Insufflation, also known as 'rescue breaths' or 'ventilations', is the act of mechanically forcing air into a patient's respiratory system.

A study found that giving rescue breaths too quickly can adversely affect survival, the heart association spokeswoman said.

B: Breathe Kneeling perpendicular to the victim, administer two rescue breaths.

After every 30 chest compressions give two rescue breaths in adult and child victim, Continue for five cycles or two minutes before re-assessing pulse.

Again she gave two slow rescue breaths, then Paul began compressions.

If you feel comfortable doing CPR with rescue breaths, then use them.

You can use the mask to give rescue breaths, but don't delay starting CPR to find one.

If you are trained in CPR, give 30 compressions, then 2 rescue breaths.

Repeat the cycle of 30 compressions and 2 rescue breaths until help arrives or the person is breathing normally.

Between rescue breaths, remove your mouth from the person's mouth and take a normal breath.