Final answer:
When a 3-month-old infant is not breathing and has no pulse, begin pediatric CPR immediately by performing chest compressions and rescue breaths, and call for EMS.
Step-by-step explanation:
If you arrive to a scenario where a 3-month-old is not breathing, appearing limp and gray in color, and you cannot find a brachial pulse, the first step is to begin pediatric CPR. This process involves performing chest compressions and giving rescue breaths. Since the infant is already in a state of cardiac arrest indicated by the lack of pulse and breathing, immediate action is crucial to try and restore circulation and breathing.
- Call for emergency medical services (EMS) or instruct someone else to do so immediately.
- Perform CPR with a ratio of 30 chest compressions to 2 rescue breaths. Compressions should be done using two fingers in the center of the infant's chest, just below the nipple line.
- Continue CPR until the infant responds or emergency medical personnel take over.
It's critical that anyone who cares for infants have training in infant CPR to effectively perform these lifesaving measures.