Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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On Study of Pulse Wave Signal According to Postural Change Using Finger Plethysmography

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  • Choi, B.C. (Dept. of Interdisciplinary program in Biomedical Eng., Pusan National Univ.) ;
  • Kim, C.H. (Clinical Medicine Research Institute, Dong-A Univ.) ;
  • Jung, D.K. (Dept. of Physiology, College of Medicine. Dong-A Univ.) ;
  • Suh, D.J. (Dept. of Physiology, College of Medicine. Dong-A Univ.)
  • 최병철 (부산대학교 의공학협동과정) ;
  • 김철한 (동아대학교 임상의학연구소) ;
  • 정동근 (동아대학교 의과대학 생리학교실) ;
  • 서덕준 (동아대학교 의과대학 생리학교실)
  • Published : 1998.11.20
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Abstract

Pulse conduction velocity is determined by areterial compliance, which is changed by lateral pressure of arterial wall. Hydrostatic pressure of the limb vessel is changed by body position, especially in elevated arm. The arterial pulse in the finger causes the blood volume to change, changing the optical density of the blood. Photoplethysmograph of index finger was obtained by LED and phototransistor. Pulse transmission time(PTT) was measured by the interval between the peak of ECG R wave and the peak of the finger plethysmogram. PTT was increased by upward position of arm, and decreased by downward position of the arm compared to horizontal position. This result suggests that relationship between finger plethysmography and postural change could be applied to evaluate clinical cardiovascular status.

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