Apparatus and method for measuring blood oxygen saturation
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United States of America Patent
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May 8, 1984
Grant Date -
N/A
app pub date -
Feb 27, 1981
filing date -
Feb 27, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device and method for measuring blood characteristics and parameters, especially arterial, venous, or differential blood oxygen saturation levels uses one or two probes containing a unique configuration of light emitters of two different wavelengths, and sensors which alternately illuminate and read reflected light from blood passing through a specially-designed cuvette. Electronic comparison of reflected radiation received by the probes produces a voltage which is linearly related to blood oxygen saturation level. An opto-electronic feedback network compensates for differences in blood optical density.
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