User's Manual

Radical-7 Safety Information, Warnings, and Cautions
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Note: 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. When elevated levels of MetHb are suspected, laboratory
analysis (CO-Oximetry) of a blood sample should be performed.
Note: Inaccurate SpO2 readings may be caused by:
 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