Apparatus and method for measuring blood oxygen saturation

Details Apparatus and method for measuring blood oxygen saturation Apparatus and method for measuring blood oxygen saturation

1982-08-20

1984-04-24

McGraw, Vincent P.

Optics: measuring and testing

Sample, specimen, or standard holder or support

Fluid containers

356 41, G01N 2105, G01N 3348

Patent

active

044444982

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.

REFERENCES:
patent: 3020795 (1962-02-01), McKinney et al.
patent: 3029682 (1962-04-01), Wood
patent: 3647299 (1972-03-01), Lavallee
patent: 3773424 (1973-11-01), Selgin
patent: 4243883 (1981-01-01), Schwarzmann

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