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Mean arterial pressure represents average blood pressure throughout the cardiac cycle. It's calculated from systolic and diastolic pressures.

Formel

Calculate: MAP = DBP + (SBP - DBP)/3 or MAP = (SBP + 2×DBP)/3
MAP
DBP + (SBP - DBP)/3 or MAP = (SBP + 2×DBP)/3 — DBP + (SBP - DBP)/3 or MAP = (SBP + 2×DBP)/3
DBP
(SBP + 2×DBP)/3 — (SBP + 2×DBP)/3
SBP
(SBP + 2×DBP)/3 — (SBP + 2×DBP)/3

Trin-for-trin guide

  1. 1Calculate: MAP = DBP + (SBP - DBP)/3 or MAP = (SBP + 2×DBP)/3
  2. 2Normal MAP ≈ 90 mmHg in adults
  3. 3MAP <60 mmHg risks end-organ damage

Løste eksempler

Input
SBP 120, DBP 80
Resultat
MAP = 93 mmHg (normal)
Also can use (120 + 160)/3

Almindelige fejl at undgå

  • Treating MAP as if it directly correlates to systolic (it doesn't)
  • Forgetting that diastolic weighs more than systolic in formula

Ofte stillede spørgsmål

Why is MAP important?

It better reflects perfusion pressure than systolic alone; organs require minimum MAP (~60 mmHg) to function.

How do vasopressors work?

They increase systolic/diastolic pressure, raising MAP to improve organ perfusion in shock.

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