A patient in the emergency department has blood pressure 90/60 mmHg. What is the mean arterial pressure?
Answer and explanation
Correct answer: C. 70 mmHg
- Step 1: MAP = (systolic + 2 x diastolic) / 3.
- Step 2: MAP = (90 + 2 x 60) / 3 = 70 mmHg.
Answer
70 mmHg.
Why not the others: '75 mmHg' averages systolic and diastolic pressure without weighting diastole; '80 mmHg' weights systole twice instead of diastole; '30 mmHg' is the pulse pressure, not the mean arterial pressure.
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