Key result
A mathematical model demonstrated that increased arterial stiffness and pulse pressure cause the fixed-ratio method to predict higher systolic and lower diastolic blood pressures.
Population
Mathematical model of oscillometry
Design
Other
Authors
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May bias fixed-ratio oscillometric readings in stiff arteries; leaves open whether algorithms require stiffness adjustment.
Theoretical modeling indicates that arterial stiffness and pulse pressure are major factors that can cause significant errors in oscillometric fixed-ratio blood pressure measurements.
Liu et al. (2012) studied Blood pressure measurement accuracy. Oscillometric fixed-ratio blood pressure measurement method was evaluated on Measurement error in systolic and diastolic blood pressures. A mathematical model demonstrated that increased arterial stiffness and pulse pressure cause the fixed-ratio method to predict higher systolic and lower diastolic blood pressures.
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