User's Manual

3-10 071-0774-00 Rev. A
SpO
2
Troubleshooting Guide
Clinical Situation Possible Cause Solution
No SpO
2
label is
displayed
■ SpO
2
is not enabled at the 91343 ■ Be sure transmitter DIP switch 1 and 2
are set correctly
■ SpO
2
is not enabled at the 90478
receiver
■ Be sure transmitter DIP switch 8 is
OFF
SpO
2
value displays ??? ■ Sensor not connected to patient ■ Re-attach sensor
■ Adapter cable not connected to module
properly
■ Correctly connect the adapter cable
■ Sensor not connected to adapter cable ■ Correctly connect the sensor
■ Excessive patient motion ■ Urge patient to remain still while
reading is in progress
■ Transmitter is in the initialization phase
(the first 15 seconds after sensor
application)
■ Wait until initialization is complete
■ Low battery indicator constantly
illuminated
■ Call qualified service person
Insufficient signal or
noisy signal
■ Sensor placement not optimum ■ Move sensor to a site which has better
perfusion
■ Align LED with sensor photodetector
■ Sensor placed below blood pressure
cuff
■ Move sensor to an alternate limb
Intermittent or complete
failure to operate
■ Depleted battery ■ Replace battery
■ Low battery light constantly illuminated ■ Call qualified service person
Factors that cause
significant variances in
sensor accuracy
■ Presence of dysfunctional hemoglobins
(COHb, MetHb)
■ Follow hospital procedure for
determining oxygenation in these
patients
■ Presence of intravascular dyes
(indocyamine green, methylene blue)
depending on their concentration in the
blood stream
■ Follow hospital procedure for
determining oxygenation in these
patients
■ High ambient light level ■ Reduce light levels near patient; wrap
sensor with light blocking material
■ Electrosurgical interference ■ Ultraview digital telemetry is contra-
indicated for electrosurgical use
■ Patient is significantly anemic (Hb less
than 5 gm/dl) or patient has received
large amounts of IV solutions
■ Follow hospital procedure for
determining oxygenation in these
patients