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Applied Optics

Applied Optics


  • Vol. 33, Iss. 7 — Mar. 1, 1994
  • pp: 1279–1285

Diffusion-based model of pulse oximetry: in vitro and in vivo comparisons

David R. Marble, David H. Burns, and Peter W. Cheung  »View Author Affiliations

Applied Optics, Vol. 33, Issue 7, pp. 1279-1285 (1994)

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A model of pulse oximetry is developed based on the three-dimensional photon diffusion theory. To test the applicability of the model, an in vitro assay was developed. Three different scattering levels and six different relative dye concentrations were analyzed. Average percent errors of 13.9% were obtained over the full range of the study. An in vivo clinical study of two pulse oximeter probes with different spectral characteristics was compared with results estimated by the model. The model correctly predicted the changes in pulse oximeter response resulting from the wavelength changes. A χ2 test gave a probability of 20% that the model fit the data. These results demonstrated the utility of the photon diffusion theory for the modeling of tissue optics.

© 1994 Optical Society of America

Original Manuscript: June 9, 1992
Revised Manuscript: February 22, 1993
Published: March 1, 1994

David R. Marble, David H. Burns, and Peter W. Cheung, "Diffusion-based model of pulse oximetry: in vitro and in vivo comparisons," Appl. Opt. 33, 1279-1285 (1994)

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