Surgery – Truss – Pad
Patent
1991-05-16
1993-04-20
Cohen, Lee S.
Surgery
Truss
Pad
128633, A61B 502
Patent
active
052033422
ABSTRACT:
An apparatus for detecting a state of peripheral blood circulation of a subject, including a transmission type blood oxygen saturation measuring device emitting a plurality of lights having different wavelengths toward a subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights transmitted through the subject, and determining a first blood oxygen saturation by using the pulse wave signals corresponding to the transmitted lights; a reflection type blood oxygen saturation measuring device emitting a plurality of lights having different wavelengths toward the subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights reflected from the subject, and determining a second blood oxygen saturation by using the pulse wave signals corresponding to the reflected lights; and a determining device determining a state of peripheral blood circulation of the subject by utilizing a difference between the first and second blood oxygen saturations.
REFERENCES:
patent: 4230122 (1980-10-01), Lubbers et al.
patent: 4784150 (1988-11-01), Voorhies et al.
Laid-open Publication No. 2-111344 of unexamined Japanese Patent Application (published in 1990) abstract only.
Laid-open Publication No. 64-56208 of unexamined Japanese Utility Model Application (published in 1989) abstract only.
Cohen Lee S.
Colin Electronics Co., Ltd.
Pontius Kevin
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