Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Implementation of the Blood Pressure and Blood Flow Variation Rate Detection System using Impedance Method

임피던스법을 이용한 혈압 및 혈류 변화량 검출 시스템 구현

  • Ro, Jung-Hoon (Department of Biomedical Engineering, College of Medicine, Pusan National University) ;
  • Bae, Jin-Woo (Automotive Electronic Development Team, SL Co.) ;
  • Ye, Soo-Young (BK21 Medical Science Education Center, College of Medicine, Pusan National University) ;
  • Shin, Bum-Joo (Department of Biomedical Engineering, Pusan National University) ;
  • Jeon, Gye-Rok (Department of Biomedical Engineering, College of Medicine, Pusan National University)
  • 노정훈 (부산대학교 의공학과) ;
  • 배진우 ((주) 에스엘 연구개발부) ;
  • 예수영 (부산대학교 의전원 BK 21) ;
  • 신범주 (부산대학교 바이오메디컬공학과) ;
  • 전계록 (부산대학교 의공학교실)
  • Published : 2009.08.31
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Abstract

In this study, detection system of the blood flow variation rate was implemented using the variation effect of bio electric impedance at time of the blood pressure measurement by means of impedance method. The blood pressure measurement was performed by the oscillometric method. The mean arterial pressure was calculated using maximum amplitude algorithm. The systolic and diastolic pressure were estimated by establishment of the various characteristic ratio according to mean arterial pressure range. Alternative static current source and lock_in amplifier were introduced to impedance measurement. The variation of blood volume was measured using variation bio impedance according to induced cuff pressure at measuring area.

본 연구에서는 혈압 측정 시 생체 임피던스가 변화하는 현상을 이용하여 혈류량 변화를 검출하는 시스템을 구현하였다. 혈압의 측정은 오실로메트릭법을 적용하였으며, MAA 알고리즘을 이용하여 평균 동맥압을 산출한 후 평균 동맥압에 대한 여러 가지 특성비율을 설정하여 수축기 및 이완기 혈압을 추정하였다. 인체 임피던스 측정은 교류 정전류원과 락인-증폭기를 이용하였으며, 측정 부위에 인가되는 커프 압력에 의해 생체 임피던스 변화량을 이용하여 혈류량 변화를 측정하였다.

Keywords

References

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