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The effect of a number of physiological parameters on pulse oximetry accuracy has been investigated in an in vitro model. We have found that above 50% saturation, pulse oximeters will not be affected by variations in haematocrit, blood flow rate, tissue blood content and pulse amplitude. At low saturations, however, it is known that the accuracy of pulse oximeters decreases and our in vitro results suggest how this may be corrected.


Journal article


J Biomed Eng

Publication Date





61 - 66


Blood Flow Velocity, Hematocrit, Models, Cardiovascular, Oximetry, Pulsatile Flow