Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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A New Method for Unconstrained Pulse Arrival Time (PAT) Measurement on a Chair

  • Kim Ko-Keun (Interdisciplinary Program in Medical and Biological Engineering, Seoul National University) ;
  • Chee Young-Joon (Department of Biomedical Engineering, Hanyang University) ;
  • Lim Yong-Gyu (Advanced Biometric Research Center, Seoul National University) ;
  • Choi Jin-Wook (Department of Biomedical Engineering, College of Medicine, Seoul National University) ;
  • Park Kwang-Suk (Department of Biomedical Engineering, College of Medicine, Seoul National University)
  • Published : 2006.06.01
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Abstract

A new method of measuring pulse arrival time (PAT), which is usually used for the estimation of systolic blood pressure, in an unconstrained manner using a chair, is proposed. The capacitive-coupled ECG (CC-ECG) measurement system and the air cushion with balancing tubes system were used for unconstrained PAT measurement. Firstly, the correlation between the standard PAT (S-PAT) from the photoplethysmography (PPG) and the PAT measured in an unconstrained manner (U-PAT) was evaluated. It was observed that U-PAT, which is the time delay from the R-peak of ECG to the steepest decent point of air cushion pressure wave, is significantly correlated with the S-PAT. Secondly, systolic blood pressure (SBP) measured by the radial tonometer is compared to the U-PAT. The ten-beat averaged U-PAT removed respiration effects and demonstrated a high intra-subject correlation with SBP in all participants. Finally, the tonometry SBP was estimated from these U-PAT values for one participant intermittently during half a day.

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References

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