Do not give breaths too rapidly or too forcefully. Doing this may cause air to be forced into the stomach, resulting in distention and less room for lung expansion. It may also cause vomiting.

To deliver mouth-to-mouth breaths, do the following:

1. Open the airway using the head-tilt/chin-lift maneuver (Figure 13a).
2. Pinch the person’s nose closed with your hand on the person’s head (Figure 13b).
3. Create a seal when using your lips to surround the person’s mouth (Figure 13c).
4. Blow into the person’s mouth for one full second and watch for chest to rise (Figure 13d). Tilt the victim’s head further back if the chest does not rise.
5. Give an additional breath for over one second.
6. If you cannot see the chest rise in two breaths, continue giving chest compressions.