BeneVision N22/N19 Patient Monitor Operator’s Manual 10 - 9
10.5.3.2 Changing ECG Waveform Size
If the ECG waveform is too small or clipped, you can change its size by selecting an appropriate Gain setting. To
do so, follow this procedure:
1. Select the ECG numeric area or waveform area to enter the ECG menu.
2. Select the Setup tab.
3. Select ECG gain to set the size of each ECG waveform.
4. If more than three ECG waveforms are displayed, select the More Leads tab, and then select ECG Gain to
change the sizes of other ECG waveforms. If you select Auto, the monitor automatically adjusts the size of
the ECG waveforms.
10.5.3.3 Changing Va and Vb Labels
When monitoring ECG with 6-leadwire. You can change the labels of Va and Vb leads. To do so, follow this
procedure:
1. Select the ECG numeric area or waveform area to enter the ECG menu.
2. Select the Setup tab.
3. Set Va and Vb according to the Va and Vb electrode sites. Default settings are Va and Vb.
10.5.3.4 Changing ECG Waveform Speed
To change ECG waveform speed, follow this procedure:
1. Select the ECG numeric area or waveform area to enter the ECG menu.
2. Select the Setup tab.
3. Set Speed.
10.5.3.5 Setting the ECG Filter
To set the ECG waveform filtering mode, follow this procedure:
1. Select the ECG numeric area or waveform area to enter the ECG menu.
2. Select the Setup tab.
3. Set Filter.
â—† Diagnostic: use when diagnostic quality is required. The unfiltered ECG waveform is displayed so that
changes such as R-wave notching or discrete elevation or depression of the ST segment are visible.
â—† Monitor: use under normal measurement conditions.
â—† Surgery: use when the signal is distorted by high frequency or low frequency interference. High
frequency interference usually results in large amplitude spikes making the ECG signal look irregular.
Low frequency interference usually leads to wandering or rough baseline. The surgery filter reduces
artifacts and interference from electrosurgical units. Under normal measurement conditions,
selecting Surgery may suppress the QRS complexes.
â—† ST: use during ST monitoring.
• When ST monitoring is switched on, ECG Filter is automatically set to ST. If you manually set Filter to
Monitor or Surgery, the ST monitoring function automatically switches off.The notch filter removes
the line frequency interference.
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