Skip to main content
placeholder image

A real-time algorithm for the quantification of blood pressure waveforms.

Journal Article


Abstract


  • A real-time algorithm for quantification of biological oscillatory signals, such as arterial blood pressure (BP) is proposed which does not require user intervention and works on waveforms complicated by rapid changes in the mean level, frequency, or by the presence of arrhythmia. The algorithm is based on the continous independent assessment of the refractory period (RP). In the first stage, a sample of the signal is band-pass filtered. During the next stage: 1) the local maxima in the filtered signal are identified and their pulse amplitudes (PA) measured on the side opposite to the possible notch position and 2) those maxima whose PA exceeds some threshold are selected and an array of RP values is formed as a fraction of the moving estimate of the interval between successive selected peaks. Finally, the original signal is analyzed by means of two moving averages (MAs) with short and long averaging time intervals. The true peaks are determined as the maxima between intersections of MAs if the peak-to-peak or the intersection-to-intersection intervals since the previous peak and the previous intersection exceed the RP. The algorithm proved to be superior against three commercially available heartbeat detectors yielding an error rate of 0.09%.

Publication Date


  • 2002

Citation


  • Navakatikyan, M. A., Barrett, C. J., Head, G. A., Ricketts, J. H., & Malpas, S. C. (2002). A real-time algorithm for the quantification of blood pressure waveforms.. IEEE transactions on bio-medical engineering, 49(7), 662-670. doi:10.1109/tbme.2002.1010849

Web Of Science Accession Number


Start Page


  • 662

End Page


  • 670

Volume


  • 49

Issue


  • 7

Abstract


  • A real-time algorithm for quantification of biological oscillatory signals, such as arterial blood pressure (BP) is proposed which does not require user intervention and works on waveforms complicated by rapid changes in the mean level, frequency, or by the presence of arrhythmia. The algorithm is based on the continous independent assessment of the refractory period (RP). In the first stage, a sample of the signal is band-pass filtered. During the next stage: 1) the local maxima in the filtered signal are identified and their pulse amplitudes (PA) measured on the side opposite to the possible notch position and 2) those maxima whose PA exceeds some threshold are selected and an array of RP values is formed as a fraction of the moving estimate of the interval between successive selected peaks. Finally, the original signal is analyzed by means of two moving averages (MAs) with short and long averaging time intervals. The true peaks are determined as the maxima between intersections of MAs if the peak-to-peak or the intersection-to-intersection intervals since the previous peak and the previous intersection exceed the RP. The algorithm proved to be superior against three commercially available heartbeat detectors yielding an error rate of 0.09%.

Publication Date


  • 2002

Citation


  • Navakatikyan, M. A., Barrett, C. J., Head, G. A., Ricketts, J. H., & Malpas, S. C. (2002). A real-time algorithm for the quantification of blood pressure waveforms.. IEEE transactions on bio-medical engineering, 49(7), 662-670. doi:10.1109/tbme.2002.1010849

Web Of Science Accession Number


Start Page


  • 662

End Page


  • 670

Volume


  • 49

Issue


  • 7