Question

What gets affected by lower saturation?

(a) blood flow

(b) translucency

(c) accuracy

(d) low atmospheric pressure

This question was posed to me during an interview for a job.

I'm obligated to ask this question of Electroencephalograph (EEG) topic in division Biomedical Recorders of Biomedical Instrumentation

Answer 1

Right choice is (c) accuracy

For explanation: An accuracy of 1% or better has been reported for the saturation range of above 80% for most transmission type pulse oximeters. Usually, the accuracy is less at lower saturation because of non-linear effects of absorption.