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.

Original publication

DOI

10.1016/0141-5425(91)90046-a

Type

Journal article

Journal

Journal of biomedical engineering

Publication Date

01/1991

Volume

13

Pages

61 - 66

Addresses

Department of Engineering Science, Oxford University, UK.

Keywords

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