Consists of a bag, adapter and one-way valve. The bag is the main part of the device. It can be attached directly to an endotracheal tube or a mask using the adapter. Provide assisted ventilation to people who are either not breathing or are having trouble breathing. The bag needs to be compressed to force a volume of air into the lungs The bag also has a one-way valve which allows the oxygen to flow to the patient and prevents the patient from breathing in his exhaled air. Some bags may have a reservoir, which increases the amount of oxygen the patient receives.
