🩸 Mean Arterial Pressure (MAP) Calculator

When to use

Bedside estimate of perfusion pressure. An arterial line gives the true MAP.

How it works

MAP ≈ DBP + (SBP − DBP)/3. A common resuscitation target is MAP ≥ 65 mmHg.

Key points

• MAP < 65 mmHg suggests inadequate organ perfusion.
• The 1/3 estimate is least accurate at high heart rates.
• Targets are individualised (e.g. higher in chronic hypertension).

References

• Surviving Sepsis Campaign guidelines (MAP ≥ 65 mmHg target)

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