4 Basic principle
1. Basic principle
1.1 Purpose
The COMBIBAG is for the manual ventilation of chil-
dren (from a body weight of 10 kg) and adults via a
face mask or endotracheal tube. The respiratory air
can be enriched with oxygen.
1.2 Function
On squeezing the bag, a volume of gas (air, air en-
riched with oxygen or pure oxygen) is forced
through the resuscitation valve into the patient’s
lungs.
As soon as the elastic bag is released, it fills up again
via the inlet valve, resuming its former shape. At the
same time, the diaphragm in the patient valve closes
the connection to the bag and opens the expiration
passage. The patient then exhales into the atmo-
sphere and expired air cannot flow back into the
bag. In case of spontaneous breathing, the patient
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