Traumatic subarachnoid haemorrhage

**Definition:** Traumatic subarachnoid hemorrhage (SAH) is defined as the accumulation of blood in the space between the arachnoid membrane and the pia mater around the brain, referred to as the subarachnoid space, due to trauma (injury). SAH demonstrates as acute neurological dysfunction, and is often a devastating clinical event with substantial mortality and high morbidity among survivors.