Comparison of Arterial Oxygen Saturation Measured by Pulse Oximetry at Different Sensor Sites in Neurocritical Patients

Purpose : This study aimed to compare peripheral pulse oxygen saturation (SpO<sub>2</sub>) values, measured at different monitoring sites, and arterial (SaO<sub>2</sub>) of neurocritical patients.Methods The included 110 patients admitted the neurosurgical intensive care unit a university hospital. patients’ SpO<sub>2</sub> values were in their index fingers, both second toes, earlobes, foreheads, using patient system. These compared with standard value SaO<sub>2</sub> blood gas analyzer. Data analyzed descriptive Pearson’s correlation coefficients, Lin’s concordance coefficients (CCC), Bland-Altman plots.Result Regardless measuring site, was correlated paired measurements (r=.40~.60, <i>p</i>＜.001, CCC range=.40~.58). No significant bias observed all sites (-0.06~0.19%, <i>p</i>＞.05). left finger right earlobe had narrowest range, 95% limits agreement (LOA) (left -3.04~2.93% -3.18~2.79%). finger, on side without an catheter, narrower range LOA than that opposing (-3.00~2.97% vs. -3.73~3.26%).Conclusion catheter highest level precision. suggests for oximetry patients.