The nurse is working on a clinical research study, obtaining data evaluating central aortic systolic pressure and brachial arm systolic pressure. The client notes difference in the readings. Which response by the nurse is most accurate?
A) "The difference is due to machine calibration."
B) "The difference is due to the location of pressure measurement."
C) "The difference is due to the discomfort caused by the measurement procedure."
D) "The difference is due to the constrictive force on the arteries when the measurement is taken."
B
Feedback:
Central aortic systolic pressure results, reflecting pressure at the root of the aorta, can be documented as 30 mm Hg lower than when corresponding results obtained at the brachial arm. The differences are not due to machine calibration, discomfort, or constriction of the arteries.
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