Noninvasive device for photoelectrically measuring the property of arterial blood
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United States of America Patent
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May 6, 1986
Grant Date -
N/A
app pub date -
Feb 17, 1983
filing date -
Feb 19, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A noninvasive device for photoelectrically measuring a property of arterial blood is provided. Light that contacts living tissue with arterial blood is converted into a pair of electrical signals. The electrical signals are processed to provide information of the amplitude of the measured signals and are further processed to produce a final output signal that is substantially a square function of a ratio between the electrical signals representative of the amplitudes.
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