Why the study?
What is the normal variation in bilateral upper-extremity blood pressure measurements in ambulatory emergency department patients?
Population
610 ambulatory patients seen at a university hospital emergency department
Design
Cross-sectional
Authors
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Common interarm BP differences in ambulatory ED patients may confound aortic dissection evaluation; leaves open its diagnostic specificity.
What is the normal variation in bilateral upper-extremity blood pressure measurements in ambulatory emergency department patients?
There is a wide degree of normal variation in interarm blood pressure, with 19% of ambulatory ED patients having a difference >20 mm Hg, which may confound its use as a specific sign for aortic dissection.
Adam J. Singer (1996) studied this question.
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