What is the rationale for initial CT imaging and subsequent repeat CT in TBI?

• A. Is unnecessary and does not provide new information.
• B. Initial CT identifies mass lesions and injuries requiring surgery; repeat CT monitors progression, especially if deterioration.
• C. CT imaging is used to measure blood glucose.
• D. CT is used to evaluate wound healing.

Answer: (B)

In acute traumatic brain injury, the first CT scan is done to rapidly identify injuries that could harm the patient or require urgent surgical intervention—such as hematomas, contusions, swelling, skull fractures, and signs of increased intracranial pressure. This initial image sets the trajectory for immediate management, including whether neurosurgical treatment, intensive monitoring, or specific therapies are needed.

A follow-up CT is used to watch for changes over time. Some brain injuries can expand, bleed anew, or worsen edema even after the initial injury appears stabilized. Repeating imaging, especially if the patient’s condition deteriorates or if high-risk injuries are present, helps detect delayed progression and guides decisions about further treatment or changes in care.

CT isn’t about measuring blood glucose or assessing wound healing in this context, so those aren’t the purposes of these scans.