Monitoring and Management of Raised Intracranial Pressure

Indications and Device Selection

The European Society of Intensive Care Medicine recommends ICP monitoring in patients at risk of elevated ICP based on clinical and/or imaging features, with a strong recommendation for protocol-driven monitoring 1, 2
Comatose patients with abnormal CT scan findings, such as compressed basal cisterns, midline shift >5mm, or intracerebral hematoma >25mL, should undergo ICP monitoring 4, 5
Post-neurosurgical patients after intracranial hematoma evacuation with certain risk factors, including GCS motor score ≤5, anisocoria/bilateral mydriasis, preoperative hemodynamic instability, or severe imaging findings, require ICP monitoring 4, 5
Patients requiring sedation or paralysis, where neurological examination is not feasible, should be monitored for ICP 1, 2
The American Association of Neurological Surgeons suggests that conditions beyond TBI, including subarachnoid hemorrhage, intracerebral hemorrhage, encephalitis, and acute hepatic failure, may require ICP monitoring 1, 2

ICP and cerebral perfusion pressure (CPP) should be monitored continuously with waveform quality assessment using structured protocols, as recommended by the Neurocritical Care Society 2
CPP should be calculated as mean arterial pressure (MAP) minus ICP, with a target CPP >50-60 mmHg, according to the European Society of Intensive Care Medicine 1, 2
Instantaneous ICP values should be interpreted in context of trends, CPP, and clinical evaluation, never in isolation, as suggested by the American Association of Neurological Surgeons 2
ICP >20-25 mmHg defines intracranial hypertension, requiring treatment, according to the European Society of Intensive Care Medicine 1, 2, 6
ICP 20-40 mmHg carries a 3.95-fold increased risk of mortality and poor neurological outcome, as reported by the Anaesthesia journal 4, 5, 6
ICP >40 mmHg increases mortality risk 6.9-fold and demands immediate aggressive intervention, according to the Anaesthesia journal 4, 5, 6

Monitoring indications and methods should be tailored to specific diagnoses, such as TBI, SAH, ICH, and encephalitis, which have different monitoring needs and thresholds, as recommended by the European Society of Intensive Care Medicine 1, 2, 3
Refractory ICP elevation strongly predicts mortality but should not be used alone for prognostication of functional outcomes, as suggested by the European Society of Intensive Care Medicine 2, 3
Clinical evaluation and imaging remain fundamental, and monitoring augments but does not replace clinical assessment, according to the European Society of Intensive Care Medicine 1, 2