(3) The compressor rescuer must keep his compressions regular and keep
track of compression by counting out loud, "one and two and three and four and five
and...." He must also push fast and hard to ensure a fast enough rate of compressions
and adequate depth.
(a) The compressor rescuer pushes down on the sternum when he
says a number.
The compressor rescuer releases the pressure when he says,
e. Administer Two Breaths. After the compressor rescuer says "thirty," the
ventilator rescuer blows two breaths into the casualty's mouth (or nose). This must be
done while the chest compression is in the "release" portion. If the ventilator rescuer
blows air into the casualty's lungs while the compressor rescuer is performing the
"push" portion of a chest compression, the actions would interfere with each other and
be inefficient. Each ventilation should take about 1 second.
f. Continue Cardiopulmonary Resuscitation Cycles. After the ventilator
rescuer administers the ventilations, the compressor rescuer administers 30 more chest
compressions. Although there is a slight break between the last compression of a cycle
and the first compression of the next cycle to allow for the ventilation, the compressor rescuer
should not remove his hands from the casualty's chest between cycles. While the
compressor rescuer is delivering compressions, the ventilator rescuer feels the
casualty's pulse to ensure that the compressions are being effective. Both rescuers
continue administering two-rescuer CPR cycles until 5 cycles have been administered.
Each two-rescuer CPR cycle (sometimes called a 30:2 cycle) consists of thirty chest
compressions followed by two full ventilations. At this rate, a casualty will actually
receive about 150 compressions and 10 breaths after two minutes.
g. Check for Spontaneous Pulse and Respiration. After the first five cycles
(2 minutes), the compressor rescuer stops administering compressions and the
ventilator rescuer checks for spontaneous pulse and respiration. The check should take
about 5 seconds.
(1) If the casualty has spontaneous heartbeat and respiration, the ventilator
rescuer informs the compressor rescuer that the casualty is breathing on his own. The
compressor rescuer then checks the casualty for injuries while the ventilator rescuer
continues to maintain the casualty's airway and monitor the casualty's respirations and
(2) If the casualty's heart is beating on its own, but the casualty is not
breathing on his own, then the ventilator rescuer informs the compressor rescuer of the
situation and begins administering rescue breathing. The compressor rescuer then
checks for other injuries. If the casualty's pulse stops again, two-rescuer CPR is