Measurement of pulse oximetry based on dynamic spectroscopy

In the paper, a new way to measure pulse oxygen saturation based on Dynamic spectroscopy (DS) is validated. DS method can promote the accuracy of pulse oximetry evidently. It can eliminate the interference of individual discrepancy and measuring condition in principle. There were 60 patients in the ICU to be collected spectroscopic data and do biochemical analysis. The spectroscopic data was processed to extract DS with D-value estimation method. The support vector regression (SVR) algorithm was used to establish the calibration model of subjects´ oxygen saturation values measured by the biochemical analysis against the DS data including 660nm and 940nm wavelengths. The correlation coefficients and relative error were 0.8138 and ±0.0145 for validation set comparing 0.6230 and ±0.1164 for the same samples measured by the monitor, which is based on the traditional two-wavelength test method. The experimental results establish the efficacy of the proposed method.