Revision C 250cx Series Maternal/Fetal Monitor 5-51
2036947-001
Troubleshooting: General Troubleshooting
Maternal Pulse Oximetry Troubleshooting
Error Log Screen
Table 22. Maternal Pulse Oximetry Troubleshooting
Problem Probable Cause Possible Solution
COMM message shown in MSpO
2
area of
display.
Communication error between the built-
in MSpO
2
module and the remainder of
the monitor circuitry.
Contact Biomedical Engineering
Department.
Dashes (– – –) shown in MSpO
2
display
area.
Monitor unable to make a determination
due to insufficient signal.
Improperly applied sensor.
Excessive maternal movement.
Excessive ambient light.
Damaged sensor
Check patient. The patient may be
experiencing shock, hypotension,
severe vasoconstriction, severe
anemia, hypothermia, arterial occlusion
proximal to the sensor, or cardiac
arrest.
Ensure that the intermediate cable is
firmly attached to the monitor and to
the sensor assembly.
Ensure sensor is not too tight. Move
sensor to another location.
Restrict patient limb movement.
Restrain limb if necessary.
Cover sensor with opaque material.
Replace sensor.
MHR/P Pulse source is blank when MSpO
2
is selected
Normal mode selected Select Fast mode on MSpO
2
Setup
screen.
REPAIR message shown in MSpO
2
area of
display. (Nellcor only)
System error or self-test failure. Contact Biomedical Engineering
Department.
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