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. Author manuscript; available in PMC: 2018 Aug 27.
Published in final edited form as: Blood Purif. 2016 Jan 15;41(1-3):177–187. doi: 10.1159/000441271

Table 1.

Devices for measuring SO2 in HD

Device Measurement principle Reported parameter
Pulse oximeter Different light-absorption spectra for HgbO2 and deoxygenated Hgb % hemoglobin oxygen saturation
Near-infrared spectroscopy Different light-absorption spectra for HgbO2 and deoxygenated Hgb in the infrared spectrum % oxygen linked to Hgb, myoglobin and CrOx in tissue
CritLine Monitor™ Different light-absorption spectra for HgbO2 and deoxygenated Hgb % hemoglobin oxygen saturation
Blood gas analyzer PaO2 is obtained by an electrode that measures electrical currents generated by oxidation-reduction reactions; % hemoglobin oxygen saturation is then computed based on empiric algorithms which may differ between manufacturers PaO2 and % hemoglobin oxygen saturation

HgbO2 = Oxygenated hemoglobin; CrOx = cytochrome oxidase.