Remember that medical oxygen should not be contaminated with grease or oil; there is an associated hazard of ignition between a fuel and an oxidiser. Refer to the HazMat guidance for further information.
The use of oxygen at an incident scene will pose additional hazards because oxygen supports combustion, making non-combustible items likely to become more flammable. If the oxygen cylinder is damaged in any way during an extrication, and this results in a larger uncontrolled leak, it should be identified and managed immediately.
Further information can be found in the Casualty care section.