Initial Management of Traumatic Brain Injury in the ICU

Initial Assessment and Classification

The initial management of traumatic brain injury (TBI) requires evaluating TBI severity using the Glasgow Coma Scale (GCS), with severe TBI defined as GCS ≤8, moderate TBI as GCS 9-13, and mild TBI as GCS 14-15 1
Suspect intracranial hypertension when major criteria or two minor criteria are present, as recommended by the British Journal of Anaesthesia 2

Perform urgent neurological evaluation and brain CT scan to determine severity of brain damage, as recommended by Praxis Medical Insights 3

Implement ICP monitoring in severe TBI patients with abnormal CT findings, as more than 50% will develop intracranial hypertension 1, 4
Recognize that 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 4
Maintain adequate cerebral perfusion pressure (CPP) ≥60 mmHg when ICP monitoring is available, as recommended by Praxis Medical Insights 1, 4

Elevate head of bed to 20-30° to assist venous drainage and minimize edema formation, as recommended by Praxis Medical Insights 4
Provide adequate sedation and analgesia following protocols similar to non-brain injured patients, with modifications for ICP control 4
Control ventilation to maintain PaCO2 between 35-40 mmHg during routine management, as recommended by Praxis Medical Insights 1, 4

Implement osmotherapy with hypertonic saline or mannitol for refractory intracranial hypertension, as recommended by Praxis Medical Insights 1

Consider decompressive craniectomy for refractory intracranial hypertension, recognizing it may reduce mortality but potentially at the expense of increased severe disability, as recommended by Praxis Medical Insights 1, 4

Maintain PaO2 between 60-100 mmHg, as recommended by Praxis Medical Insights 1, 4
Maintain PaCO2 between 35-40 mmHg, except during temporary hyperventilation for herniation, as recommended by Praxis Medical Insights 1, 4

Balance addressing life-threatening hemorrhage with preventing secondary brain injury, as recommended by Praxis Medical Insights 1, 3

Daily interruption of sedation may be harmful in TBI patients with signs of high ICP, as recommended by Praxis Medical Insights 4
Corticosteroids have not shown benefit in TBI and are not recommended for ICP control, as recommended by Praxis Medical Insights 4

Noncontrast CT (NCCT) should be the initial triaging diagnostic imaging test of choice for all patients with acute moderate to severe TBI, as recommended by the American College of Radiology 5, 6
NCCT is highly sensitive for detecting clinically important TBI, defined as severe intracranial injury potentially resulting in death, neurologic intervention, intubation for >24 hours, or admission for >2 days 5
NCCT effectively detects intracranial hemorrhage, extra-axial fluid collections, skull fractures, radiopaque foreign bodies, cerebral edema, swelling and signs of herniation 5
Follow-up NCCT is indicated for any trauma patient with neurologic deterioration (Class I recommendation) 7
Repeat NCCT is supported for patients with moderate to severe TBI and anticoagulated patients with abnormalities on initial NCCT 7
MRI may be indicated in particular instances when there are persistent neurologic, cognitive, and behavioral symptoms, such as new-onset, progressive, or worsening symptoms (Class I recommendation) 7

The severity of TBI should be classified using the Glasgow Coma Scale (GCS) score: moderate TBI as GCS scores of 9 to 12, and severe TBI as GCS scores of 3 to 8, as recommended by the American College of Radiology 5
Serial GCS scores are more valuable in predicting survival than a single GCS score 5

The routine practice of repeat NCCT is not supported for patients with mild TBI with negative results on initial NCCT (Class III recommendation), as stated by the American College of Radiology 7