In a patient who fell and hit her head four days ago, with no loss of consciousness, now experiencing brain fog, headache, and dizziness but a normal neurological examination and unchanged vision, should I obtain a non‑contrast head CT?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: September 8, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

CT Head is Indicated in This Patient

Based on the 2008 ACEP Clinical Policy guidelines, you should obtain a non-contrast head CT in this patient despite the normal neurological examination. 1

Clinical Decision Rule Application

This patient meets criteria for imaging under the Level B recommendation for patients with head trauma without loss of consciousness. Specifically, she has:

  • Severe headache (one of the qualifying criteria)
  • Vomiting/dizziness symptoms
  • Presentation 4 days post-injury (still within the acute phase where delayed intracranial hemorrhage can manifest)

The ACEP guidelines explicitly state that CT should be considered in patients with no LOC or post-traumatic amnesia if they have severe headache, vomiting, or other high-risk features 1.

Why Normal Neuro Exam Doesn't Rule Out Pathology

A normal neurological examination cannot reliably exclude intracranial injury in head trauma patients. Research demonstrates that:

  • 18.4% of mild head injury patients with relatively normal neurological examinations had intracranial lesions on CT 2
  • 5.5% required surgical intervention despite near-normal mental status 2
  • Even refined neurological assessments miss significant pathology that CT readily detects 2

The ACR Appropriateness Criteria emphasize that patients with normal CT but persistent symptoms beyond 24 hours warrant consideration of imaging, particularly when symptoms include headache and cognitive complaints 1.

Critical Timing Consideration

The 4-day timeframe is particularly important. While most acute traumatic findings present immediately, delayed intracranial hemorrhage can occur within the first week post-injury. The guidelines specifically address short-term follow-up imaging in the acute phase (0-7 days) 1.

Common Pitfall to Avoid

Do not be falsely reassured by the normal neurological examination. The combination of persistent symptoms (headache, brain fog, dizziness) at 4 days post-injury warrants imaging regardless of examination findings. The risk of missing a surgically significant lesion outweighs the radiation exposure in this clinical scenario 1.

References

1
Guideline

acr appropriateness criteria® head trauma: 2021 update.

Journal of the American College of Radiology, 2021

Related Questions

A 14-year-old field hockey player with a concussion who is currently symptomatic—can she travel with her team to a tournament in two weeks but not participate in any games, and when is she allowed to return to play?
In a 64-year-old woman with a history of cervical spine herniations who fell three times three weeks ago without head impact and now presents with neck pain and recurrent occipital and frontal headaches, what is the appropriate imaging study to obtain?
What is the indication for a CT scan of the head in a patient with a history of loss of consciousness, moderate headache, and two episodes of vomiting after a fall?
What is the recommended assessment, treatment, and stepwise return-to-activity protocol for a patient with a concussion?
A 14-year-old female athlete with a SCAT-5 score of 6 after a concussion has a field hockey game scheduled in two weeks; what is the appropriate return-to-play recommendation?
What alternative oral medication can be used to treat an uncomplicated urinary tract infection in a patient allergic to nitrofurantoin?
In a patient taking ezetimibe 10 mg daily who develops new‑onset leg cramps, what is the appropriate evaluation and management?
Can a single dose of ketorolac (Toradol) cause renal failure?
In a patient on Losartan 100 mg daily and hydrochlorothiazide 25 mg daily who still has blood pressure 177/110 mm Hg, how should the hypertension be managed?
Is it appropriate to prescribe Augmentin (amoxicillin/clavulanate) 875 mg/125 mg twice daily for 7 days to a 64.3 kg child with acute otitis media?
What are the next steps for a patient with a low TSH (0.15 µIU/mL), normal free T4 (1.2 ng/dL), elevated resting heart rate, and occasional palpitations?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.