User Manual for Wrist Oximeter
-34-
3 Factors affecting
SpO
2
measuring accuracy
(interference reason)
Intravascular dyes such as indocyanine green or
methylene blue
Exposure to excessive illumination, such as surgical
lamps, bilirubin lamps, fluorescent lights, infrared
heating lamps, or direct sunlight.
Vascular dyes or external used color-up product such
as nail enamel or color skin care
Excessive patient movement
Placement of a sensor on an extremity with a blood
pressure cuff, arterial catheter, or intravascular line
Exposure to the chamber with High pressure oxygen
There is an arterial occlusion proximal to the sensor
Blood vessel contraction caused by peripheral vessel
hyperkinesias or body temperature decreasing
