Definitions of Trauma Categories

Trauma category	Description
Combined injury	Radiation dose of >2 Gy to whole body or significant portion of whole body plus moderate or severe trauma and/or burn injury.
Severe trauma	Stabilization requires complex treatment >20% chance of death even with treatment
Moderate trauma	Without stabilization, potential for death within hours <20% chance of death with stabilization and treatment
Minimal trauma	Injuries pose no significant risk to life and limb in next 3-4 days Limited or no treatment prior to referral in the next 3-4 days