Final answer:
In CPR, a single rescuer should use a compression-to-ventilation ratio of 30 compressions to 2 breaths for victims of any age.
Step-by-step explanation:
The correct compression-to-ventilation ratio for single rescuers performing CPR on victims of any age is 30 compressions to 2 breaths. When administering CPR, it is essential to compress the chest at least 5 cm deep and at a rate of 100 compressions per minute. This ratio is critical for maintaining blood flow, especially to the brain, as a lack of blood flow can result in irreversible damage to neurons in a matter of minutes.
The recommended technique involves pressing on the sternum between the T4 and T9 vertebrae to effectively circulate blood through the pulmonary and systemic circuits. Single rescuers should use the compression-to-ventilation ratio of 30 compressions to 2 breaths when giving CPR to victims of any age.