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.

Type

Journal article

Journal

J Biomed Eng

Publication Date

01/1991

Volume

13

Pages

61 - 66

Keywords

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