9.2 Tiered Medical and Surgical ICP Management Protocols (Hyperosmolar Therapy, Sedation, CSF Drainage)
Key Takeaways
Begin with oxygenation, perfusion, near-normal ventilation, fever control and individualized positioning, analgesia and sedation. Follow both ICP and CPP after changes.
Drain CSF through an EVD as ordered. Re-level after movement, using the tragus as a landmark in the neutral supine child.
For severe pediatric TBI, BTF recommends a 3% saline bolus of 2–5 mL/kg over 10–20 minutes for raised ICP. Its continuous 3% infusion and refractory 23.4% bolus are separate Level III recommendations.
Avoid prophylactic severe hyperventilation early after injury. Brief controlled hyperventilation can serve as a bridge during active herniation while definitive care proceeds.
Escalate with neurosurgery for deterioration, herniation or refractory ICP. Barbiturate rescue requires hemodynamic stability, continuous arterial pressure monitoring and cardiovascular support.
Tiered Management of Intracranial Hypertension in Severe Pediatric TBI
Clinical core. Support cerebral perfusion while reducing the pressure from intracranial blood, CSF or swollen tissue. The pediatric BTF guideline gives recommendations for individual interventions. Its companion 2019 consensus algorithm groups options into baseline care and first- and second-tier therapy. The exam priority is recognizing which intervention fits the cause and urgency, especially when a lesion needs surgery before a full medical sequence.
Baseline Neuroprotection and Early Reassessment
- Position and venous drainage. Start near 30° head elevation with neutral alignment if compatible with spinal precautions and hemodynamics. Avoid neck compression and keep appropriate cervical stabilization. Observe both ICP and CPP after repositioning. A pediatric physiologic study found that the position producing the lowest ICP and highest CPP varied among children and across days. Pediatric head elevation study
- Systemic physiology. Maintain oxygenation, near-normal ventilation, temperature control, glucose availability and euvolemia. Use isotonic fluid for maintenance as appropriate, provide glucose when indicated, and monitor glucose and sodium. Treat fever and address painful stimulation or ventilator dyssynchrony.
- Analgesia and sedation. Individualize maintenance sedation and reassess BP after changes. BTF suggests avoiding bolus fentanyl and/or midazolam during ICP crises because abrupt hypotension can impair cerebral perfusion. Prolonged continuous propofol is discouraged in pediatric severe TBI, and the U.S. label does not indicate it for pediatric ICU sedation. Unexplained metabolic acidosis, rhabdomyolysis, hyperkalemia or cardiovascular instability during exposure can signal propofol infusion syndrome and requires prompt discontinuation and organ support. BTF pediatric guideline · FDA propofol label
Confirm a sustained high ICP signal and look for correctable causes, including pain, positioning, hypoventilation, seizure and a new mass lesion. The BTF Level III goal is ICP below 20 mmHg. Interpret the trace alongside CPP and the neurologic exam. A new fixed pupil or abrupt deterioration demands immediate intervention and neurosurgical assessment even while monitoring or imaging is being arranged. BTF pediatric guideline · Companion consensus algorithm
Initial ICP-Lowering Interventions
CSF drainage. BTF suggests drainage through an external ventricular drain (EVD). The ventricular catheter can drain CSF and measure ICP, depending on the stopcock position and equipment. With a typical single transducer, close the path to drainage and open the patient-to-transducer path to obtain a reliable pressure reading. A separate intraparenchymal sensor can measure pressure during ventricular drainage. Level the reference to approximate the foramen of Monro, usually using the tragus or external auditory meatus in a supine child. Re-level after position changes and set the drainage height and mode as ordered by neurosurgery. A chamber below its ordered level increases the pressure gradient and risks overdrainage and ventricular collapse. A chamber too high can impede drainage. Pediatric EVD protocol · Pediatric ICP monitoring study
Hyperosmolar therapy. An osmotic gradient can draw water out of brain tissue and reduce ICP. BTF gives the following dosing recommendations for severe pediatric TBI.
| Therapy | Dose and role | Monitoring and decision points |
|---|---|---|
| 3% saline, acute bolus | 2–5 mL/kg IV over 10–20 min for intracranial hypertension (Level II) | Check ICP, CPP, sodium, chloride and renal function. Reassess after the bolus before further dosing. For a 20-kg child, the acute range is 40–100 mL. |
| 3% saline, infusion | 0.1–1 mL/kg/h, using the lowest protocol dose needed to control ICP (Level III) | Titrate to ICP response. Check sodium and fluid balance serially. BTF gives safety cautions rather than a fixed sodium treatment target. |
| 23.4% saline, rescue bolus | 0.5 mL/kg IV, maximum 30 mL, for refractory ICP (Level III) | Use monitored specialist administration and the high-concentration access protocol. |
| Mannitol | An alternative in some rescue protocols. ENLS describes 0.5–1 g/kg IV over 5–15 min. The BTF pediatric evidence review found no eligible mannitol studies for its recommendation. | Check hemodynamics, volume status, kidney function and osmolar gap when considering repeat dosing. Osmotic diuresis can worsen hypovolemia and hypotension. |
With multiple ICP therapies, BTF advises avoiding sustained sodium above 160 mEq/L because of an association with deep venous thrombosis, and avoiding levels above 170 mEq/L sustained longer than 72 hours because of associations with anemia and thrombocytopenia. Treat these as safety cautions. Address concurrent hyponatremia with its own correction limits. Later pediatric observational comparisons found a larger adjusted ICP reduction with hypertonic saline in the ADAPT subgroup starting above 25 mmHg, with no significant overall adjusted difference. A 2025 cohort did not demonstrate better survival or function with hypertonic saline. When the hypotensive child with hemorrhage has raised ICP, hypertonic saline is a reasonable choice for ICP control while hemorrhage resuscitation proceeds. BTF · ENLS v6 · ADAPT · 2025 pediatric cohort · NCS osmotherapy monitoring guidance
Ventilation. The companion pediatric algorithm starts with arterial PaCO₂ near 35–40 mmHg. Prophylactic PaCO₂ below 30 mmHg during the first 48 hours is discouraged because reducing CO₂ constricts cerebral vessels and can worsen ischemia. In suspected active herniation, brief controlled hyperventilation toward PaCO₂ 30–35 mmHg can buy time while definitive treatment is mobilized. The 30–35 mmHg range is an example from a pediatric emergency pathway. If hyperventilation is used for refractory ICP, BTF suggests advanced monitoring for cerebral ischemia. BTF · Pediatric algorithm · Riley Children’s emergency pathway
Refractory ICP and Surgical Rescue
- Treat the cause. BTF suggests decompressive craniectomy for neurologic deterioration, herniation or ICP refractory to medical management. A surgically accessible hematoma with worsening mass effect may need immediate evacuation. The timing and operative technique depend on the exam, imaging, overall trajectory and neurosurgical assessment.
- Neuromuscular blockade. A monitored trial may help when coughing, shivering or ventilator dyssynchrony is contributing. Maintain analgesia and sedation, and account for the loss of the motor examination and visible seizure signs.
- Temperature. Routine prophylactic cooling to 32–33°C does not improve overall outcomes. The Cool Kids randomized trial tested early cooling, not a rescue indication. BTF suggests 32–33°C as an ICP-control option. If used, rewarm by 0.5–1°C every 12–24 hours or more slowly. Monitor hemodynamics and electrolytes, and reassess phenytoin levels and dosing if used. Cool Kids trial · BTF
- Barbiturates. BTF suggests high-dose barbiturates in hemodynamically stable children with refractory ICP despite maximal medical and surgical management. Continuous arterial BP monitoring and cardiovascular support to maintain CPP are required. Pentobarbital dosing is protocol-specific. Follow ICP and continuous EEG, using EEG to guide suppression and detect excessive dosing, with no universal bursts-per-minute target. Anticipate myocardial depression and vasodilation and titrate cardiovascular support. BTF · Pediatric consensus algorithm
Corticosteroids are not suggested for ICP control or outcome improvement after severe TBI. A separate indication such as adrenal replacement still applies. BTF
A 7-year-old with severe TBI and suspected intra-abdominal bleeding has ICP 26 mmHg and MAP 57 mmHg. While hemorrhage control and blood resuscitation proceed, which hyperosmolar strategy is most appropriate for the intracranial hypertension?
Choose mannitol specifically for its diuretic effect because reducing circulating volume will raise CPP.
Choose mannitol because entry into injured brain tissue is the intended osmotic effect.
Defer all ICP-directed therapy until hemorrhage resuscitation is complete.
Give 3% saline 3 mL/kg IV over 10–20 minutes and reassess ICP and perfusion while resuscitation continues.
An 8-year-old with an external ventricular drain is repositioned supine with the head neutral. Which reference should the nurse use for re-leveling, and what can happen if the chamber is set below its prescribed level?
Use the tragus as the surface reference for the foramen of Monro. A chamber set too low can cause CSF overdrainage and ventricular collapse.
Use the phlebostatic axis. A chamber set too low impedes CSF drainage.
Use the bridge of the nose. A chamber set too low reverses the pressure gradient and drives fluid toward the ventricle.
Use the clavicle. Chamber height has no effect if the catheter remains in the ventricle.
A 12-year-old with severe TBI remains hemodynamically stable but has refractory intracranial hypertension despite maximal medical and surgical management. The team elects to start pentobarbital. Which monitoring and titration plan is appropriate?
Increase the dose to produce an isoelectric EEG, and restrict fluids if BP falls.
Use continuous EEG and the ICP response to guide suppression. Monitor arterial BP continuously and provide cardiovascular support to maintain CPP.
Increase the dose until pupillary light reflexes disappear, and give loop diuretics for any hypotension.
Stop arterial monitoring once the dose is stable because barbiturates reliably raise CPP.
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