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Measurement Limitations
During operation, the accuracy of oximeter readings can be affected by:
High-frequency electrical noise, including noise created by the host system, or noise from
external sources, such as electrosurgical apparatus connected to the system.
Intravascular dye injections.
Excessive patient movement.
External light radiation.
Improper sensor installation or incorrect contact position of the patient.
SpO
2
probe temperature (optimal temperature between 28°C and 40°C).
Placement of the SpO
2
probe on an extremity that has a blood pressure cuff, arterial catheter,
or intravascular line.
Significant concentrations of dysfunctional hemoglobin, such as carboxyhemoglobin and
methemoglobin.
SpO
2
too low.
Bad circular injection of the part being measured.
It is required to use SpO
2
probe which is provided by our company, contact with our sale
department when changes SpO
2
probe.
Chapter15 Maintenance and Cleaning
Warning
Take cuff and the power source off before cleaning the unit or the SpO
2
probe.
Caution
Do not subject the sensor to autoclaving.
Do not immerse the SpO
2
probe into any liquid.
Do not use any SpO
2
probe or cable that may be damaged or deteriorated.
Cleaning:
Use a cotton ball or a soft mull moistened with hospital-grade ethanol to wipe the surface of
the SpO
2
probe, and then dry it with a cloth. This cleaning method can also be applied to the
luminotron and receiving unit.
The cable can be cleaned with 3% hydrogen dioxide, 70% isopropanol, or other active
reagent. However, connector of the SpO
2
probe shall not be subjected to such solution.
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