Traumatic Brain Injury Management: A Practical Guide for the Acute Setting
Clinical Practice Update — Severity Assessment, ICP Control, Surgical Decision-Making, and Neuroprotective Care in Adults
This is an original clinical education article informed by current guidelines and evidence. See References below for source documents.
- Clinical Focus
- Initial assessment, severity classification, intracranial pressure management, surgical indications, and neuroprotective strategies in adult traumatic brain injury
- Target Audience
- Trauma surgeons, neurosurgeons, emergency physicians, intensivists, surgical residents
- Setting
- Emergency departments, trauma centres, neurosurgical intensive care units
- Source Evidence
- •Brain Trauma Foundation (BTF) Guidelines for Management of Severe TBI, 4th Edition (2016)
- •NICE Head Injury Guidelines (NG232, updated 2023)
- •CRASH-3 Trial — Tranexamic Acid in Acute TBI (Lancet, 2019)
- •ACS TQIP Best Practices in Management of TBI (2015)
- •CENTER-TBI Collaborative European Study — ICP Monitoring Outcomes (Lancet Neurology, 2022)
Key Clinical Takeaways
The most important actionable points from this Practice Update on traumatic brain injury management. Each links to the full discussion below.
- 1Classify every head injury patient by GCS into mild, moderate, or severe within the first minutes of arrival — this drives every subsequent decision → Classifying Severity
- 2Obtain a CT head without contrast within one hour of presentation for any patient with GCS 12 or below, or with red-flag features on a validated decision rule → When to Image
- 3Keep intracranial pressure below 22 mmHg using a tiered escalation approach — positioning and sedation first, osmotherapy second, and decompression as a last resort → Controlling ICP
- 4Target cerebral perfusion pressure between 60 and 70 mmHg — avoid aggressive attempts to push CPP above 70 → Controlling ICP
- 5Give tranexamic acid within three hours of injury in patients with traumatic intracranial bleeding who are not expected to die — benefit diminishes after this window → Early Neuroprotective Measures
- 6Evacuate acute subdural haematomas thicker than 10 mm or causing midline shift greater than 5 mm without delay → When to Operate
- 7Prevent secondary brain injury relentlessly — avoid hypotension (SBP below 110 mmHg for patients aged 15–49 or over 70, and below 100 mmHg for patients aged 50–69) and hypoxia (SpO2 below 90%) at all times → Early Neuroprotective Measures
- 8Use seizure prophylaxis for seven days following severe TBI — levetiracetam or phenytoin, but do not continue beyond one week without documented seizure activity → Monitoring and Follow-Up
How Should You Classify Traumatic Brain Injury Severity?
The Glasgow Coma Scale remains the foundation for initial traumatic brain injury management triage. A single GCS score recorded after resuscitation and before sedation is the most reliable predictor of the immediate management pathway. However, GCS alone misses important nuances — pupil reactivity, mechanism, and imaging findings must be considered alongside the score.
Perform and document a Glasgow Coma Scale assessment on every head-injured patient immediately after primary survey stabilisation and before any sedating medications are administered. Record the best motor response if asymmetric.
Strong Rec High Evidence BTF 2016 NICE 2023Assess and record pupil size and reactivity bilaterally alongside GCS. A unilateral fixed dilated pupil in a deteriorating patient should trigger an immediate CT and neurosurgical consultation, regardless of the GCS score.
Strong Rec Moderate Evidence BTF 2016 ACS TQIP 2015Do not rely on a single GCS assessment for disposition decisions. Repeat the GCS at least every 30 minutes in the first 2 hours, then hourly for 4 hours. Any decline of 2 or more points requires urgent reassessment and repeat imaging.
Strong Rec Low Evidence NICE 2023TBI Severity: What Each Category Means for Your Next Steps
| Severity Category | GCS Range | Immediate Management Priority | Imaging Urgency | Common Pitfalls |
|---|---|---|---|---|
| Mild | 13–15 | Clinical observation; apply a validated CT decision rule (Canadian CT Head Rule or NICE criteria) | Within 1 hour if red flags present; may observe if no risk factors | Discharging GCS 15 patients on anticoagulants without CT — delayed haematomas are common in this group |
| Moderate | 9–12 | Admit to monitored bed; serial neurological assessments; neurosurgical awareness | CT within 1 hour, repeat at 6–8 hours or sooner if declining | Under-triaging moderate TBI to general wards without neurological monitoring capability |
| Severe | 3–8 | Intubate for airway protection; target SBP ≥110 (or ≥100 for ages 50–69) and SpO2 ≥94%; activate neurosurgical team | Immediate CT — should not delay resuscitation but should be obtained as soon as patient is stable enough for transfer | Hypotension from polytrauma sources being missed while focus is on the head — always complete the primary survey |
When Should You Order a CT Head?
Not every head injury needs imaging, but every missed intracranial bleed is a potential disaster. Validated clinical decision rules help identify which patients with mild TBI need a scan and which can be safely observed.
Perform CT head within 1 hour for all patients with GCS below 13 at any point since the injury, any focal neurological deficit, suspected open or depressed skull fracture, post-traumatic seizure, or more than one episode of vomiting.
Strong Rec High Evidence NICE 2023Consider CT head within 8 hours (or immediately if presenting after 8 hours) for patients on anticoagulants, antiplatelet agents other than aspirin monotherapy, or with a bleeding disorder who have sustained any head injury with loss of consciousness or amnesia, regardless of current GCS.
Moderate Rec Moderate Evidence NICE 2023Consider repeat CT at 6–8 hours if the initial scan shows traumatic pathology, or sooner if the patient deteriorates clinically. Routine repeat scanning of stable patients with unchanged examination adds cost without clear benefit.
Moderate Rec Low Evidence ACS TQIP 2015What Should You Do in the First Hour to Prevent Secondary Injury?
The primary injury is already done by the time the patient arrives. Everything you do from this point is about preventing the secondary insults — hypotension, hypoxia, hyperglycaemia, and coagulopathy — that cause the greatest additional damage to the injured brain.
Maintain systolic blood pressure at or above 110 mmHg for patients aged 15–49 and over 70, and at or above 100 mmHg for patients aged 50–69. Even a single episode of hypotension (SBP below 90 mmHg) in the first hours doubles mortality in severe TBI. Use isotonic crystalloid for volume resuscitation and vasopressors if needed.
Conditional Rec Low Evidence BTF 2016Maintain oxygen saturation at or above 94% and PaO2 at or above 60 mmHg. Intubate any patient with GCS 8 or below for definitive airway control. Avoid routine hyperventilation — PCO2 targets should be 35–40 mmHg unless actively managing an acute herniation event.
Strong Rec High Evidence BTF 2016 ACS TQIP 2015Administer tranexamic acid 1 g IV over 10 minutes followed by 1 g infusion over 8 hours in patients with traumatic intracranial haemorrhage presenting within 3 hours of injury (CRASH-3 protocol). Alternatively, NICE 2023 recommends a single 2 g IV bolus given as soon as possible within 2 hours of injury for patients with GCS 12 or below without active extracranial bleeding. The benefit is greatest when given early and in patients with mild-to-moderate TBI who are not expected to die from their injuries.
Moderate Rec Moderate Evidence CRASH-3 2019 NICE 2023Reverse anticoagulation urgently in patients on warfarin (with prothrombin complex concentrate and vitamin K) or direct oral anticoagulants (with specific reversal agents where available) who have intracranial bleeding on CT.
Strong Rec Moderate Evidence NICE 2023 ACS TQIP 2015How Should You Manage Raised Intracranial Pressure?
Sustained intracranial hypertension is the leading modifiable cause of death after severe traumatic brain injury. The approach should be tiered, escalating from simple measures to aggressive interventions, with the aim of maintaining adequate cerebral perfusion throughout.
Monitor intracranial pressure in all salvageable patients with severe TBI (GCS 3–8 after resuscitation) who have an abnormal CT scan. Use an intraparenchymal probe or external ventricular drain depending on clinical need and operator expertise.
Strong Rec Moderate Evidence BTF 2016Initiate ICP-lowering treatment when intracranial pressure exceeds 22 mmHg. This threshold is associated with increased mortality and should be treated promptly, not observed.
Strong Rec Moderate Evidence BTF 2016Target cerebral perfusion pressure between 60 and 70 mmHg. Do not attempt to drive CPP above 70 mmHg with vasopressors — aggressive CPP augmentation increases the risk of ARDS without improving neurological outcomes.
Strong Rec Moderate Evidence BTF 2016Do not use prophylactic hyperventilation (PCO2 below 25 mmHg). Brief targeted hyperventilation to PCO2 of 30–35 mmHg is acceptable only as a temporising measure during acute transtentorial herniation while preparing for definitive intervention.
Against Moderate Evidence BTF 2016ICP Management: A Tiered Escalation Approach
| Tier | Intervention | Mechanism | Key Precautions | When It Fails |
|---|---|---|---|---|
| Tier 0 | Head elevation 30°, midline positioning, loosen C-collar, treat fever and pain | Optimise venous drainage and reduce metabolic demand | Ensure cervical spine is cleared before aggressive head positioning | Move to Tier 1 |
| Tier 1 | Sedation (propofol or midazolam) + analgesia; CSF drainage via EVD if in situ | Reduce cerebral metabolic rate and directly remove CSF volume | Propofol infusion syndrome risk with prolonged high-dose use; monitor triglycerides | Move to Tier 2 |
| Tier 2 | Osmotic therapy: mannitol 20% (0.25–1 g/kg bolus) or hypertonic saline (23.4% 30 mL or 3% infusion) | Creates osmotic gradient to draw water from brain parenchyma | Check serum osmolality before each mannitol dose (hold if >320 mOsm/L); check sodium for HTS (hold if >160 mmol/L) | Move to Tier 3 |
| Tier 3 | Decompressive craniectomy or barbiturate coma (thiopental or pentobarbital) | Create space for swollen brain or suppress metabolic demand to minimum | Barbiturates cause severe hypotension — require vasopressor support; craniectomy may improve survival but not always functional outcome | Reassess goals of care with family |
- Always address reversible causes before escalating: blocked EVD, seizures, fever, agitation, hyponatraemia.
- There is no high-quality evidence that mannitol is superior to hypertonic saline or vice versa — choose based on institutional familiarity and contraindications.
When Should You Operate?
Surgical decision-making in TBI depends on the type of lesion, its size, the degree of mass effect, and the patient's neurological trajectory. Some indications are clear-cut; others require careful weighing of expected outcomes.
Evacuate an acute epidural haematoma greater than 30 cm³ in volume regardless of GCS. Operate within 2 hours of neurological deterioration for the best chance of a good outcome.
Strong Rec Moderate Evidence BTF 2016Evacuate an acute subdural haematoma thicker than 10 mm or causing midline shift greater than 5 mm, regardless of GCS. For thinner haematomas, operate if GCS has dropped by 2 or more points since injury or if ICP exceeds 20 mmHg.
Strong Rec Moderate Evidence BTF 2016Consider decompressive craniectomy in patients with refractory intracranial hypertension not responding to maximum medical therapy. The procedure reduces mortality but may increase the proportion of survivors with severe disability — discuss prognosis with families before proceeding.
Conditional Rec Moderate Evidence BTF 2016 RESCUEicp 2016Clinical Decision Pathway
A practical, question-based approach to managing a patient with suspected traumatic brain injury from arrival through the first 72 hours.
Monitoring and Follow-Up
Prescribe seizure prophylaxis with levetiracetam or phenytoin for 7 days following severe TBI. Do not continue anticonvulsants beyond 7 days unless the patient has had a documented seizure — long-term prophylaxis does not prevent late post-traumatic epilepsy.
Strong Rec Moderate Evidence BTF 2016Initiate enteral nutrition early and aim to attain basal caloric replacement by at least the fifth day and at most the seventh day post-injury. Transgastric jejunal feeding is preferred to reduce ventilator-associated pneumonia. Early nutritional support is associated with reduced infection rates and better functional outcomes at discharge.
Strong Rec Moderate Evidence BTF 2016Avoid routine use of high-dose corticosteroids in traumatic brain injury. The CRASH trial demonstrated increased mortality at 2 weeks with methylprednisolone infusion in TBI — steroids are harmful in this context, unlike in spinal cord injury or severe CAP.
Against High Evidence CRASH 2004 BTF 2016| Parameter | Target | Frequency | Red Flag |
|---|---|---|---|
| ICP | <22 mmHg | Continuous | Sustained >22 for >5 min despite Tier 1 |
| CPP | 60–70 mmHg | Continuous | CPP <50 mmHg — critical ischaemia risk |
| GCS / Pupils | Stable or improving | Every 1–2 hours | Drop ≥2 GCS points or new pupil asymmetry |
| Sodium | 135–155 mmol/L | Every 6–8 hours | <130 (cerebral salt wasting or SIADH) or >160 (excessive HTS) |
| Temperature | 36.0–37.5 °C | Every 4 hours | Fever >38.5 °C worsens ICP — treat aggressively |
Evidence in Context
What the evidence shows, where the major guidelines converge, and where clinical uncertainty persists.
Where BTF, NICE, and ACS TQIP Agree
All three frameworks agree that preventing secondary insults (hypotension, hypoxia) is the single most impactful intervention in TBI care. They concur on an ICP threshold near 20–22 mmHg for initiating treatment, the importance of CPP-guided management, the 7-day limit for seizure prophylaxis, and early nutrition. All recommend against corticosteroids in TBI.
Where Guidelines Differ
ICP monitoring indication: The BTF recommends ICP monitoring in all salvageable severe TBI patients with abnormal CT. The CENTER-TBI collaborative data, however, suggest that clinical and imaging-based monitoring without invasive ICP measurement may produce comparable outcomes in some settings — this remains actively debated.
CT decision rules: NICE uses its own criteria for mild head injury imaging, while North American practice tends to favour the Canadian CT Head Rule. Both perform well, but they identify slightly different patient populations for scanning.
Tranexamic acid: CRASH-3 showed a mortality benefit with early TXA in mild-to-moderate TBI, but uptake into formal guidelines has been cautious. Some centres have adopted it into protocol; others await further confirmatory data.
The CRASH-3 Trial: What It Changes
CRASH-3 randomised over 12,000 adults with traumatic intracranial bleeding to tranexamic acid or placebo. In the pre-specified subgroup of patients with mild-to-moderate TBI treated within 3 hours, TXA reduced head injury-related death. The effect was not significant in patients with severe TBI (GCS 3–8) or bilateral unreactive pupils, likely because these patients die from the primary injury rather than haematoma expansion. The practical takeaway: give TXA early, give it to patients who have a realistic chance of survival, and do not expect it to rescue the most devastating injuries.
Decompressive Craniectomy: The RESCUEicp Evidence
The RESCUEicp trial showed that decompressive craniectomy for refractory intracranial hypertension reduced mortality compared to continued medical management. However, it also increased the proportion of patients surviving in a vegetative state or with upper severe disability. This creates a genuine clinical and ethical dilemma: the operation saves lives, but at the cost of more survivors with severe functional impairment. The decision should always involve a candid discussion with families about realistic outcome expectations.
What We Still Don't Know
References
- 1.Carney N, Totten AM, O'Reilly C, et al. Guidelines for the Management of Severe Traumatic Brain Injury, Fourth Edition. Neurosurgery. 2017;80(1):6–15. doi:10.1227/NEU.0000000000001432
- 2.CRASH-3 Trial Collaborators. Effects of tranexamic acid on death, disability, vascular occlusive events and other morbidities in patients with acute traumatic brain injury (CRASH-3): a randomised, placebo-controlled trial. Lancet. 2019;394(10210):1713–1723. doi:10.1016/S0140-6736(19)32233-0
- 3.NICE Guideline [NG232]. Head injury: assessment and early management. Updated May 2023. nice.org.uk/guidance/ng232
- 4.Hutchinson PJ, Kolias AG, Timofeev IS, et al. Trial of Decompressive Craniectomy for Traumatic Intracranial Hypertension. N Engl J Med. 2016;375(12):1119–1130. doi:10.1056/NEJMoa1605215
- 5.Stocchetti N, Carbonara M, Citerio G, et al. Severe traumatic brain injury: targeted management in the intensive care unit. Lancet Neurol. 2017;16(6):452–464. doi:10.1016/S1474-4422(17)30118-7
- 6.ACS TQIP. Best Practices in the Management of Traumatic Brain Injury. American College of Surgeons; 2015. facs.org/quality-programs/trauma
- 7.CRASH Trial Collaborators. Effect of intravenous corticosteroids on death within 14 days in 10,008 adults with clinically significant head injury (MRC CRASH trial): randomised placebo-controlled trial. Lancet. 2004;364(9442):1321–1328. doi:10.1016/S0140-6736(04)17188-2
- 8.Steyerberg EW, Wiebers DO, Molyneux AJ, et al; CENTER-TBI Investigators. Comparative Effectiveness of Intracranial Pressure Monitoring Versus Imaging and Clinical Examination in the Management of Traumatic Brain Injury. Lancet Neurol. 2022. center-tbi.eu
- 9.Andrews PJD, Sinclair HL, Rodriguez A, et al; Eurotherm3235 Trial Collaborators. Hypothermia for Intracranial Hypertension after Traumatic Brain Injury. N Engl J Med. 2015;373(25):2403–2412. doi:10.1056/NEJMoa1507581
- 10.Cooper DJ, Nichol AD, Bailey M, et al; POLAR Trial Investigators. Effect of Early Sustained Prophylactic Hypothermia on Neurologic Outcomes Among Patients With Severe Traumatic Brain Injury. JAMA. 2018;320(21):2211–2220. doi:10.1001/jama.2018.17075
How to Read the Evidence Tags
Every recommendation in this article carries two tags indicating how strong the recommendation is and how robust the supporting evidence is. These are Medaptly's own simplified interpretations for educational clarity.
Recommendation Strength
| Tag | What It Means | In Practice |
|---|---|---|
| Strong Rec | High-quality evidence broadly supports this action. The benefits clearly outweigh the risks for most patients. | This should be standard practice. Most patients meeting the criteria should receive this intervention. |
| Moderate Rec | The weight of evidence favours this action, though some uncertainty remains. | Most patients should receive this, but clinical context may reasonably lead to a different decision in individual cases. |
| Conditional Rec | The benefit is less certain. The right choice depends on the individual patient's circumstances, preferences, and risk profile. | Discuss with the patient or family. This may be appropriate for some but not all. Use shared decision-making. |
| Against | Evidence shows no benefit, or the risks outweigh potential benefits. | Avoid this intervention. If considering it in an unusual circumstance, document your reasoning carefully. |
Evidence Quality
| Tag | What It Means | How Confident Can You Be? |
|---|---|---|
| High Evidence | Based on multiple well-designed randomised controlled trials or high-quality meta-analyses. | Very confident. Future research is unlikely to change this recommendation substantially. |
| Moderate Evidence | Based on a single randomised trial, large observational studies, or meta-analyses with some limitations. | Reasonably confident. The direction is likely correct, but the magnitude of benefit may be refined by future studies. |
| Low Evidence | Based on expert consensus, small studies, case series, or extrapolated from related evidence. | Less certain. This is the best available guidance, but it may change as better evidence becomes available. |
These are Medaptly's simplified interpretations for educational clarity. For the full classification systems used by each source guideline, consult the original documents listed in References.