hand placement for chest compressions?