如何计算Mean Arterial Pressure
learn.whatIsHeading
Mean arterial pressure represents average blood pressure throughout the cardiac cycle. It's calculated from systolic and diastolic pressures.
公式
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
分步指南
- 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
例题解析
输入
SBP 120, DBP 80
结果
MAP = 93 mmHg (normal)
Also can use (120 + 160)/3
常见错误注意事项
- ✕Treating MAP as if it directly correlates to systolic (it doesn't)
- ✕Forgetting that diastolic weighs more than systolic in formula
常见问题
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.
准备好计算了吗？尝试免费的 Mean Arterial Pressure 计算器
自己尝试一下 →