Final answer:
If an infant is unresponsive and not breathing with a strong pulse, the rescuer should reposition the head to open the airway and attempt another breath. If the chest does not rise, check for obstructions, remove if present, and deliver two more breaths. If no success, perform back blows and chest thrusts before starting CPR.
Step-by-step explanation:
If an infant is unresponsive and not breathing but has a strong pulse, and the rescuer notices that the chest does not rise after attempting to deliver breaths using the mouth-to-mouth-and-nose technique, the rescuer should recommence the breathing attempts. Before attempting to deliver another breath, the rescuer should ensure that the airway is properly opened by tilting the infant's head to a proper position and lifting the chin to clear the air passage. If this adjustment does not result in the chest rising, it may be necessary to check for any visible obstruction in the infant's mouth and, if found, carefully remove it.
After clearing the airway, the rescuer should give two more gentle breaths to the infant. If the chest still does not rise, this indicates a possible airway blockage, and the rescuer may need to perform a modified Heimlich maneuver or back blows and chest thrusts to attempt to dislodge any obstruction. Remember, it is crucial to call emergency medical services immediately if they have not already been called.
Once the obstruction is removed, the rescuer should commence CPR if the infant remains unresponsive and not breathing, focusing on high-quality chest compressions in addition to rescue breaths if certified to do so. Proper CPR can maintain the flow of blood until the heart resumes beating or medical help arrives. Following the correct CPR guidelines and techniques is essential to increase the chances of a successful resuscitation.