Final answer:
In two-rescuer infant CPR, one rescuer performs bag-valve-mask breathing while another does chest compressions. Compressions are done at a rate of 100 per minute, mirroring the rhythm of the song 'Staying Alive.' The breath should be delivered at 20-30 breaths per minute.
Step-by-step explanation:
When administering CPR for an infant with two rescuers, one rescuer should be at the child's head handling bag-valve-mask resuscitation, while the other remains at the foot of the patient to perform compressions. The location of the heart between the sternum and the vertebrae in the thorax is such that manual chest compressions can effectively propel blood through the systemic and pulmonary circuits, which is vital to prevent brain damage due to lack of oxygen.
Current CPR guidelines advise compressions of at least 5 cm deep at a rate of 100 per minute. Infant CPR specifically requires more delicate handling and precise technique. The rescuer at the head should deliver breaths via the bag-valve-mask at a rate of one breath every 2-3 seconds or 20-30 breaths per minute for an infant without a pulse. Synchronization with the compressor, which should use two fingers in the center of the chest just below the nipple line, is essential. This process continues until medical assistance arrives or the baby shows signs of life.