Oximeter Series
PULSE OXIMETER INSTRUCTION
MANUAL
21
considered reliable and accurate if the following conditions are
present during measurement:
Shock or cardiac arrest
Extreme temperature of the digit
After the administration of a cardiovascular drug
Anemia
Evidence of ventilation-perfusion mismatch
2.5.2 Instrument performance depends on the wavelength
absorption for oxyhemoglobin and deoxyhemoglobin. If there
are substances absorbing the same wavelength, this would
induce false or low SpO
2
values. The following may affect these
values:
carboxyhemoglobin
methemoglobin
methylene blue
Indigo carmine
2.5.3 Extremely high illumination could affect the SpO
2
measurement. Use a semi-translucent or opaque cover to shield
the sensor.
2.5.4 Other factors
a) High-frequency electrosurgical interference from external
devices, including defibrillators.
