GE Corometrics 126, Service Manual

Page: 392 / 440

15-6 120 Series Maternal/Fetal Monitor Revision B
20155 90 -001
Troubleshooting: Fetal Pulse Oximetry Troubleshooting
FSpO
2
values change rapidly; Pulse
Amplitude indicator is erratic.
„
Fetal distress.
„
Excessive maternal or fetal patient
motion may be making it impossible for
the monitor to find a pulse pattern.
„
Improperly applied sensor.
„
SLOW mode selected.
„
A nearby electrosurgical unit (ESU) may
be interfering with performance.
„
Check the fetus for other signs of
distress.
„
If possible, keep the patient still.
„
Check whether the sensor is positioned
properly, and reposition it if necessary.
„
Access FSpO
2
Setup screen and select
FAST mode.
„
Check for interference from other
hospital devices. Do not use the 120
Series Monitor in the presence of an
ESU.
FSpO
2
readings greater than 85%.
„
The sensor may be facing the uterine
wall and may be reading maternal
saturation.
„
The sensor may be affected by maternal
pulsations.
„
Confirm that the sensor is positioned
properly against the fetus.
„
Ensure that the displayed FSpO
2
is fetal
and not maternal.
Patient module cannot be connected.
„
Invalid fetal patient module.
„
Damaged fetal patient module.
„
Use only a Corometrics Fetal Patient
Module.
„
Check for bent connector pins. Replace
with another Corometrics Fetal Patient
Module.
Pulse Search icon is displayed;
Pulse Amplitude appears to indicate
pulses, but there is no FSpO
2
reading
displayed
„
Fetal distress.
„
The signal quality is below the
acceptable threshold requirement
necessary to post data on the display.
„
Excessive maternal or fetal patient
motion may be interfering with signal
quality.
„
The sensor may be improperly
positioned.
„
The fetus’s perfusion may be too low for
the monitor to detect an acceptable
pulse.
„
If Searching indicator continues to
display after evaluations and
adjustments: the sensor may be
damaged; or the patient module may be
damaged.
„
Check the fetus for other signs of
distress.
„
If possible, keep the patient still.
„
Assess sensor location and determine
appropriate adjustment.
„
Replace the sensor; or try another
Corometrics Fetal Patient Module.
Table 15-4. Fetal Pulse Oximetry Troubleshooting (Continued)
Problem Probable Cause Possible Solution
( )