Mindray WATO EX-65, Operator'S Manual

Page: 139 / 276

10-7
1. Measure electrode impedance
2. Time of the most recent impedance check
3. Start/stop cyclic impedance checks
4. Show sensor information
The measured electrode-to-skin impedance and electrode status are displayed above each
electrode:
Status Description Action
[
Lead off
] Electrode falls off and has no skin
contact. Reconnect electrode, or check the
sensor-to-skin contact. If necessary,
clean and dry skin.
[
Noise
] The EEG signal is too noisy.
Impedance cannot be measured.
[
High
] The impedance is above the limit.
Check the sensor-to-skin contact. If
necessary, clean and dry skin.
[
Pass
] The impedance is within valid range. No action necessary.
Although BIS may still be measured when the electrode status is [
Noise
] or [
High
], all
electrodes should be in [
Pass
] status for the best performance.
10.9 Set BIS Smoothing Rate
Select [
Smoothing Rate
] from the [
BIS Module Setup
>>] menu and toggle between [
10 s
],
[
15 s
] and [
30 s
].
The smoothing rate defines how the anesthesia machine averages the BIS value. A smaller
smoothing rate indicates increased responsiveness to changes in the patient’s state. A bigger
smoothing rate indicates a smoother BIS trend with decreased sensitivity to artifacts.
10.10 Restore Defaults
Select [
Defaults
] from the [
BIS Module Setup
] menu. Then all the options in this menu
except [
Cont
.
Imped
.
Check
] and [
Cyc
.
Imped
.
Check
] are restored to the factory default
configurations.