How should chest compressions be performed on an infant by a single rescuer?

Chest compressions on an infant should be performed using two fingers just below the nipple line. This method is essential because it allows for effective compression of the infant's chest without exerting excessive force. The two-finger technique helps to ensure that the compressions are both deep and adequate to circulate blood effectively while minimizing the risk of injury to the fragile ribcage and vital organs of the infant.

The recommended depth for compressions in infants is about one-third the depth of the chest, which is why the two-finger technique is preferred. It also enables the rescuer to maintain a consistent rhythm of compressions, approximately 100 to 120 compressions per minute, which is crucial for optimizing perfusion during a cardiac event. Additionally, this technique allows for easier coordination with rescue breaths if needed, as it leaves the other hand free to maintain an open airway.

Other methods, such as using the heel of the hand, are more suitable for larger patients and may not provide the necessary control or effectiveness in smaller infants. Using a single hand or compressing only the tip of the breastbone could lead to inadequate depth of compressions or a focus on an incorrect area of the chest. Therefore, performing compressions with two fingers just below the nipple line