f. Begin Ventilations. Perform ventilations by squeezing the bag with the hand
that is not holding the mask in place (figure 2-13).
Squeeze two breaths lasting about 1 second each into the bag.
(2) Thereafter, use your other hand to squeeze the bag in a rhythmical
manner once every five seconds to give a rate of about twelve breaths per minute.
(3) An oxygen source may be attached to the mask if available and ordered
by a physician.
(4) A reservoir bag should be used with the BVM to help obtain nearly 100%
When the BVM system is used to assist the breathing of a spontaneously
breathing patient, time the ventilations so they will coincide with the patient's
inhalations by observing the rise and fall of his chest. Try to obtain a more
normal rate and depth of respirations.
g. Check for Effectiveness. Observe the patient's chest to see if it rises and
falls. If the chest does not rise and fall, reopen or clear the airway. If the rising and
falling chest movement is observed, continue to ventilate the patient.
h. Continue Ventilations. Continue to ventilate the patient at a rate of one
breath every five seconds until spontaneous breathing returns. When the patient begins
to breathe on his own again, time your ventilations to correspond to the patient's
inhalations. Continue until the patient's respirations attain a normal rate and depth or
until you are ordered to stop by a physician.
i. Evacuate, if Needed. In a field situation, you may need to prepare a Field
Medical Card and evacuate the patient for further evaluation and treatment by a
physician. Maintain adequate ventilation en route, if necessary.