Applying the Sensor
8-12 SpO
2
Monitoring
Site
Selection
• Avoid sites with impaired perfusion, skin discoloration, excessive motion
or nail polish.
• Avoid placing the sensor in an environment with bright lights (if
necessary, cover the sensor with opaque material).
• Avoid use of excessive pressure at the application site (e.g., sensor
applied too tightly, excessive adhesive tape to secure the sensor, clothing
or restraints that are too tight). These result in venous pulsations and
inaccurate measurement, and may severely obstruct circulation.
Sensor
Application
A minimum pulsatile flow must be present at the application site of your patient
to obtain measurements.
Select an appropriate sensor and apply the sensor properly to avoid incorrect
measurements. Applying a small amount of pressure at the application site can
improve the measurement. Use one of the preferred application sites for your
sensor. Selecting the most suitable sensor and application site will help you to
ensure that:
• The light emitter and the photo detector are directly opposite each other
and that all the light from the emitter passes through the patient's tissues,
• The application site is of the correct thickness for light to pass through. If
the application site is too thick or too thin, an SpO
2
NON-PULSATILE
technical alarm will occur. You should then select another site as
appropriate.
Positioning of the Light Emitter and Photo Detector
Light Emitter
Photo Detector
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