GE Dash 3000, Operator'S Manual

Page: 189 / 270

Monitoring Bispectral Index (BIS)
2000966-386D Dash™ 3000/4000/5000 18-5
NOTE
All changes are temporary and revert to the factory or custom defaults when the
patient is discharged. To permanently change the these settings, refer to
Defining
Custom Defaults on page 3-7 .
Disabling Continuous Lead Detection
By default, the BISx continuously checks electrode impedances. This 1 nA 128 Hz
impedance check signal may interfere with other equipment, such as evoked
Option Function
SMOOTHING Select the averaging time used to calculate BIS: The factory
default setting is 15 seconds.
„
15 SEC — Select for operating room or sedation
patient monitoring to increase the responsiveness to
changes in the patient’s state.
„
30 SEC — Select for intensive care patient monitoring
to provide a smoother BIS trend with less variability
and sensitivity to artifact.
BIS LIMITS Select the high and low alarm limits for BIS parameter. An
alarm sounds when a value occurs outside of these limits.
SENSOR CHECK Select to automatically detect sensors and display the
impedance value and status of each lead. This data is
updated every two seconds.
„
PASS — This lead passed the sensor check.
„
LD OFF — No impedance value; check the lead.
„
NOISE — No impedance value; check the lead.
„
HIGH — Re-prep the sensor.
BIS SETUP Provides access to the following controls:
„
LEAD DETECT — For more information, refer to
Disabling Continuous Lead Detection on page 18-5 .
„
EEG FILTER — For more information, refer to
Disabling the Waveform Filter on page 18-6 .
„
BIS TEST — For more information, refer to Testing the
BIS on page 18-6 .
RESUME BIS Select to initiate a sensor check when the “ EXPIRED
SENSOR ” message displays.
EEG WAVEFORM Select ON to display EEG waveform data.
EEG SCALE Select the scale of the displayed waveform. The larger the
scale, the smaller the waveform. The factory default setting
is
25 µV/DIV .
BIS RANGES Displays a description of the factory default BIS ranges.
BIS TRENDS Display the trended BIS values in the VITAL SIGNS
information window.
SPEED Select a sweep speed for the displayed waveform.