Head injury guideline. The adult trauma clinical practice guideline Initial Management of Closed Head Injury in Adults, 2nd Edition is one of four guidelines published by NSW ITIM. It consists of 5 documents: Full report - the complete guideline including algorithms, discussions, tables of . Jan 22, · This management guideline is based on ACEP’s Clinical Policy for adult mild traumatic brain injury (MTBI) External, which revises the previous Clinical Policy. The policy focuses on identifying neurologically intact patients who have potentially significant intracranial injuries, and identifying patients with risk for prolonged.