OFA CPR Techniques & Automated External Defibrillation (AED) 2 — Questions and Answers
Question 1: When performing CPR on an adult, what is the correct compression-to-ventilation ratio?
- 15:2
- 30:2 (Correct answer)
- 5:1
- 10:2
Correct answer: 30:2
The current standard for adult CPR is 30 chest compressions followed by 2 rescue breaths.
Question 2: How deep should chest compressions be for an adult during CPR?
- 1 to 1.5 inches
- At least 2 inches but no more than 2.4 inches (Correct answer)
- 3 to 4 inches
- As deep as possible
Correct answer: At least 2 inches but no more than 2.4 inches
Adult chest compressions should be at least 2 inches but no more than 2.4 inches to be effective without causing excessive injury.
Question 3: After delivering a shock with an AED, what should the rescuer do immediately?
- Check for a pulse for 30 seconds
- Resume CPR starting with chest compressions (Correct answer)
- Wait for the AED to recharge before doing anything
- Reposition the pads and re-analyze the rhythm
Correct answer: Resume CPR starting with chest compressions
Immediately after an AED shock, resume CPR beginning with chest compressions to circulate any restored cardiac output.
Question 4: A worker is unresponsive and not breathing normally. You have started CPR. When the AED arrives, you should:
- Stop CPR, apply pads, then turn on the AED
- Turn on the AED, apply pads, and minimize interruptions to CPR (Correct answer)
- Finish a full 2-minute CPR cycle before using the AED
- Use the AED only if CPR has failed for 5 minutes
Correct answer: Turn on the AED, apply pads, and minimize interruptions to CPR
Turn on the AED and apply pads as quickly as possible while minimizing any interruptions to chest compressions.
Question 5: Which of the following is a contraindication for placing an AED pad?
- The patient has a hairy chest
- The patient is on a wet surface
- The patient has a transdermal medication patch on the chest (Correct answer)
- The patient is obese
Correct answer: The patient has a transdermal medication patch on the chest
Transdermal medication patches must be removed and the skin wiped before placing AED pads to ensure proper shock delivery and avoid burns.
Question 6: What is the purpose of allowing full chest recoil between compressions during CPR?
- To prevent rescuer fatigue
- To allow the heart to refill with blood (Correct answer)
- To give the patient time to breathe spontaneously
- To reduce the risk of rib fractures
Correct answer: To allow the heart to refill with blood
Full chest recoil allows the heart chambers to refill with blood, which is then pumped forward with the next compression.
Question 7: In the context of AED use, what does the term 'shockable rhythm' refer to?
- Any heart rhythm detected by the AED
- Ventricular fibrillation or pulseless ventricular tachycardia (Correct answer)
- Asystole or pulseless electrical activity
- A rhythm present only in children under 8
Correct answer: Ventricular fibrillation or pulseless ventricular tachycardia
Shockable rhythms are ventricular fibrillation (VF) and pulseless ventricular tachycardia (pVT), both of which can be converted by defibrillation.
OFA CPR Techniques & Automated External Defibrillation (AED) 2
When performing CPR on an adult, what is the correct compression-to-ventilation ratio?