A trauma in which the scalp, skull, dura mater and brain tissue are directly or indirectly connected to the outside world by a sharp or severely blunt blow or by penetration with a firearm. It is prone to intracranial infection and hemorrhage. Open craniocerebral injury: refers to head trauma, the dura mater rupture, the contents of the cranial cavity with the outside world. 24 hours intramuscular injection of TAT. surgery should repair the dura mater, open to closed to prevent intracranial infection.