During CPR, how should chest compressions be performed on an infant?

During CPR for an infant, chest compressions should be performed using two fingers placed in the center of the chest just below the nipple line. This method is important because it allows for effective compression of the chest while minimizing the risk of injury to the baby's fragile ribcage and internal organs.

The reason for using two fingers is that an infant's chest is smaller and more delicate than that of an adult, and using a firm but gentle technique is crucial for providing adequate blood flow without causing harm. Compressions should be delivered at a rate of about 100 to 120 compressions per minute, and the depth of the compressions should be approximately one-third the depth of the chest, which typically equates to about 1.5 inches.

Using one hand or both hands interlocked, as suggested in some other options, is more appropriate for larger children and adults where more strength is needed. Performing chest compressions with a foot on the chest is not an accepted practice and could be dangerous and ineffective. Thus, using two fingers is the proven and best approach for performing CPR on infants.