Optics: measuring and testing – Blood analysis – Hemoglobin concentration
Patent
1981-02-27
1984-05-08
Punter, William H.
Optics: measuring and testing
Blood analysis
Hemoglobin concentration
250214AG, 356409, G01N 2127, G01N 3348
Patent
active
044471505
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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Korlev et al., "An Attachment Based on the Method of Disrupted Total Internal Reflection with Partial Compensation of the Variation in the Penetration Depth of the Light Flux," Instru. & Experimental Techniques, vol. 18, #5, Sep.-Oct. 1975, pp. 1562-1564.
Bentley Laboratories
Punter William H.
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