Doctaverse
Emergency/Resus

Cerebral Perfusion Pressure (CPP)

Net pressure driving cerebral blood flow — mean arterial pressure minus intracranial pressure.

Written for clinicians. If you're a parent or patient, don't act on these numbers — talk to your child's doctor.

Scope: Requires invasive arterial and ICP monitoring zeroed at the same reference (tragus/foramen of Monro). Targets per the pediatric severe TBI guidelines.

Inputs

FieldUnitNotes
Mean arterial pressure mmHg 20–200
Intracranial pressure mmHg 0–100
Age band (optional) — Minimum acceptable CPP rises with age

FAQ

What is the Cerebral Perfusion Pressure (CPP)?

Net pressure driving cerebral blood flow — mean arterial pressure minus intracranial pressure.

What inputs does the Cerebral Perfusion Pressure (CPP) need?

Mean arterial pressure (mmHg), Intracranial pressure (mmHg), Age band (optional).

Are there any limitations?

Requires invasive arterial and ICP monitoring zeroed at the same reference (tragus/foramen of Monro). Targets per the pediatric severe TBI guidelines.

Related guides

Cerebral Perfusion Pressure (CPP): MAP − ICP and the Age-Banded Targets

CPP is the net pressure driving cerebral blood flow — CPP = MAP − ICP. The formula, the absolute ≥40 mmHg floor, age-banded targets (infant ≥40, child ≥50, adolescent ≥55), and monitoring pitfalls.

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