SYSTEMS AND METHODS FOR DETERMINING OXYGEN SATURATION

摘要

According to embodiments, techniques for using continuous wavelet transforms and spectral transforms to determine oxygen saturation from photoplethysmographic (PPG) signals are disclosed. According to embodiments, a first and a second PPG signals may be received. A spectral transform of the first and the second PPG signals may be performed to produce a first and a second spectral transformed signals. A frequency region associated with a pulse rate of the PPG signals may be identified from the first and the second spectral transformed signals. According to embodiments, a continuous wavelet transform of the first and the second PPG signals may be performed at a scale corresponding to the identified frequency region to produce a first and a second wavelet transformed signals. The oxygen saturation may be determined based at least in part upon the wavelet transformed signals.

主权项

1. A method for determining oxygen saturation from PPG signals, comprising:
receiving a first PPG signal and a second PPG signal; performing a spectral transform of the first and the second PPG signals to produce a first and a second spectral transformed signals; identifying from the first and the second spectral transformed signals a frequency region associated with a pulse rate of the PPG signals; performing a continuous wavelet transform of the first and the second PPG signals at a scale corresponding to the identified frequency region to produce a first and a second wavelet transformed signals; and determining oxygen saturation based at least in part upon the wavelet transformed signals.