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Proceedings Paper

Measurement of plethysmogram and diagnosis of stress by using photosensor
Author(s): Toshihiro Shimizu; Daiji Koike; Toyokatsu Sasaki
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Paper Abstract

The plethysmograph, which can measure plethysmogram, velocity plethysmogram and acceleration plethysmogram, is designed. The plethysmogram of fingertip is measured by photocensor. Some artificial stress is imposed on subjects and the plethysmogram is measured before and after the stress is put on. The plethysmogram is analyzed by plotting the return map in chaos theory, which enables us to discuss the characteristics of stress clearly in a visual way. The fractal dimension of the plethysmogram as a time series is also calculated to discuss complexity of the plethysmogram quantitatively. It is shown to be useful to the diagnosis of heart disease.

Paper Details

Date Published: 17 June 2003
PDF: 9 pages
Proc. SPIE 5129, Fundamental Problems of Optoelectronics and Microelectronics, (17 June 2003); doi: 10.1117/12.501652
Show Author Affiliations
Toshihiro Shimizu, Kokushikan Univ. (Japan)
Daiji Koike, Kokushikan Univ. (Japan)
Toyokatsu Sasaki, Kokushikan Univ. (Japan)


Published in SPIE Proceedings Vol. 5129:
Fundamental Problems of Optoelectronics and Microelectronics
Yuri N. Kulchin; Oleg B. Vitrik, Editor(s)

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