Rad-57 Signal Extraction Pulse CO-Oximeter Operator’s Manual
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4
Operation
Numeric Display - SpCO (upgraded Instrument)
A stable SpCO reading is associated with correct sensor placement, small physiological changes during
the measurement and acceptable levels of arterial perfusion at the measurement site. Physiological
changes at the measurement site are mainly caused by fluctuations in the oxygen saturation, blood
concentration and perfusion.
Inaccurate SpCO and SpMet readings can be caused by:
■ Improper sensor application
■ Intravascular dyes such as indocyanine green or methylene blue
■ Abnormal hemoglobin levels
■ Low arterial perfusion
■ Low arterial oxygen saturation levels including altitude induced hypoxemia
■ Elevated total bilirubin levels
■ Motion artifact
■ SpCO readings may not be provided if SpO2 readings are less than 90%
■ SpCO readings may not be provided if SpMet readings are greater than 2%
■ Elevated levels of bilirubin
■ Motion artifact
■ Low arterial oxygen saturation levels including altitude induced hypoxemia
Numeric Display - SpMet (upgraded Instrument)
A stable SpMet reading is associated with correct sensor placement, small physiological changes
during the measurement and acceptable levels of arterial perfusion at the measurement site.
Physiological changes at the measurement site are mainly caused by fluctuations in the oxygen
saturation, blood concentration and perfusion.
Inaccurate SpMet readings can be caused by:
■ Improper sensor application
■ Intravascular dyes such as indocyanine green or methylene blue
■ Abnormal hemoglobin levels
■ Low arterial perfusion
■ Low arterial oxygen saturation levels including altitude induced hypoxemia
■ Elevated total bilirubin levels
■ Motion artifact
■ SpCO readings may not be provided if SpO2 readings are less than 90%
■ SpCO readings may not be provided if SpMet readings are greater than 2%
■ Elevated levels of bilirubin
■ Motion artifact
■ Low arterial oxygen saturation levels including altitude induced hypoxemia
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