User's Manual

Radical-7 Safety Information, Warnings, and Cautions
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Warning
The Radical-7 cannot measure elevated levels of COHb or MetHb.
Warning
Inaccurate SpO2 readings may be caused by:
• Elevated levels of COHb and MetHb
• For increased COHb: COHb levels above normal tend to increase
the level of SpO2. The level of increase is approximately equal
to the amount of COHb that is present.
• Note: High levels of COHb may occur with a seemingly normal
SpO2. When elevated levels of COHb are suspected, laboratory
analysis (CO-Oximetry) of a blood sample should be performed.
• For increased MetHb: the SpO2
may be decreased by levels of MetHb
of up to approximately 10% to 15%. At higher levels of MetHb, the
SpO2 may tend to read in the low to mid 80s. W
hen elevated levels of
MetHb are suspected, laboratory analysis (CO-Oximetry) of a blood
sample should be performed.
• Intravascular dyes such as indocyanine green or methylene blue
• Externally applied coloring and texture such as nail polish, acrylic
nails, glitter, etc.
• Elevated levels of bilirubin
• Severe anemia
• Low arterial perfusion
• Motion artifact