Blood constituent measuring device and method
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United States of America Patent
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-
Aug 14, 1990
Issued Date -
N/A
app pub date -
Dec 15, 1989
filing date -
Jul 22, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and device are disclosed for the detection of the relative percentage of at least one light absorber in the blood stream of living tissue. The method and device are based upon the employment of a narrow band width amplifier and pulses of different wavelength light sources wherein the frequency of the pulses of the light sources are selected so that a large component of the signal falls within the frequency of the narrow band amplifier, so that there is reduced likelyhood of interference from extraneous electromagnetic waves.
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