The Ambu (Air-Shields Manual Breathing Unit) Bag is a special type of Bag Valve Mask (or BVM) that is used to help a child or an adult who is either not breathing or having a hard time breathing on his own. It is a tool held and operated by the hand and is employed to provide a continuous supply of oxygen to a person's lungs in a process called "bagging". Bag valve mask (Ambu Bag) .The BVM consists of a flexible air chamber, about the size of an American football
ball, attached to a face mask via a shutter valve. When the face mask is properly applied and
the air chamber or "bag" is squeezed, the device forces air through into the patient's lungs;
when the bag is released, it self-inflates, drawing in ambient air or a low pressure oxygen flow
supplied from a regulated cylinder, while the patient's lungs deflate to the air through the one
way valve. Bag and valve combinations can also be attached to an alternate airway adjunct,
such as an endotracheal tube or laryngeal mask airway. A bag valve mask can be used without
being attached to an oxygen tank to provide air to the patient, often called "room air" in the
U.S. Supplemental oxygen increases the partial pressure of oxygen inhaled, helping to increase
perfusion in the patient.
Key words: BAG VALVE MASK, AMBU BAG,
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