The study goal is to establish the correlation of hemoglobin values determined by the noninvasive pulse oximetry-determined hemoglobin (SpHb) system with hemoglobin as measured by other validated devices. The study will also evaluation oxygen reserve index (ORI) to correlate with partial pressure of oxygen (PaO2), and to evaluate pleth variability index (PVI) with stroke volume variation (SVV) or pulse pressure variation (PPV) values.
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Noninvasive Pulse Oximetry-determined SpHb Bias
Timeframe: Duration of study participation is up to three days.
Correlation of PVI Measurement Compared With PPV or SVV
Timeframe: Duration of study participation is up to three days.
Correlation of "ORI" With Partial Pressure of Oxygen (PaO2) "PaO2" Measurement From Blood Gas Analysis
Timeframe: Duration of study participation is up to three days.