Automatic blood pressure monitors are the most important healtlicare products. The abnormal blood pressure values and waveform could indicate many cardiovascular diseases. The pressures measured using oscillometric method, which compared with invasive blood pressure devices, are often slight overestimation in SBP and underestimation in DBP.Recent studies indicated that the continuous pulse volume recording (PVR) could predict the central aortic blood pressure using a transfer function. Therefore, this study was implementing a novel device using the oscillometric method to predict the central aortic blood pressure to measure central blood pressure as well as the SBP, MBP and DBP automatically. The ensemble averaging 10 heart-beats of continuous PVR was used to extract the value of (cSBP), central SBP2 (cSBP2), central pulse pressure (cPP) and incisura point (in-ciP) for central blood pressure calculation. The method estimating the central blood pressure was correlated with the invasive measurement of pressure at aortic root at catheter Lab with high accuracy.
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