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Proceedings Paper

Real time monitoring of pulsatile change in hemoglobin concentrations of cerebral tissue by a portable tissue oximeter with a 10-Hz sampling rate
Author(s): Toshikazu Shiga; Eiichi Chihara; Kazuhisa Tanabe; Yoshifumi Tanaka; Katsuyuki Yamamoto
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Paper Abstract

A portable CW tissue oximeter of a 10-Hz sampling rate was developed for examination of pulsatile components of the output signals as a mean of checking the signal reliability during long-term monitoring. Feasible studies were performed on a healthy subject. Changes in Hb and HbO2 signals of cerebral tissue were continuously measured by placing a photoprobe on the forehead during 6-hour sleep. Pulsatile changes in Hb and HbO2 were steadily observed over a whole period of the recording. The phase relation of pulsation in Hb and HbO2 was almost inverse. Not only information for reliable monitoring but also physiological parameters with respect to cerebral circulation and metabolism could be obtained by measuring the pulsatile components.

Paper Details

Date Published: 1 January 1998
PDF: 8 pages
Proc. SPIE 3194, Photon Propagation in Tissues III, (1 January 1998); doi: 10.1117/12.301085
Show Author Affiliations
Toshikazu Shiga, Omron Institute of Life Science Co., Ltd. (Japan)
Eiichi Chihara, Meiji Univ. of Oriental Medicine (Japan)
Kazuhisa Tanabe, Omron Institute of Life Science Co., Ltd. (Japan)
Yoshifumi Tanaka, Kyoto Prefectural Univ. of Medicine (Japan)
Katsuyuki Yamamoto, Hokkaido Univ. (Japan)


Published in SPIE Proceedings Vol. 3194:
Photon Propagation in Tissues III
David A. Benaron M.D.; Britton Chance; Marco Ferrari, Editor(s)

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