GE Corometrics 126, Service Manual

Page: 393 / 440

Revision B 120 Series Maternal/Fetal Monitor 15-7
20155 90 -001
Troubleshooting: Fetal Pulse Oximetry Troubleshooting
Sensor Lifted icon displayed in
FSpO
2
area of display.
„
Sensor not making adequate contact at
the sensor site on the fetus.
„
Damaged sensor.
„
Assess sensor position relative to fetal
head. Assess sensor depth relative to
the fetal presenting part; advance or
withdraw the sensor as indicated in
“FSpO2 Status Icons” on page 5-20.
„
If the icon does not respond to
advancing or withdrawing the sensor,
remove the sensor and place a new
sensor, as directed in
“FSpO2 Status
Icons” on page 5-20.
Sensor Disconnected icon
displayed in FSpO
2
area of display.
„
Sensor disconnected from fetal patient
module cable; or fetal patient module
cable disconnected from monitor.
„
Damaged fetal patient module.
„
Invalid FSpO
2
sensor connected to fetal
patient module cable.
„
Ensure fetal patient module cable is
firmly attached to sensor assembly and
monitor. If connections are OK, use a
new sensor.
„
Replace with another Corometrics Fetal
Patient Module.
„
Replace with valid Nellcor OxiFirst Fetal
Oxygen Sensor (Series FS14).
COMM
message shown in FSpO
2
area of
display.
„
Communication error between the built-
in FSpO
2
module and the remainder of
the monitor circuitry.
„
Contact Biomedical Engineering
Department.
FHR slows during, or immediately after,
sensor placement.
„
Changes in intracranial pressure due to
examination could cause a reflex
bradycardia stimulus.
„
Stop the exam. Do not proceed with
sensor placement. Wait for the FHR to
return to the previous range.
Dashes (– – –) shown in FSpO
2
display
area.
„
Monitor unable to make a determination
due to insufficient signal.
„
Improperly applied sensor.
„
Excessive fetal movement.
„
Excessive maternal movement.
„
Maternal uterine contraction.
„
Damaged sensor.
„
SLOW mode selected.
„
Check centimeter mark on stylet
chamber relative to the introitus. The
sensor may have ascended or
descended independent of fetal head
descent.
„
Ensure that the fetal patient module
cable is firmly attached to the monitor
and to the sensor assembly.
„
Move sensor to another location.
„
Wait for movement to stop.
„
Restrict patient movement.
„
Wait for contraction to end.
„
Replace sensor.
„
Access FSpO
2
Setup screen and select
FAST mode.
REPAIR
message shown in FSpO
2
display
area.
„
System error or self-test failure.
„
Contact Biomedical Engineering
Department.
Table 15-4. Fetal Pulse Oximetry Troubleshooting (Continued)
Problem Probable Cause Possible Solution
)