文件编号：
NR-TP-0715-008
版本：
1.0
- 44 -
High-frequency radio wave interference, such as interference generated by the host
system or interference from electrosurgery instrument connected to the system.
Intravenous dye.
Too frequent movement of the patient.
External light radiation.
Sensor is improperly installed or improperly in contact with the patient.
Sensor temperature (optimum temperature 28°C~42°C).
The sensor is placed on limbs with blood pressure cuff, arterial duct or lumen tube.
Concentration of non-functional hemoglobin such as carboxyhemoglobin (COHb) and
methemoglobin (MetHb).
SpO2 too low.
Poor perfusion of test site.
Shock, anemia, hypothermia, and the application of vasoconstrictor drugs may reduce
the arterial blood flow to a level that can not be measured.
The measurement also depends on the absorption of specific wavelengths of light by
oxyhemoglobin and reduced hemoglobin. If there is any other substance that absorbs the
same wavelength, the measurement may have false or low SPO2 values, such as: carbon
hemoglobin, methemoglobin, methylene blue, and indigo carmine.
SPO2 probe described in Annex is recommended.
Operating environment limit: Operating temperature range: 0
～
45
℃
, Humidity range:
0~85% (non-condensing), Elevation range: -500m~5000m.
