Applying the Sensor
SpO
2
Monitoring 8-11
Applying the Sensor
Sensor
Application
Safety
Information
WarningWarning
Failure to apply a sensor properly can reduce the accuracy of the SpO
2
measurement.
Loose/Tight sensor: If a sensor is too loose, it can compromise the optical
alignment or fall off. If it is too tight, for example because the application site is
too large or becomes too large due to edema, excessive pressure can be applied.
This can result in venous congestion distal from the application site, leading to
interstitial edema, hypoxia and tissue malnutrition. Skin irritations or
ulcerations can occur as a result of the sensor being attached to one location for
too long.
To avoid skin irritations and ulcerations, inspect the sensor application site
every 2-3 hours, and change the application site at least every 4 hours or
according to clinical practice guidelines.
Venous Pulsation: Do not apply sensor too tightly as this results in venous
pulsation, which can severely obstruct circulation and lead to inaccurate
measurements.
Ambient Temperature: Never apply an SpO
2
sensor at ambient temperatures
above 37
o
C (99
o
F) because this can cause severe burns after prolonged
application.
Extremities to Avoid: Avoid sites distal to BP cuff, intra-arterial line, or
intravascular venous infusion line.
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