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Chapter 15: BFA Monitoring
unconsciousness, BS value is usually 0 and it increases in deeper levels of unconsciousness. For
patients who are close to coma state, BS value is usually 75%.
SQI: Signal Quality Index
The artefact rejection algorithm ensures that the incoming EEG is not contaminated with noise.
When excessive noise is detected, the signal quality is reduced reflecting the disturbance. The
artifact rejection algorithm will be active especially when patient is awake or moves and
twinkles, and also when equipment creating external interference is used. In fact SQI value
indicates that Brain Function Index (BFI) to what extent is reliable. When the SQI is 100, show
that the EEG signal is in the best quality.
Warning
The monitor will not render accurate readings when used on patients with severe
neurological disorders and patients under 2 years of age.
Warning
The monitor will not render accurate readings when used on patients weight less than 70%
or more than 130% of ideal body weight and recent use of psycho-active medication,
including alcohol
Warning
The use of pacemakers might cause either long periods of artifacts or elevated BFI values.
Warning
The EEG signal should not be used for diagnostic interpretations and patient's clinical
assessment. This signal only is used to check status of electrodes connection to the patient.
Warning
Do not use the monitor when cardiac defibrillator is used. Patient cables are not protected
against defibrillation.
NOTE:
Operating the monitor close to equipment radiating high-energy radio frequencies
(electrosurgical/cauterizing equipment, portable radios, cellular telephones, etc.)
may cause signal disturbance. If this happens, reposition the monitor away from the
source of interference.
Warning
15-4
User Manual
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