Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Variation Factor Assessment of Radial Artery Pulse by the Tonometry Angle of the Pulse Pressure Sensor

토노메트리 방식 맥파 측정의 가압 각도에 따른 변동성 평가

  • Jung, Chang Jin (KM Fundamental Research Division, Korea Institute of Oriental Medicine (KIOM)) ;
  • Jo, Jung Hee (KM Fundamental Research Division, Korea Institute of Oriental Medicine (KIOM)) ;
  • Jun, Min-Ho (KM Fundamental Research Division, Korea Institute of Oriental Medicine (KIOM)) ;
  • Jeon, Young Ju (KM Fundamental Research Division, Korea Institute of Oriental Medicine (KIOM)) ;
  • Kim, Young-Min (KM Fundamental Research Division, Korea Institute of Oriental Medicine (KIOM))
  • 정창진 (한국한의학연구원 한의기반연구부) ;
  • 조정희 (한국한의학연구원 한의기반연구부) ;
  • 전민호 (한국한의학연구원 한의기반연구부) ;
  • 전영주 (한국한의학연구원 한의기반연구부) ;
  • 김영민 (한국한의학연구원 한의기반연구부)
  • Received : 2016.02.15
  • Accepted : 2016.03.28
  • Published : 2016.03.31
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Abstract

A pulse measurement by tonometry provides useful information for diagnosis, including not only blood pressure and heart rate but also parameters for estimating a condition of the cardiovascular system. Currently, various pulse measurement devices based on the tonometry have been developed. A reliability of these devices is determined by a positioning technic between the sensor and the blood vessel and a controlling technique of the pressurization level. An angle of the sensor for the pulse measurement seems to be highly related with a measured signal, however, the objective studies for this issue have been not published. In this paper, the variation of the pulse signals by tonometry direction was experimentally assessed according to the angle of the sensor. In order for guaranteeing the repeatability of the experiment, we used a pulse generator device, which can generate human pulse signal by using silicon tube and fluid pump, and developed a structure for precise adjustment of the angle and the pressurization level of the sensor. The angle of the sensor was acquired by an inclinometer, which was attached at the opposite side of the sensor. As results, a coefficient of variation (CV) of a maximum amplitude (MA) of the pulse wave was largely increased over the angle range of $-9{\sim}9^{\circ}$. Furthermore, the changes of the pulse shape showed different aspects according to the sign of the angle tilted along the blood vessel. It is expected that the results of this study can be helpful for developing more precise pulse measurement devices based on the tonometry and applying in clinic.

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References

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