A traumatic brain injury (TBI) is a head or brain injury that results in a fundamental change in the individual’s personality, intellect, coping skills, and physical abilities. This type of injury is typically seen in injuries from car accidents and are not uncommon in injured military personnel. Because brain injuries have little chance of healing substantially the damage and deficiencies that result from a TBI is permanent and requires multiple lifestyle adjustments from both the victim and their family and friends. In recent research there have been some positive responses seen from having TBI victims use, or even sleep in, pure oxygen environments.