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The International Journal of Lower Extremity Wounds
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Optical Measurement of Tissue Oxygen Saturation

David K. Harrison, PhD

Regional Medical Physics Department, University Hospital of North Durham, UK, d.k.harrison{at}ncl.ac.uk

Med Habil, FIPEM

Regional Medical Physics Department, University Hospital of North Durham, UK

Advances in opto-electronic systems have meant that optical spectroscopy can now be used for noninvasive measurements in tissue in patients. A number of techniques have evolved over the last 15 years that make use of the characteristic differences in the absorption spectrum of deoxygenated and oxygenated hemoglobin to measure oxygen saturation. This article summarizes, in particular, those techniques that may prove to be applicable to measurements relating to lower extremity wounds. A short introduction is given about existing electrode methods before describing applications of near infrared and visible wavelength spectroscopy to measurements in tissue. The advantages and limitations of these methods are discussed. An example of an area where tissue spectroscopy is now in routine clinical use for tissue healing viability assessment is presented.

Key Words: tissue oxygen • saturation • spectroscopy • healing • hypoxia

The International Journal of Lower Extremity Wounds, Vol. 1, No. 3, 191-201 (2002)
DOI: 10.1177/153473460200100308
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