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Chapter 15: BFA Monitoring
b) Technical alarms
Alarm
Placement of neuro sensors
or their connections might be
faulty or the impedance of
BFA
ELECTRODE
the sensors may exceed 10k
ALARM
Ω. This alarm can also be
caused by high frequency
instrument.
If the impedance of the white
or black sensors exceeds
1kΩ, the SQI will fall
gradually.
BFA SQI LOW
Artefacts can have many
causes including high -
frequency instruments,
EMG, etc.
BFA
If sensor impedance is >
IMPEDANCE
5kΩ the BFI, %BS and
%EMG will be blanked.
HIGH
BFA module is off.
BFA LINK OFF
Cause
●Check all neuro sensors and
their connections.
●Check the patient cable. If it is
not connected or is faulty, please
connect it or replace it.
● Check if either of the neuro
sensors is disconnected or
wrongly connected.
●Replace faulty sensor.
●Follow the procedure explained
in the section "Skin Preparation
and Sensor Placement" to clean
the skin.
●Check that all neuro sensors and
cables are correctly connected.
●Has the use of any mechanical
device that could generate high
frequency activity (e.g. patient
warmer) been initiated or is any
such device in close proximity to
the CSM neuro sensors?
If possible move disturbing
device away from the neuro
sensors.
●Check grounding of disturbing
device.
●Check that neuro sensors are not
dry.
●Check that the skin has been
cleaned properly.
●Follow the procedure explained
in the section "Skin Preparation
and Sensor Placement" to clean
the skin.
●Connect the module to the
monitor through interface cable.
Solution
15-13
User Manual
Explanation
Alarm level 3- the message is
displayed in cyan background. By
Pressing ALARM SILENCE,
background becomes gray and the
alarm is disabled and ignores this
fault.
Alarm level 3- the message is
displayed in cyan background. By
pressing ALARM SILENCE,
background becomes gray and the
alarm is disabled and ignores this
fault.
Alarm level 3- the message is
displayed in cyan background. By
pressing ALARM SILENCE,
background becomes gray and the
alarm is disabled and ignores this
fault.
Alarm level 3- the message is
displayed in cyan background. By
pressing ALARM SILENCE,
background becomes gray and the
alarm is disabled and ignores this
fault.
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