QuestionSBA
QuestionChoice
This answer is closer to the systolic blood pressure than the diastolic blood pressure. Since we spend more time in diastole than systole, this must be reflected in the mean arterial blood pressure calculation by weighting the diastolic blood pressure more heavily. We must therefore add a third of the pulse pressure to the diastolic pressure (rather than taking a third away from the systolic pressure) in order to give an accurate average of the arterial blood pressure.
10026234
e
123 mmHg
QuestionChoice
The equation to calculate mean arterial blood pressure is (systolic blood pressure - diastolic blood pressure)/3 + diastolic blood pressure. In this case, we therefore do (137-95)/3 + 95 = 109.
10026230
a
109 mmHg
QuestionChoice
This is just halfway between the systolic and diastolic blood pressure. Since we spend more time in diastole than systole, this must be reflected in the mean arterial blood pressure calculation by weighting the diastolic blood pressure more heavily. We must therefore add a third of the pulse pressure (not a half) to the diastolic pressure to give an accurate average of the arterial blood pressure.
10026231
b
116 mmHg
QuestionChoice
This is just the systolic blood pressure. In order to average the mean arterial blood pressure, we must also include the diastolic blood pressure. This is done by first, subtracting systolic - diastolic blood pressure, secondly, dividing by 3, and thirdly adding the diastolic blood pressure - (137-95)/3 + 95 = 109.
10026232
c
137 mmHg
QuestionChoice
This is just the diastolic blood pressure. In order to average the mean arterial blood pressure, we must also include the systolic blood pressure. This is done by first, subtracting systolic - diastolic blood pressure, secondly, dividing by 3, and thirdly adding the diastolic blood pressure - (137-95)/3 + 95 = 109.
10026233
d
95 mmHg
Concept
Chapter
2693
4218
Cardiac Volumes and Arterial Pressure
Topic
159
Cardiovascular physiology
17644
John, a 48-year-old gentleman, presents to the GP with a headache. As part of a routine check-up, a patient's blood pressure is recorded as 137/95 mmHg. Calculate the patient's mean arterial blood pressure.


a