Sensor, method and device for optical blood oximetry
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United States of America Patent
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Feb 29, 2000
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N/A
app pub date -
Jul 9, 1998
filing date -
Jun 9, 1995
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Abstract
There is described a new sensor for optical blood oximetry as well as a method and apparatus in which the new sensor is used. The new sensor includes two point-like light emitters (23,24) positioned in the center of the device in close proximity to each other and at least one and preferably two annular detector terminals (32,39) concentrically surrounding the light emitters. The light sources may, for example, be two laser diodes emitting each monochromatic light within the range of 670 nm to 940 nm. The detector devices are, for example, photodetectors.
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