Apparatus and method for determining oxygen saturation levels wi

Details Apparatus and method for determining oxygen saturation levels wi Apparatus and method for determining oxygen saturation levels wi

1983-02-16

1986-11-18

McGraw, Vincent P.

Optics: measuring and testing

Blood analysis

Hemoglobin concentration

128634, G01N 3348, G01N 3372

Patent

active

046232486

ABSTRACT:
A catheter oximeter includes a fiber optic catheter for supplying radiation to blood under test at a plurality of wavelengths and detecting the intensities of the radiation back-scattered from the blood at each of the wavelengths. The oxygen saturation level of the blood is then computed by deriving it with a formula which uses the ratio of one pair of intensity signals when the oxygen saturation level is relatively low and with a formula which uses the ratio of another pair of intensity signals when the oxygen saturation level relatively is high.

REFERENCES:
patent: 3847483 (1974-11-01), Shaw et al.
patent: 4114604 (1978-09-01), Shaw et al.

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