Management of Traumatic Brain Injury – Evidence‑Based Recommendations
Initial Assessment and Imaging
Prevention of Secondary Brain Injury
Hemodynamic Management
Airway and Ventilation
Transfer and Specialized Care
Monitoring Strategies
Neurological Monitoring
Advanced Monitoring
Management of Intracranial Hypertension
Neurosurgical Indications
- Symptomatic extradural hematoma,
- Acute subdural hematoma > 5 mm thickness with midline shift > 5 mm,
- Acute hydrocephalus,
- Displaced open skull fracture. 3
Critical Pitfalls to Avoid
Management of Traumatic Brain Injury
Initial Assessment and Classification
- The American College of Surgeons recommends that TBI severity is primarily assessed using the Glasgow Coma Scale (GCS), with severe TBI defined as GCS < 9, requiring immediate intensive management 4, 5
- Brain and cervical computed tomography (CT) scan should be performed without delay in severe TBI patients to identify primary brain lesions and guide neurosurgical interventions 4, 5
- Transcranial Doppler (TCD) measurements on arrival can be useful to assess cerebral perfusion, with concerning findings including diastolic blood flow velocity < 20 cm/s and pulsatility index > 1.4 4
- Biomarkers (S100b, NSE, UCH-L1, GFAP) are not recommended for routine clinical assessment of TBI severity 5, 6
Pre-hospital Management
- Patients with severe TBI should be managed by a specialized pre-hospital medical team and transferred as quickly as possible to centers with neurosurgical capabilities 4, 5
- Systolic blood pressure should be maintained > 110 mmHg prior to measuring cerebral perfusion pressure to ensure adequate cerebral perfusion 6
- Target an EtCO2 between 30-35 mmHg prior to obtaining arterial blood gases to guide ventilation adjustments 5
Imaging Strategy
- Immediate brain and cervical CT scan with inframillimetric sections and double fenestration (central nervous system and bones) is the reference standard for TBI assessment 4, 5
- Consider early CT-angiography of supra-aortic and intracranial arteries in patients with risk factors for vascular injury 5, 6
- Serial imaging may be necessary to monitor progression of injuries and guide ongoing management 5
Management of Increased Intracranial Pressure (ICP)
- Implement standard ICP management including restriction of free water, avoidance of excess glucose, minimization of hypoxemia and hypercarbia, treatment of hyperthermia, and elevation of head of bed to 20-30° 7
- Control ventilation to maintain appropriate PaCO2 levels through mechanical ventilation 7
- External ventricular drainage should be performed for persistent intracranial hypertension despite sedation and correction of secondary brain insults 7
- Osmotic diuretics such as mannitol (0.25-0.5 g/kg IV over 20 minutes every 6 hours, maximum 2 g/kg) can be used to reduce ICP 7
- Hypertonic saline is effective for patients with clinical transtentorial herniation 7
- For intubated patients, mild hyperventilation targeting PaCO2 of 30-35 mmHg can temporarily reduce ICP, though benefits are short-lived 7
- Consider decompressive craniectomy for refractory intracranial hypertension following multidisciplinary discussion 7
Important Considerations
- Corticosteroids are NOT recommended for TBI management as they have failed to demonstrate beneficial effects on mortality or neurological outcomes 7
- Meta-analyses show no difference in mortality risk between dexamethasone treatment and control groups (RR 1.14, 95% CI 0.91-1.42), with some studies suggesting potential harm 7
- In patients with concomitant traumatic brain injury and chest trauma, maintaining PaCO₂ between 35-40 mmHg after stabilization is crucial to prevent cerebral vasoconstriction 8
- Avoid hyperoxia after stabilization while ensuring adequate oxygenation during the acute phase 8
- Consider other causes of shock in trauma patients, including hemorrhagic shock, which may require additional interventions 8
Initial Stabilization and Early Management of Traumatic Brain Injury
Hemodynamic and Respiratory Targets
- Maintain systolic blood pressure ≥ 110 mmHg in all TBI patients; episodes of SBP < 90 mmHg markedly increase mortality. 9
- Keep arterial oxygen saturation > 90 % (ideally > 95 %); hypoxemia is linked to poorer neurological outcomes at 6 months. 10
- The simultaneous presence of hypotension and hypoxemia results in a 75 % mortality rate. 9
Severity Classification (Glasgow Coma Scale)
- Classify TBI severity immediately using the GCS: severe ≤ 8, moderate 9‑13, mild 14‑15. 11
- For mild TBI (GCS 14‑15), selective head CT is indicated only when specific risk factors are present. 12
Indications for Immediate Head and Cervical CT Imaging
- Perform an urgent brain and cervical spine CT in:
Airway Management
- Intubate without delay in patients with GCS ≤ 8, inability to protect the airway, irregular breathing, or refractory hypoxemia. 12
- After intubation, target an end‑tidal CO₂ of 30‑35 mmHg before obtaining arterial blood gases to guide ventilation. 12
Transfer to Specialized Neurosurgical Care
- Transfer all severe and moderate TBI patients immediately to a facility with neurosurgical capability and neuro‑intensive care; this improves survival and neurological outcomes even when surgery is not required. 12
- Pre‑hospital management should be performed by a specialized medical team. 12
Neurological Monitoring Protocol for Moderate TBI
- Conduct serial neurological examinations: every 15 minutes for the first 2 hours, then hourly for the next 4‑12 hours. 10
- Obtain an immediate repeat head CT if any of the following occur:
Advanced Monitoring – Transcranial Doppler Ultrasonography
- Consider bedside transcranial Doppler on arrival; concerning findings include:
- These Doppler parameters predict poor outcomes and can guide early therapeutic interventions. 9