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Skin Reflectance oximeter depends on monitoring backscattered lights in how many wavelengths?

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Skin Reflectance oximeter depends on monitoring backscattered lights in how many wavelengths?

(a) 1

(b) 2

(c) 3

(d) 4

I have been asked this question at a job interview.

Question is from Electromyograph (EMG) topic in portion Biomedical Recorders of Biomedical Instrumentation

1 Answer

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Best answer
The correct option is (b) 2

Easy explanation: The instrument basically depends on monitoring backscattered light from living tissue in two wavelengths. The backscattered light data is then used for the in vivo determination of the blood’s relative oxygen saturation.

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