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Rad-57 Signal Extraction Pulse CO-Oximeter Operator’s Manual
4
Operation
■ Externally applied coloring (such as nail polish)
■ Elevated levels of bilirubin
■ Severe anemia
■ Low arterial perfusion
■ Motion artifact
Numeric Display - Pulse Rate
The Pulse Rate displayed on the Rad-57 may differ slightly from the heart rate displayed on ECG
monitors due to differences in averaging times. There may also be a discrepancy between cardiac
electrical activity and peripheral arterial pulsation. Significant differences may indicate a problem with
the Signal IQ due to physiological changes in the patient or one of the devices or application of the
sensor or patient cable. The pulsations from intra-aortic balloon support can be additive to the pulse
rate displayed on the Pulse CO-Oximeter. Inaccurate measurements may be caused by
■ Intravascular dyes such as indocyanine green or methylene blue
■ Arrhythmias
■ Intra-aortic balloon support
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