Management of Subdural Hemorrhage

Immediate Stabilization and Resuscitation

The American College of Surgeons recommends immediate tracheal intubation with mechanical ventilation and continuous end-tidal CO₂ monitoring to reduce mortality and prevent secondary brain injury 1, 4
Maintain PaCO₂ within normal range (35-40 mmHg) as hypocapnia causes cerebral vasoconstriction and brain ischemia 1, 3, 4
End-tidal CO₂ monitoring confirms correct tube placement and guides ventilation targets 1
Maintain systolic blood pressure >110 mmHg using vasopressors (phenylephrine or norepinephrine) without delay 1, 4
Even a single episode of hypotension (SBP <90 mmHg) significantly worsens neurological outcomes 1, 4
Use continuous infusions of sedatives rather than boluses to prevent hemodynamic instability 1, 4

Transfer acute subdural hematoma with mass effect as a time-critical transfer to neurosurgical center 5, 6
Transfer should occur even before complete stabilization in time-critical cases 5, 6
Acute subdural hematoma with mass effect requires time-critical transfer by local team rather than waiting for specialized pediatric transport 5, 6
Transfer team should include an anesthetist with pediatric training when possible 5, 6

Acute subdural hematoma with thickness >5 mm AND midline shift >5 mm requires immediate surgical evacuation 1, 2, 3
Any symptomatic subdural hematoma with significant mass effect, neurological deterioration, or decreased level of consciousness requires immediate surgery 1, 2
Standard craniotomy with hematoma evacuation remains the first-line surgical approach 1
Burr hole drainage is the preferred first-line surgical approach for chronic subdural hematomas 2
Place subdural drain to reduce recurrence rates 2
Consider decompressive craniectomy for refractory intracranial hypertension in multidisciplinary discussion, particularly in patients <65-70 years 1, 3

Monitor ICP after subdural hematoma evacuation if ANY of the following are present: preoperative GCS motor response ≤5, preoperative anisocoria or bilateral mydriasis, preoperative hemodynamic instability, preoperative severity signs on imaging, intraoperative cerebral edema, or postoperative appearance of new intracranial lesions 1, 4
Maintain cerebral perfusion pressure (CPP) between 60-70 mmHg, as CPP <60 mmHg is associated with poor outcomes 1, 4
Perform external ventricular drainage to treat persisting intracranial hypertension despite sedation and correction of secondary brain insults 3
Drainage of small volumes of CSF can markedly reduce intracranial pressure 3
Antiepileptic drugs are NOT recommended for primary prevention of post-traumatic seizures as they show no benefit and may worsen neurological outcomes 2
Consider antiepileptic drugs only if specific risk factors are present, such as chronic subdural hematoma or prior epilepsy 2
Use standardized ICU care bundles if mechanical ventilation required 7

Perform MRI of brain with contrast and whole spine to investigate for spinal CSF leak when subdural hematoma occurs without clear trauma history 2
Small or asymptomatic hematomas should be managed conservatively while treating the CSF leak 2
Symptomatic hematomas with significant mass effect may need burr hole drainage in conjunction with treating the leak 2
Require careful monitoring as small hematomas can expand rapidly, especially in those on anticoagulants 1

Never delay surgical intervention when neurological deterioration occurs as this leads to poorer outcomes 1, 2
Never hyperventilate aggressively as this causes profound cerebral vasoconstriction and ischemia 1, 4
Never allow even single episodes of hypotension (SBP <90 mmHg) which markedly worsens prognosis 1, 4
Never use sedation boluses instead of continuous infusions as this causes hemodynamic instability 1, 4
Never induce hypervolemia as it does not improve outcomes and may cause complications 2, 7