Flail chest is rare but may be suspected in cases of multiple rib fractures. Flail chest is the result of 2 or more adjacent ribs that are fractured in 2 or more places.
The affected area breaks away from the rib cage and moves in the opposite direction to the rest of the rib cage during inspiration and expiration.
As a first aider, it is hard to recognise whether the patient had a broken rib or if they in fact have a flail chest. It is advised that the first aider: