What is the appropriate emergency department evaluation and management for a patient with a suspected severe concussion (loss of consciousness >30 minutes, post‑traumatic amnesia >24 hours, focal neurological deficits, or worsening mental status)?

Severe Concussion Emergency Department Evaluation and Management

For a patient with suspected severe concussion (loss of consciousness >30 minutes, post-traumatic amnesia >24 hours, focal neurological deficits, or worsening mental status), immediately obtain a non-contrast head CT scan and assess using the Glasgow Coma Scale motor component plus pupillary examination, while simultaneously correcting any systemic factors like hypotension or hypoxia that could worsen brain injury. 1

Initial Clinical Assessment

The cornerstone of evaluation is the Glasgow Coma Scale (GCS), specifically focusing on the motor response component, combined with pupillary size and reactivity 1. This approach is validated by the IMPACT and CRASH studies involving over 15,000 patients and remains the strongest predictor of 6-month neurological outcome. The motor component is particularly valuable because it remains assessable even in sedated or intubated patients, unlike the eye and verbal components which are often obscured by necessary interventions.

Key Clinical Parameters to Document:

• Motor response score (most robust predictor)
• Pupillary size, symmetry, and light reactivity (bilateral assessment)
• Age (independent prognostic factor)
• Vital signs, particularly blood pressure and oxygen saturation

Immediate Imaging

Non-contrast head CT is the imaging modality of choice for severe head trauma 2. The features you describe (LOC >30 minutes, PTA >24 hours, focal deficits, worsening mental status) all mandate immediate CT imaging to detect neurosurgical lesions including hemorrhage, herniation, and hydrocephalus.

Critical Management Priorities

Prevent Secondary Brain Injury

Aggressively correct systemic factors that cause secondary cerebral insults 1:

• Hypotension: Maintain systolic blood pressure ≥90 mmHg (even brief episodes of SBP <90 mmHg for 5 minutes significantly worsen outcomes)
• Hypoxia: Ensure adequate oxygenation
• Hypercapnia/hypocapnia: Monitor and optimize ventilation if intubated
• Hyperthermia: Control fever
• Hypoglycemia/hyperglycemia: Maintain glucose homeostasis

Serial Neurological Examinations

Repeat neurological assessments frequently to detect deterioration 1. While the exact interval is at physician discretion, evidence-based protocols suggest:

• Every 15-30 minutes for the first 2 hours
• Then hourly for at least 12-24 hours
• Any decrease of ≥2 points in GCS or new neurological deficit mandates repeat CT imaging 1

This is critical because patients with your described severity are at substantial risk for secondary deterioration.

Common Pitfalls to Avoid

1. Don't rely solely on total GCS score - the motor component is more predictive and remains assessable in intubated patients 1

2. Don't miss hypotension - even transient episodes dramatically worsen outcomes, yet this is frequently overlooked in the acute phase 1

3. Don't delay imaging - the features described (LOC >30 min, PTA >24 hrs, focal deficits, worsening status) all indicate high risk for surgical lesions requiring urgent intervention 2

4. Don't perform a single examination - deterioration can occur hours after initial presentation, requiring vigilant serial monitoring 1

Neurosurgical Consultation

Given the severity indicators you've described, early neurosurgical consultation is warranted even before CT results if there are focal deficits or rapidly declining mental status. The management framework emphasizes that severe TBI requires multidisciplinary involvement from the outset 1.

Additional Monitoring Considerations

For patients meeting severe TBI criteria, consider:

• Intracranial pressure monitoring (indications per neurosurgery)
• Seizure prophylaxis evaluation
• Osmolarity and metabolic monitoring
• Cervical spine imaging if mechanism suggests possible injury 2

The evidence strongly supports that outcomes in severe TBI are determined in the first 24 hours by how aggressively you prevent secondary injury while identifying surgical lesions 1.