When evaluating personnel for traumatic brain injury in the field, which sign indicates the need for imaging?

• A. Normal gait and full memory
• B. Altered mental status and orientation changes
• C. Clear speech and stable vital signs
• D. Absence of headache

Answer: (B)

Altered mental status and changes in orientation are red flags for possible brain injury in the field. When brain function is disrupted—whether someone is confused, disoriented, forgetful, slow to respond, or unresponsive to questions—that points to potential intracranial pathology such as hemorrhage or swelling. Imaging is used to look for these problems and guide immediate management and evacuation.

In contrast, signs like normal gait and full memory suggest more preserved brain function at that moment, and while reassuring, they don’t reliably rule out injury. Clear speech and stable vital signs are also encouraging but can occur even when intracranial injury is present, so they aren’t alone sufficient to rule out the need for imaging. Absence of headache is not a dependable indicator either; brain injuries can occur without headaches, especially early on.

So, when there’s altered mental status or orientation changes after a head impact, imaging becomes the appropriate next step to assess for intracranial injury.