Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Implementation of Impedance Method to Estimate Blood Flow Variation with Cuff Pressure Change

커프 압력 조절에 따른 혈류량 변화 평가를 위한 임피던스법의 구현

  • Jeong, Do-Un (Dept. of Interdisciplinary Program in Biomedical Engineering, Pusan National University) ;
  • Bae, Jin-Woo (Dept. of Interdisciplinary Program in Biomedical Engineering, Pusan National University) ;
  • Shon, Jung-Man (Dept. of Interdisciplinary Program in Biomedical Engineering, Pusan National University) ;
  • Yae, Su-Yung (Dept. of Interdisciplinary Program in Biomedical Engineering, Pusan National University) ;
  • Choi, Byeong-Cheol (Dept. of Biomedical Engineering, Choonhae College) ;
  • Nam, Ki-Gon (Dept. of Electronic Engineering, College of Engineering, Pusan National University) ;
  • Kim, Cheol-Han (Dept. of Electronic Engineering, College of Engineering, Pusan National University) ;
  • Jeon, Gye-Rok (Dept. of Biomedical Engineering, College of Medicine, Pusan National University)
  • 정도운 (부산대학교 대학원 의공학협동과정) ;
  • 배진우 (부산대학교 대학원 의공학협동과정) ;
  • 손정만 (부산대학교 대학원 의공학협동과정) ;
  • 예수영 (부산대학교 대학원 의공학협동과정) ;
  • 최병철 (춘해대학 의료공학과) ;
  • 남기곤 (부산대학교 공과대학 전자공학과) ;
  • 김철한 (부산대학교 공과대학 전자공학과) ;
  • 전계록 (부산대학교 의과대학 의공학교실)
  • Published : 2004.11.30
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Abstract

In this study, we measured the blood flow on arm by non-invasive method and implemented a system to measure variation of the blood flow by estimating bio-electrical impedance and arterial pressure according to cuff pressure. The implemented system measured impedance variation according to pressure variation applied by artificial cuff pressure on the measuring position. The system consisted of pressure measuring part and impedance measuring part using 4-electrode method. Pressure measuring part was composed of semiconductor pressure sensor and electronic circuit for signal processing of sensor output signal. In addition, impedance measuring part was composed of constant current source circuit and lock-in amplifier for detecting impedance signal. We conducted experiments of impedance measuring part using standard resistance for performance evaluation of the implemented system. In addition we experimented to estimate variation of the blood flow by measuring impedances of the experimental group. We estimated ratio of the blood flow resistance using mean arterial pressure and variation of the blood flow. As a result the ratio of the blood flow resistance and variation of blood flow were in an inverse relationship with each other and the correlation coefficient was -0.96776.

Keywords

References

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