Non-invasive oximeter and method

Details Non-invasive oximeter and method Non-invasive oximeter and method

1986-09-26

1989-04-25

Church, Craig E.

Optics: measuring and testing

Blood analysis

Hemoglobin concentration

36441309, 128633, 128637, 128666, G01N 3349, G01N 2135

Patent

active

048242420

ABSTRACT:
The present invention relates to an oximeter for monitoring oxygen saturation of arterial blood. Light of two wavelengths is transmitted through a specimen. Detectors measure the attenuation of light through the specimen to produce two modulating data streams. The data streams are thereafter processed, evaluated, and compared to determine oxygen saturation. A novel method to process, evaluate and compare the two data streams is disclosed.

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Tait et al., "A Theoretical Analysis of Some Errors in Oximetry" IEEE Transactions on Bio-Medical Engineering, vol. BME-13, No. 4, Oct., 1966.
Wood and Garci, "Photoelectric Determination of Arterial Oxygen Saturation in Man" J. Lab. Clin. Med. 34, pp. 387-401 (1949).
Grover, "Improved Extracorporeal Reflectance Oximeter" Conference Proceedings of the 26th Annual Conference on Engineering in Medicine and Biology, Sep. 30-Oct. 4, 1973, p. 275.
Kramer et al., "Influence of Oxygen Saturation, Erythrocyte Concentration and Optical Depth Upon the Red and Near-Infrared Light Transmittance of Whole Blood" American Journal of Physiology, 165:229-246 (1951).
Schibili et al., "An Electronic Circuit for Red/Infrared Oximeters" IEEE Transactions on Bio-Medical Engineering, vol. BME-25, No. 1, Jan., 1978.

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