ABSTRACT
Head injury is a common form of trauma. For example, in the UK head injury occurs in more than 500 000 people per annum of which about 10 percent are diagnosed as severe, 15 percent moderate and the remainder as minor head injury (Miller and Adams, 1992; Pickard and Czosnyka, 1993). Head trauma is a significant cause of death and disability, especially in young males (median age 30) and is associated with raised ICP. Raised ICP is defined as pressure greater than 20 mmHg and appears most commonly in about 50-75 percent of patients with severe head injury who remain comatose after resuscitation.
