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CPP = MAP - ICP — FRCA Primary MCQ

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EasyPhysiology - CardiovascularCPP = MAP - ICPFRCA Primary

The cerebral perfusion pressure (CPP) equation is:

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Correct answer: B — CPP = MAP - ICP (or MAP - CVP whichever gives the lower CPP)

CPP = MAP - ICP (or MAP - CVP if CVP > ICP). Normal CPP is 70-100 mmHg. CPP <50 mmHg risks cerebral ischaemia. The target in traumatic brain injury is CPP 60-70 mmHg (maintaining MAP with vasopressors if needed and treating raised ICP). Lund concept targets lower CPP of 50-60 mmHg.

Reference: Power Kam 2018 Principles of Physiology for the Anaesthetist