Mindray WATO EX-65, Operator'S Manual

Page: 137 / 276

10-5
5. Connect the BIS sensor to the patient cable. As soon as a valid sensor is detected, the
impedances of all electrodes are measured automatically and the impedance value for
each electrode is displayed in the sensor check window.
CAUTION
z
Do not attach the BISx model to the patient’s skin for a long time. Otherwise, the
BISx heats while on the patient and may cause discomfort.
10.6 Continuous Impedance Check
By default, this check is switched on. It checks:
„ The combined impedance of the signal electrodes plus the reference electrode. This is
done continuously and does not affect the EEG wave. As long as the impedances are
within the valid range, no prompt message about this check is given.
„ The impedance of the ground electrode. This is done every ten minutes and takes
approximately four seconds. It causes an artifact in the EEG wave, and the message
[
BIS Ground Checking
] is displayed during the check. If the ground electrode does not
pass this check, another check is initiated. This continues until the ground electrode
passes the check..
If the continuous impedance check interferes with other measurements, it can be switched off.
To do this:
1. Select the [
User Setup
] shortcut key and then [
BIS Module Setup >>
].
2. Select [
Cont. Imped. Check
] and then [
OFF
].
CAUTION
z
Switching off the continuous impedance check off will disable automatic prompt to
the user of impedance value changes, which may lead to incorrect BIS values.
Therefore, this should only be done if the check interferes with or disturbs other
measurements.