Management of Severe Traumatic Brain Injury with 3% Hypertonic Saline

Dosing and Administration

The recommended dose of 3% hypertonic saline for severe traumatic brain injury is 250 mOsm (approximately 1.4 mL/kg) infused over 15-20 minutes to treat threatened intracranial hypertension or signs of brain herniation, as per the guidelines from the American Society of Anesthesiologists 1, 2
The target osmolar load is 250 mOsm per treatment, which is equiosmolar to mannitol 20%, according to the American College of Surgeons 1, 2
The infusion rate should be administered over 15-20 minutes for optimal ICP reduction, as recommended by the Brain Trauma Foundation 1, 2

3% hypertonic saline should be administered when there are obvious neurological signs of increased ICP, such as pupillary abnormalities or neurological worsening not attributable to systemic causes, as indicated by the American Academy of Neurology 1, 2
It should be used as first-line osmotherapy for signs of brain herniation, according to the Neurocritical Care Society 1, 2
Prophylactic administration is not recommended in patients with no evidence of intracranial hypertension, as stated by the American College of Emergency Physicians 2

The cerebral perfusion pressure (CPP) should be maintained between 60-70 mmHg throughout treatment, as recommended by the American Heart Association 1, 2
CPP < 60 mmHg is associated with poor neurological outcomes, according to the Brain Injury Foundation 1
Mean arterial pressure (MAP) should be measured at the external ear tragus as the reference point, as suggested by the American Society of Anesthesiologists 1

3% hypertonic saline is superior to mannitol in hypotensive or hypovolemic patients, as stated by the European Society of Intensive Care Medicine 3
Hypertonic saline does not cause osmotic diuresis requiring volume compensation, unlike mannitol, according to the American College of Surgeons 1, 2

Serum sodium and osmolarity should be monitored closely, and serum osmolality should remain below 320 mOsm/L, as recommended by the National Institute of Neurological Disorders and Stroke 3
Fluid, sodium, and chloride balances should be monitored throughout treatment, according to the American Society of Anesthesiologists 2
Prolonged or severe hyperventilation should be avoided, as it exacerbates secondary ischemic lesions and decreases cerebral blood flow, as warned by the American Thoracic Society 2