Abstract
The noninvasive methods for measuring blood oxygen saturation were reviewed, including tayor series expansion model, near infrared spectroscopy,oxygenation index (IOX) and multiple regression analysis aided by monte carlo simulation. Moreover the advantages and disadvantages of each method were discussed. Based on the mechanism of photodynamic therapy(PDT), a modified IOX method was developed, and the preliminary result indicates this method could monitor the changes of blood oxygen saturation in process of PDT treatment for port wine stain(PWS).
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