What is the correct compression-to-breath ratio for a single rescuer performing CPR on an adult?

The correct compression-to-breath ratio for a single rescuer performing CPR on an adult is indeed 30:2. This ratio emphasizes the importance of maintaining high-quality chest compressions while also ensuring that ventilation is provided.

The guideline of 30 compressions followed by 2 breaths reflects the most effective method for maintaining blood circulation and oxygenation during cardiac arrest. The compressions should be performed at a rate of about 100 to 120 per minute, allowing for adequate depth and allowing full chest recoil between compressions. This emphasis on high-quality compressions is crucial, as it helps to circulate blood to vital organs and increases the chances of a successful resuscitation.

Providing two breaths after 30 compressions ensures that oxygen is delivered to the lungs, which is essential in treating a patient who is not breathing. By adhering to this ratio, the single rescuer balances the need for effective chest compressions with the provision of necessary ventilation, thereby maximizing the overall efficacy of CPR.