Cerebral Perfusion Pressure Calculator
Calculate Cerebral Perfusion Pressure (CPP = MAP − ICP) — the driving pressure for cerebral blood flow.
What is Cerebral Perfusion Pressure?
Cerebral Perfusion Pressure is the difference between the pressure pushing blood into the brain (MAP) and the pressure resisting it (intracranial pressure, ICP). In neurocritical care, maintaining CPP between 60–80 mmHg is essential to prevent secondary brain injury after trauma or stroke.
How is it calculated?
CPP (mmHg) = MAP − ICP. Targets: ≥ 60 in adults; ≥ 50 in pediatric traumatic brain injury (age dependent).
Frequently Asked Questions
- How is ICP measured?
- Intraventricular catheter or intraparenchymal probe.
- Why does low CPP harm the brain?
- It causes ischaemia and secondary cell death.
- Can MAP be too high?
- Yes — > 110 may worsen cerebral oedema.