18
149
18Monitoring SpO2
FM30/40/50 The pulse oximetry measurement (SpO
2
) is intended for use with maternal patients.
Philips pulse oximetry uses a motion-tolerant signal processing algorithm, based on Fourier Artifact
Suppression Technology (FAST). It provides two measurements:
• Oxygen saturation of arterial blood (SpO
2
) - percentage of oxygenated hemoglobin in relation to
the sum of oxyhemoglobin and deoxyhemoglobin (functional arterial oxygen saturation).
• Pulse rate - detected arterial pulsations per minute. This is derived from the SpO
2
value, and is one
of three sources of the maternal heart/pulse rate used for cross-channel verification (see
“Monitoring Maternal Heart / Pulse Rate” on page 155).
Selecting an SpO2 Sensor
See “Accessories and Supplies” on page 179 for a list of sensors, and the patient population and
application sites for which they are appropriate.
Familiarize yourself with the instructions for use supplied with your sensor before using it.
CAUTION
Do not use OxiCliq disposable sensors in a high humidity environment, such as in neonatal
incubators or in the presence of fluids, which may contaminate sensor and electrical connections
causing unreliable or intermittent measurements. Do not use disposable sensors when there is a
known allergic reaction to the adhesive.
Applying the Sensor
1 Follow the SpO
2
sensor's instructions for use, adhering to all warnings and cautions.
2 Remove colored nail polish from the application site.
3 Apply the sensor to the patient. The application site should match the sensor size so that the
sensor can neither fall off, nor apply excessive pressure.
4 Check that the light emitter and the photodetector are directly opposite each other. All light from
the emitter must pass through the patient's tissue.
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