User's Manual

BIS
23-17
Last Impedance Test Not
Completed
At least one BIS element failed during the last impedance test and the test was
ended by pressing the STOP PROCED key. Repress the element that failed.
Re-test the impedance. This message will also appear if the test was ended
prematurely by pressing STOP PROCED.
Poor Signal Quality
The Signal Quality Index is poor and the numeric display blinks. Check BIS
Sensor. This may occur as a result of artifacts such as those generated from
motion or the presence of electrocautery devices.
Bad Signal Quality
The Signal Quality Index is unacceptable, therefore, the Primary Trend variable
cannot be calculated. Check BIS Sensor. This may occur as a result of artifacts
such as those generated from motion or the presence of electrocautery
devices.
Iso-electric EEG Detected
No discernible EEG activity is detected for several minutes, SR = 100. Check
the patient. Check the BIS Sensor for proper connection.
Check BIS Sensor (GND
Element)
The ground element on the patient has an impedance that is too high. Check
the Sensor and cable connections, and correct as necessary. If the message
persists, check the impedances of the BIS Sensor. Re-prep the patient’s scalp
if necessary.
Hardware Error, Service
Required
Major problems in the DSC, BIS engine or module. Requires servicing.
Table 3: Status Messages (continued)
Message User Action