Multi-wavelength oximeter having a means for disregarding a poor

Details Multi-wavelength oximeter having a means for disregarding a poor Multi-wavelength oximeter having a means for disregarding a poor

1985-02-21

1987-12-22

Rosenberger, R. A.

Optics: measuring and testing

Blood analysis

Hemoglobin concentration

128633, 364416, G01N 3316

Patent

active

047143410

ABSTRACT:
An oximeter for measuring oxygen saturation in arterial blood includes a light source for projecting light to a body member to be measured, a light responsive circuit for receiving the light which has transmitted through said body member and for generating at least first, second and third signals at three different wavelengths, and a calculator for calculating at least first SaO.sub.2 data using first and second signals and second SaO.sub.2 data using first and third signals. It is detected whether or not a difference between the first and second SaO.sub.2 data is within a predetermined level. When the difference is within the predetermined level, it is assumed that the first and/or second SaO.sub.2 data are valid, but if not, they are assumed as invalid.

REFERENCES:
patent: 3638640 (1972-02-01), Shaw
patent: 3998550 (1976-12-01), Konishi et al.
patent: 4086915 (1978-05-01), Kofsky et al.
patent: 4114604 (1976-10-01), Shaw et al.
patent: 4167331 (1979-09-01), Nielsen
patent: 4407290 (1983-10-01), Wilber
patent: 4453218 (1984-06-01), Sperinde et al.
patent: 4586513 (1985-05-01), Hamaguri
Photoelectric Determination of Arterial Oxygen Saturation in Man.
New Contributions to the Optics of Intensely Light-Scattering Materials, Part I, by Paul Kubelka.

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