how long should each rescue breath last?
1 After giving 30 chest compressions, open the airway and give 2 rescue breaths. 2  Each rescue breath should last about 1 second and make the chest clearly rise. 3  Use the head-tilt/chin-lift technique to ensure that the childâs airway is open. 4  Continue cycles of 30 chest compressions and 2 rescue breaths.