Why the study?
Can mean, systolic, and diastolic blood pressure be accurately determined from the oscillometric curve in a numerical model?
Can mean, systolic, and diastolic blood pressure be accurately determined from the oscillometric curve in a numerical model?
A numerical model demonstrates that while mean blood pressure can be accurately predicted from oscillometric peaks with corrections, systolic and diastolic pressures are sensitive to waveform variations and cannot be reliably determined using fixed amplitude ratios.
Caution advised on fixed-ratio systolic/diastolic estimates in oscillometry; numerical models leave open clinical validation of corrected mean pressure derivation.
A theoretical model of oscillometric blood pressure measurement is presented. Particular emphasis is paid to the collapse behavior of the artery, and an exponential volume-pressure curve is used. The results of this study suggest that mean blood pressure can be accurately predicted from the peak of the oscillometric curve if corrections related to the cuff pressure waveform are applied. It is also shown, however, that systolic and diastolic pressure may not in general be accurately determined from fixed amplitude ratios based on the oscillometric peak due to the sensitivity of the method to variations in blood pressure waveform, pulse pressure, and arterial compliance. No simple procedures are found to correct for these effects.
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Forster et al. (1986) studied this question.