Management of High Intracranial Pressure in Traumatic Brain Injury

ICP Monitoring and Management

The management of high ICP in TBI requires a stepwise approach, with interventions escalated based on patient response, reserving more aggressive treatments for refractory cases 1
ICP monitoring is indicated in severe TBI patients with abnormal CT findings, as more than 50% of these patients will develop intracranial hypertension 2, 3
An ICP of 20-40 mmHg is associated with a 3.95 times higher risk of mortality and poor neurological outcome; above 40 mmHg, mortality risk increases 6.9-fold 2

Head of bed elevation to 20-30° to assist venous drainage and minimize edema formation 4
Sedation and analgesia following protocols similar to non-brain injured patients, with modifications for ICP control 5, 6
Maintain adequate cerebral perfusion pressure (CPP) ≥ 60 mmHg when ICP monitoring is available 7
Controlled ventilation to maintain PaCO2 between 35-40 mmHg during routine management 7

Temporary hyperventilation (PaCO2 30-35 mmHg) for acute ICP crises or signs of herniation 4, 7

Decompressive craniectomy may reduce mortality (26.9% vs 48.9% in medical management) but potentially at the expense of increased severe disability 2, 8, 9
The RESCUE-ICP study showed decompressive craniectomy reduced mortality compared to barbiturate coma but did not improve favorable outcomes at 6 months 8

Oxygenation: Maintain PaO2 between 60-100 mmHg 1, 7
Ventilation: Maintain PaCO2 between 35-40 mmHg (except during temporary hyperventilation for herniation) 1, 7
Coagulation: Maintain platelet count >50,000/mm³ for life-threatening hemorrhage and higher for neurosurgical interventions 7
Hemostasis: Keep PT/aPTT <1.5 times normal control during interventions 7

In cases of cerebral herniation, osmotherapy and/or temporary hypocapnia are recommended while awaiting definitive management 7
Point-of-care coagulation tests (TEG, ROTEM) should be utilized when available to guide coagulation management 7
For patients requiring both neurosurgical intervention and treatment for life-threatening hemorrhage elsewhere, protocols for simultaneous multisystem surgery should be established 7

Daily interruption of sedation may be harmful in TBI patients with signs of high ICP 5
Avoid hypotension, as decreased cerebral perfusion pressure below 60 mmHg can worsen brain edema and secondary injury 2, 3
Corticosteroids have not shown benefit in TBI and are not recommended for ICP control 4
Bifrontal craniectomy was associated with worse outcomes in the DECRA study and should be used cautiously 8, 9
Avoid hypo-osmolar fluids that may worsen cerebral edema 4