Gima 35145, User Manual

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• Signal Quality Indicator (SQI%)
SQI% measures the quality of the acquired EEG signal. The calculation is based on a number of artifacts dur-
ing the last minute. The quality is displayed numerically as a percentage (0-100%, 100%equals best signal
quality) in Display Mode A.
• Sensor Impedance
The impedance of the white and black sensors is continuously measured and displayed in Display Mode C.
Low sensor impedance values (typically between 1 and 3 kΩ) are essential for good monitor operation. A “<1
kΩ” readout means that sensor impedance is optimal.
• Sensor Alarm
The Sensor Alarm signals the interruption of reliable CSI calculation due to corrupted or interrupted EEG. This
is usually caused by the use of diathermia or a faulty sensor connection (high sensor impedance or discon-
nection of sensor leads). Should any o these situations occur, the RED Error light (2) will turn on. The CSI is not
calculated during these periods.
16.4 CSM Processes
• Operation procedure for external CSM unit:
Step 1: Prepare the skin, place and connect sensors to the CSM patient cable.
Step 2:Connect patient cable to the CSM unit and ensure that its battery is available.
Step 3: Press the Power On button of CSM unit.
Note: Always select a CSM Link ID (Serial No.) before turning on the CSM unit. When turn on the CSM unit, the
CSM unit shows a list of CSM Links found, select the one corresponding to the serial number displays on the
right side panel of the patient monitor (with the Event Key (8)), and then press the Set Event key (6) to accept
it. When link has been established the indicator Link will show a constant light.
If CSM Link connected the CSM Link serial number and software version will be shown. “- ” indicates no CSM
Link connected.
It’s strongly recommended to follow the specified steps and procedures for operation in order to obtain better
signal quality and accurate measurement result.
• Operation procedure for CSM Plug-in Module:
Install CSM Plug-in box

Clean and prepare skin

Place the electrodes

Connect lead wires
to CSM Plug-in box.
Step 1: make sure CSM Plug-in box is installed successfully
Step 2: clean and prepare skin
It’s recommended that the skin-electrode impedance should be less than 2k ohm in order to obtain good
signal quality. Before placing the sensors, the user should clean the skin with mild soap, and prepare the skin
to remove the non-conductive layer of the skin by filing off it with the sandpaper on the provided electrode.
Different skin conditions need different preparations:
Case (1): for the female with make-up
Smear the cleanser on the skin and wipe out the make-up at first, then wait for its evaporation. After that, rub-
bing the skin 2 or 3 times with the sandpaper on the provided electrode, and clean up the rest substance with
cotton or gauze. Lastly, placing the electrodes.
Case (2): for those with oily skin
Smear the Ethanol on the skin and wipe out the oily substance at first, then wait for its evaporation. After that,
rubbing the skin 2 or 3 times with the sandpaper on the provided electrode, and clean up the rest substance
with cotton or gauze. Lastly, placing the electrodes.
Case (3): for pediatric patient
Smear the clear water on the skin at first, then clean the skin with cotton or gauze. Lastly placing the elec-
trodes.
Step 3: place the electrodes
The placement of three electrodes is shown below. The advanced signal processing technique ensures that
the distance between electrodes can be as close as 2 cm (0.78 in) to get correct CSI value. However, it is
recommended to place the electrodes on the skull area with few muscle fibrils in order to obtain better signal
quality.