Key result
Filters used to extract oscillometric pulses altered pulse shape and shifted the amplitude envelope in human subjects compared with unfiltered pulses, but not in a test simulator.
Population
A noninvasive blood pressure test simulator and three volunteers.
Comparison
Filters used to extract oscillometric pulses… vs Unfiltered oscillometric pulses
Design
Other
Authors
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Filtering may compromise oscillometric BP accuracy in humans; leaves open whether simulators adequately validate devices.
Filters in oscillometric blood pressure monitors alter pulse shapes in human subjects, which may affect the accuracy of pressure determination and explain discrepancies with simulator validations.
John Amoore (2006) studied this question. Filtered oscillometric pulses vs. Unfiltered oscillometric pulses was evaluated on Oscillometric pulse shape and amplitude envelope shift. Filters used to extract oscillometric pulses altered pulse shape and shifted the amplitude envelope in human subjects compared with unfiltered pulses, but not in a test simulator.
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