When possible, what is the preferred method of CPR?
Compression-only
Single-person
Two-person
Rescue-breath-only
The Correct Answer and Explanation is:
Correct Answer: Two-person
Explanation:
When possible, two-person CPR is the preferred method of cardiopulmonary resuscitation (CPR), especially in healthcare or emergency settings where trained personnel are available. Two-person CPR is more effective than single-person CPR because it allows rescuers to provide high-quality chest compressions and effective ventilations without becoming fatigued too quickly.
In two-person CPR, one rescuer focuses solely on chest compressions while the second rescuer manages the airway and breathing, usually delivering ventilations with a bag-valve-mask (BVM) or mouth-to-mask technique. This division of labor ensures that both compressions and breaths are delivered efficiently and according to the recommended guidelines. Chest compressions are provided at a rate of 100 to 120 compressions per minute, with minimal interruptions, while breaths are given after every 30 compressions for adults, or 15 compressions for children and infants in the two-rescuer method.
One major advantage of two-person CPR is that rescuers can switch roles every 2 minutes to prevent fatigue, which helps maintain high-quality compressions throughout the resuscitation effort. Studies have shown that fatigue leads to shallower compressions and reduced effectiveness when CPR is performed by a single person over an extended period.
While compression-only CPR is encouraged for untrained bystanders or in situations where rescue breathing is not feasible (such as out-of-hospital sudden cardiac arrests), it is not considered the preferred method when trained personnel and equipment are available.
Rescue-breath-only CPR is not recommended, as effective circulation of oxygenated blood is critical in cardiac arrest, and this cannot be achieved with breathing alone.
In conclusion, two-person CPR offers the best outcomes when possible because it optimizes both circulation and oxygenation, reduces rescuer fatigue, and allows for seamless coordination, especially in professional or clinical settings.