Jinsi ya kukokotoa Mean Arterial Pressure
Mean Arterial Pressure ni nini?
Mean arterial pressure represents average blood pressure throughout the cardiac cycle. It's calculated from systolic and diastolic pressures.
Fomula
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
Mwongozo wa Hatua kwa Hatua
- 1Calculate: MAP = DBP + (SBP - DBP)/3 or MAP = (SBP + 2×DBP)/3
- 2Normal MAP ≈ 90 mmHg in adults
- 3MAP <60 mmHg risks end-organ damage
Mifano Iliyotatuliwa
Ingizo
SBP 120, DBP 80
Matokeo
MAP = 93 mmHg (normal)
Also can use (120 + 160)/3
Makosa ya Kawaida ya Kuepuka
- ✕Treating MAP as if it directly correlates to systolic (it doesn't)
- ✕Forgetting that diastolic weighs more than systolic in formula
Maswali yanayoulizwa mara kwa mara
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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