Real time monitoring of pulsatile change in hemoglobin concentrations of cerebral tissue by a portable tissue oximeter with a 10-Hz sampling rate

Toshikazu Shiga; Eiichi Chihara; Kazuhisa Tanabe; Yoshifumi Tanaka; Katsuyuki Yamamoto

doi:10.1117/12.301085

1 January 1998 Real time monitoring of pulsatile change in hemoglobin concentrations of cerebral tissue by a portable tissue oximeter with a 10-Hz sampling rate

Toshikazu Shiga, Eiichi Chihara, Kazuhisa Tanabe, Yoshifumi Tanaka, Katsuyuki Yamamoto

Author Affiliations +

Proceedings Volume 3194, Photon Propagation in Tissues III; (1998) https://doi.org/10.1117/12.301085
Event: BiOS Europe '97, 1997, San Remo, Italy

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.

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Toshikazu Shiga, Eiichi Chihara, Kazuhisa Tanabe, Yoshifumi Tanaka, and Katsuyuki Yamamoto "Real time monitoring of pulsatile change in hemoglobin concentrations of cerebral tissue by a portable tissue oximeter with a 10-Hz sampling rate", Proc. SPIE 3194, Photon Propagation in Tissues III, (1 January 1998); https://doi.org/10.1117/12.301085

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