Definition
Blunt and/or penetrating injury to the head and/or brain due to external force, with temporary or permanent impairment in brain function which may or may not result in underlying structural changes in brain
Changes in Brain after TBI
Anatomical changes
- Intracranial lesions e.g. contusion, cerebral oedema, acute subdural haemorrhage (ASDH), Intraventricular hemorrhage (IVH)
- Skull fracture
- Scalp wound
- Facial wound
Physiological changes
- Alteration in mental state e.g. slow thinking, confusion
- Loss / reduced consciousness
- Loss of memory (amnesia) of events immediately before and / or after TBI
- Neurological deficits e.g. change in vision, sensory loss, loss of balance, body weakness
Classification
Severity of head injury
- Mild head injury: GCS 13 – 15
- Moderate head injury: GCS 9 – 12
- Severe head injury: GCS 3 – 8



