What is the evidence‑based management of traumatic brain injury in an adult patient without known contraindications?

Management of Traumatic Brain Injury

Immediate airway control with tracheal intubation, mechanical ventilation, and end-tidal CO2 monitoring is the first priority in severe TBI, maintaining systolic blood pressure >110 mmHg while avoiding hypocapnia to prevent cerebral ischemia. 1

Initial Resuscitation and Stabilization

Airway and Ventilation Management

• Perform pre-hospital tracheal intubation for severe TBI patients to decrease mortality 1
• Monitor end-tidal CO2 continuously to ensure proper tube placement and maintain PaCO2 in normal range 1
• Avoid hypocapnia (PaCO2 <35 mmHg) - it causes cerebral vasoconstriction and worsens ischemia 1
• Target normocapnia; prolonged hypocapnia worsens neurological outcomes 1

Hemodynamic Management

• Maintain systolic blood pressure >110 mmHg before measuring cerebral perfusion pressure 1
• Even a single episode of hypotension (SBP <90 mmHg) significantly worsens outcomes 1
• Use vasopressors (phenylephrine, norepinephrine) immediately for hypotension rather than waiting for fluid resuscitation or sedation adjustment 1
• Avoid 4% albumin solutions - associated with increased mortality in severe TBI 1
• Target euvolemia without hypotension 2

Imaging

• Obtain non-contrast head CT immediately for any patient with coma or abnormal neurological exam 1
• Use double fenestration (brain and bone windows) with inframillimetric sections 1
• Perform CT angiography if risk factors for vascular injury present:
  • Cervical spine fracture
  • Focal deficit unexplained by brain imaging
  • Horner syndrome
  • LeFort II/III facial fractures
  • Basilar skull fractures
  • Neck soft tissue injury 1

Intracranial Pressure Management

ICP Monitoring

• Monitor ICP in severe TBI patients to detect intracranial hypertension 1
• Treatment threshold: ICP >20 mmHg 1

Cerebral Perfusion Pressure Targets

• Maintain CPP 60-70 mmHg in adults 1
• CPP <60 mmHg associated with poor outcomes 1
• CPP >90 mmHg may worsen vasogenic edema 1
• Tailor CPP targets based on autoregulation status when available:
  • Impaired autoregulation: prioritize ICP control (lower CPP ~60 mmHg)
  • Preserved autoregulation: higher CPP targets (>70 mmHg) 1

Medical Management of Elevated ICP

First-line therapy:

• Adequate sedation and correction of secondary brain insults 1
• Osmotherapy with mannitol 20% or hypertonic saline at 250 mOsm dose, infused over 15-20 minutes 1
  • Both equally effective at equiosmotic doses
  • Mannitol causes osmotic diuresis requiring volume replacement
  • Hypertonic saline risks hypernatremia and hyperchloremia
  • Monitor fluid, sodium, and chloride balance closely 1

Sedation considerations:

• No single agent proven superior 1
• Avoid boluses of midazolam or opioids due to hypotension risk 1
• Barbiturates can cause arterial hypotension 1
• Control systemic hemodynamics when choosing sedatives 1

What NOT to do:

• Do not use prolonged hypocapnia for ICP control - worsens ischemia and outcomes 1
• Do not use 4% albumin - increases mortality 1

Neurosurgical Interventions

Immediate Surgical Indications

Operate urgently for: 1

• Symptomatic extradural hematoma (any location)
• Acute subdural hematoma with thickness >5 mm AND midline shift >5 mm
• Acute hydrocephalus requiring drainage
• Open displaced skull fracture
• Closed displaced skull fracture with brain compression (thickness >5 mm, midline shift >5 mm)

Refractory Intracranial Hypertension

External ventricular drainage:

• Consider EVD for persistent intracranial hypertension despite sedation and correction of secondary insults 1
• Can dramatically reduce ICP with small CSF volumes 1
• Consider removing brain contusions with mass effect if first-line treatments fail 1

Decompressive craniectomy:

• Reserve for refractory intracranial hypertension after multidisciplinary discussion 1
• Unilateral temporal craniectomy (>100 cm²) with dural plasty is standard technique 1
• Evidence shows:
  • Reduces mortality (27% vs 49% with medical management alone)
  • Increases survival but with higher rates of poor functional outcome
  • Favorable outcomes at 6 months: 40-57% vs 28-32% controls 1
• Avoid bifrontal craniectomy - associated with worse outcomes in DECRA trial 1
• Age considerations: most trials excluded patients >60-70 years; decisions must be individualized 1

Critical Care Management

Monitoring Parameters

• Continuous ICP monitoring when indicated
• Cerebral perfusion pressure (CPP = MAP - ICP)
• End-tidal CO2
• Arterial blood gases
• Serum osmolality (if using osmotherapy)
• Sodium and chloride levels

Prophylaxis

• Venous thromboembolism prophylaxis (timing based on bleeding risk)
• Stress ulcer prophylaxis
• Seizure prophylaxis per institutional protocols 2

Nutritional Support

• Early nutritional optimization important for metabolic support 2

Special Populations

Pediatric Considerations

• Manage pediatric severe TBI in pediatric trauma centers or adult centers with pediatric expertise 1
• Age-adjusted ICP thresholds may be needed for younger children 1
• CPP targets vary by age:
  • 0-5 years: CPP >30 mmHg
  • 6-11 years: CPP >35 mmHg
  • 12-17 years: CPP >50 mmHg 1

Common Pitfalls to Avoid

1. Hypotension during intubation - use vasopressors proactively
2. Aggressive hyperventilation - causes cerebral ischemia
3. Sedation boluses - cause hypotension; use continuous infusions
4. Delayed surgery for mass lesions - time to operation affects outcome
5. Using albumin for resuscitation in TBI
6. Prophylactic osmotherapy without evidence of elevated ICP - not beneficial 1
7. Nihilism - avoid premature withdrawal of care; outcomes can be better than expected with proper management 3

Emerging Considerations

The 2022 Lancet Neurology Commission emphasizes that evidence for many TBI interventions remains weak 3. Ongoing research focuses on:

• Advanced neuroimaging and blood biomarkers for patient stratification
• Comparative-effectiveness research to identify best practices
• Platform trials with adaptive designs
• Multidimensional outcome assessment beyond mortality 3

Management should occur in neuroscience centers regardless of need for neurosurgical intervention for moderate-to-severe TBI 4.