Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Effects of tissue outside of arterial blood vessels in pulse oximetry: a model of two-dimensional pulsation

Published

Author(s)

Shao Yang, Paul B. Batchelder, Dena M. Raley

Abstract

We describe a new model of pulse oximetry that addresses the disagreement between theoretical calibration curves based on Beer-Lambert's Law and test results based on human test subjects. Sources of this discrepancy include variability among human subjects, experimental conditions and the effect of optical radiation propagating in tissue surrounding arteries. Unlike the conventional model, our model considers the change in the relative proportion of light that does or does not pass through blood in pulsating vessels in addition to the change in the path length of optical radiation through the blood. Theoretical calibration curves based on this model agree with human test results and help to explain the variability between in vitro and in vivo test conditions.
Citation
Journal of Clinical Monitoring and Computing
Volume
21
Issue
6

Keywords

blood absorption, blood oxygen, blood scattering, pulse oximetry, tissue extinction

Citation

Yang, S. , Batchelder, P. and Raley, D. (2007), Effects of tissue outside of arterial blood vessels in pulse oximetry: a model of two-dimensional pulsation, Journal of Clinical Monitoring and Computing, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32790 (Accessed June 18, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created November 30, 2007, Updated October 12, 2021