Alternate pulse oximetry algorithms for SpO/sub 2/ computation

Arterial oxyhemoglobin saturation (SpO/sub 2/) values are currently computed using weighted moving average techniques. Digital signal processing algorithms were explored to identify improved algorithms for SpO/sub 2/ computation. The fast Fourier transform and discrete cosine transform were identified as potentially superior algorithms. Improvements to the original algorithm using combinations of overlapped processing and averaging techniques were also explored.<
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