906-0731-01 Rev. J ZOLL Portable Critical Care Ventilator 2-33Saturation Transform (DST™) plot of relative output power versus possible SpO2 value asshown in the following figure where R corresponds to SpO2 = 97%:Pulse Oximeter Discrete Saturation TransformationThe DST plot has two peaks: the peak corresponding to the higher saturation is selected as theSpO2 value. This entire sequence is repeated once every two seconds on the most recent fourseconds of raw data. The MS board SpO 2 therefore corresponds to a running average of arterialhemoglobin that is updated every two seconds.
