Key result
A novel approach combining oscillometric and continuous arterial pulse waveforms characterized blood pressure variability and detected outliers without bias compared to conventional methods.
Why the study?
Does a new approach using simultaneous oscillometric and continuous arterial pulse waveforms improve blood pressure characterization and outlier detection compared to conventional oscillometric methods in healthy subjects?
Does a new approach using simultaneous oscillometric and continuous arterial pulse waveforms improve blood pressure characterization and outlier detection compared to conventional oscillometric methods in healthy subjects?
A novel approach combining oscillometric and continuous arterial pulse waveforms can characterize natural blood pressure variability and detect outliers without bias compared to standard methods.
Should not yet change clinical BP assessment; leaves open utility of combined waveforms for variability characterization beyond healthy subjects.
Current noninvasive blood pressure (BP) measurement methods, such as the oscillometric method, estimate the systolic and diastolic blood pressure (SBP and DBP) at two random instants in time and do not take into account the natural variability in BP. The standard for automated BP devices sets a maximum allowable system error of ±5 mmHg, even though natural BP variability often exceeds these limits. This paper proposes a new approach using simultaneous recordings of the oscillometric and continuous arterial pulse waveforms to augment the conventional noninvasive measurement by providing (1) the mean SBP and DBP over the measurement interval and the associated confidence intervals of the mean, (2) the standard deviation of SBP and DBP over the measurement interval, which indicates the degree of fluctuation in BP and (3) an indicator as to whether or not the oscillometric reading is an outlier. Recordings with healthy subjects demonstrate the potential utility of this approach to characterize BP, to detect outlier measurements, and that it does not suffer from bias relative to the conventional oscillometric method.
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Soueidan et al. (2012) studied Healthy subjects. Simultaneous recordings of oscillometric and continuous arterial pulse waveforms vs. Conventional oscillometric method was evaluated on Bias relative to the conventional oscillometric method and detection of outlier measurements. A novel approach combining oscillometric and continuous arterial pulse waveforms characterized blood pressure variability and detected outliers without bias compared to conventional methods.
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