d. Blow a small puff of air (only enough to make his chest rise) into the
casualty's mouth and nose. Observe the chest out of the corner of your eye as you
administer the breath.
e. After blowing into the casualty's mouth and nose, break the seal over his face
and allow air to escape. His chest should fall somewhat as air escapes after you break
the seal. You may be able to hear or feel the exhaled breath also.
f. Take another breath, seal your mouth over the casualty's mouth and nose
again, and administer a second puff of air. It should take about one second to
administer each breath.
EVALUATE THE EFFECTIVENESS OF THE VENTILATIONS
a. If the casualty is now breathing on his own, maintain his airway and examine
the casualty for injuries. Be prepared to administer rescue breathing or CPR should the
casualty stop breathing again.
b. If your ventilations made the casualty's chest rise but the casualty is not
breathing on his own, check his pulse (paragraph 6-5).
c. If your ventilations did not make the casualty's chest rise, reposition the
casualty's head and administer two puffs of air again.
(1) If your second attempt is successful, check the casualty's pulse
(2) If your second attempt still does not cause the casualty's chest to rise,
the casualty probably has something blocking his airway. Remove the obstruction using
the procedures given in lesson 7.
CHECK FOR PULSE
If the casualty is a child, check for a pulse at the carotid artery (same location as
in an adult). If the casualty is an infant, however, you may have trouble locating the
carotid pulse due to the casualty's short, chubby neck. Therefore, the brachial artery is
usually used to feel for an infant's pulse. The brachial pulse is taken on the inside of the
casualty's inner arm between the elbow and the shoulder (figure 6-3). Use only two
fingers (no thumb) to gently press on the artery. The check should take between 5 and
10 seconds. Continue to monitor the casualty for signs of spontaneous breathing as
you check for a pulse.