Delayed Intracranial Injury After Head Trauma

Critical Time Windows for Delayed Complications

Patients experiencing symptoms at 2 weeks post-injury require immediate emergency department evaluation and neuroimaging 1

Repeated vomiting or new onset vomiting is a red flag symptom requiring immediate ED evaluation at 2 weeks post-injury 2
Worsening or persistent headache beyond 24 hours is a red flag symptom requiring immediate ED evaluation at 2 weeks post-injury 1
Problems with memory or concentration are red flag symptoms requiring immediate ED evaluation at 2 weeks post-injury 2
Confusion or disorientation are red flag symptoms requiring immediate ED evaluation at 2 weeks post-injury 3
Focal neurologic deficits, such as weakness, sensory changes, or vision problems, are red flag symptoms requiring immediate ED evaluation at 2 weeks post-injury 1
Abnormal behavior or personality changes are red flag symptoms requiring immediate ED evaluation at 2 weeks post-injury 2
Increased sleepiness or difficulty arousing is a red flag symptom requiring immediate ED evaluation at 2 weeks post-injury 1

The American College of Radiology recommends MRI as the most useful imaging modality for subacute or chronic head trauma when evaluating unexplained cognitive or neurologic deficits 4
Post-concussive symptoms are expected in approximately 58% of patients at 1 month and 15% at 1 year after mild traumatic brain injury 4, 3

If the patient has any of the red flag symptoms listed above, immediate ED evaluation with neuroimaging (CT or MRI) is recommended 1, 4
Active management should begin for patients with persistent but stable post-concussive symptoms without red flags, rather than waiting for spontaneous recovery 6
Implementing sub-symptom threshold aerobic exercise with gradual increases is recommended for patients with persistent post-concussive symptoms 6
Providing systematic, individualized information about symptom management and expected recovery is recommended for patients with persistent post-concussive symptoms 6
Assessing specific domains, such as vestibular, visual, cervical, and cognitive, is recommended for patients with persistent post-concussive symptoms 6
Considering referral to a traumatic brain injury specialist is recommended for patients with persistent post-concussive symptoms 2, 7

Patients on anticoagulants or antiplatelet agents have a significantly higher risk of delayed intracranial hemorrhage 1, 7
Prolonged rest beyond the first 24-48 hours may have negative implications for recovery 6
Systematic evaluation of specific symptom domains is essential, rather than relying solely on patient self-report 6
Problems may persist for at least 6 months and require continued medical care and social assistance 8, 6