Sensor, method and device for optical blood oximetry

Details Sensor, method and device for optical blood oximetry Sensor, method and device for optical blood oximetry

A - Human Necessities

61

B

A61B 5/1455 (2006.01)

Patent

CA 2221968

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.

L'invention concerne un nouveau capteur d'oxymétrie optique du sang, ainsi qu'un procédé et un appareil qui comprend le nouveau capteur. Le nouveau capteur comprend deux émetteurs ponctuels de lumière positionnés au centre du dispositif, à étroite proximité l'un de l'autre, et au moins une, de préférence deux bornes annulaires de détection qui entourent concentriquement les émetteurs de lumière. Les sources de lumière peuvent être par exemple deux diodes laser qui émettent chacune une lumière monochromatique dans une plage comprise entre 670 et 940 nm. Les dispositifs détecteurs sont par exemple des photodiodes.

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