Measurement of plethysmogram and diagnosis of stress by using photosensor

Toshihiro Shimizu; Daiji Koike; Toyokatsu Sasaki

doi:10.1117/12.501652

17 June 2003 Measurement of plethysmogram and diagnosis of stress by using photosensor

Toshihiro Shimizu, Daiji Koike, Toyokatsu Sasaki

Proceedings Volume 5129, Fundamental Problems of Optoelectronics and Microelectronics; (2003) https://doi.org/10.1117/12.501652
Event: Fundamental Problems of Optoelectronics and Microelectronics, 2002, Vladivostok, Russian Federation

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.

Citation Download Citation

Toshihiro Shimizu, Daiji Koike, and Toyokatsu Sasaki "Measurement of plethysmogram and diagnosis of stress by using photosensor", Proc. SPIE 5129, Fundamental Problems of Optoelectronics and Microelectronics, (17 June 2003); https://doi.org/10.1117/12.501652

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