Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Blood Pressure Measurement using the Modified Step-wise Deflation Method

개선된 계단 배기 방법을 이용한 혈압 측정

  • Oh, Hong-Sic (Department of Biomedical Engineering, Hanyang University) ;
  • Lee, Jong-Shill (Department of Biomedical Engineering, Hanyang University) ;
  • Chee, Young-Joon (Department of Biomedical Engineering, College of Engineering, University of Ulsan) ;
  • Kim, In-Young (Department of Biomedical Engineering, Hanyang University)
  • 오홍식 (한양대학교 의용생체공학과) ;
  • 이종실 (한양대학교 의용생체공학과) ;
  • 지영준 (울산대학교 공과대학 의공학과) ;
  • 김인영 (한양대학교 의용생체공학과)
  • Received : 2010.03.10
  • Accepted : 2010.09.20
  • Published : 2010.10.31
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Abstract

In the automatic non-invasive blood pressure measurement device, the oscillometric method iswidely used. In the oscillometric method, the step-wise deflation has the advantage of the robustness for the motion artifacts than the linear deflation method. But it has the disadvantage of its longer measurement time because we need to detect two or more pulses in a certain cuff pressure step. In this study, we suggest the modified step-wise deflation method to overcome this limitation while maintaining the general concept of step-wise deflation. Using one valid pulse in each step and the deflating valve control during the diastolic period, the measurement time could be reduced. In order to verify the accuracy of the proposed algorithm, we compared the blood pressure values from the suggested method and the blood pressure values from the conventional auscultation method. The mean and standard deviation were -0.50${\pm}$5.3mmHg and 2.08${\pm}$4.75mmHg, for systolic and diastolic blood pressure respectively. The measurement time can be reduced up to the half of conventional step-wise deflation method.

Keywords

References

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