What is the recommended depth of compression for an infant during CPR?

The recommended depth of compression for an infant during CPR is indeed one-third of the chest depth. This guideline is crucial because the amount of force applied during chest compressions needs to be sufficient to generate blood flow without causing injury to the delicate structure of an infant's chest.

In practical terms, for infants who generally have a chest depth of approximately 1.5 to 2 inches, compressing one-third of that depth would equate to about 1 inch, which aligns with the guideline of ensuring that the compressions are adequate while remaining safe. This approach supports effective circulation and oxygenation during cardiac arrest scenarios, which is critical for the survival of an infant in such critical situations.

Regarding the other options, compressing 1 inch or 1.5 inches alone may not adequately address the individual characteristics of different infants since their size can vary significantly, and focusing on a fraction of their chest depth offers a more appropriate guideline. Compressing 2 inches is excessive for infants due to the risk of causing injury and is not recommended.