Final answer:
2-person bag mask ventilation may be necessary when the child has a pulse but is not breathing effectively or not breathing at all.
Step-by-step explanation:
2-person bag mask ventilation may be necessary when:
- The child has a pulse but is not breathing effectively.
- The child is not responsive.
- The child has a pulse but is not breathing at all.
This method involves one rescuer using a bag mask device to deliver a combination of air and oxygen to the child's lungs. It is typically used when the child is not breathing effectively or not breathing at all, but still has a pulse. In these situations, it is important to provide immediate ventilation to the child in order to maintain oxygenation and circulation.