BeneVision N Series Patient Monitor Operator’s Manual 11 - 11
• ECG signal and Pleth signal from different patient may result in incorrect signal fusion.
11.6.7 Adjusting the QRS Volume
To adjust the QRS volume, follow this procedure:
1. Select the ECG numeric area or waveform area to enter the ECG menu.
2. Select the Setup tab.
3. Set QRS Volume.
When valid SpO
2
measurements are available, the monitor adjusts the pitch of QRS tone based on the SpO
2
value.
11.6.8 Adjusting the Minimum QRS Detection Threshold
To avoid false asystole alarm due to low R wave amplitude, and to avoid tall T waves and P waves being mistaken
for QRS complexes, the monitor provides a means to manually adjust the minimum QRS detection threshold.
To adjust the minimum QRS detection threshold, follow this procedure:
1. Select the ECG numeric area or waveform area to enter the ECG menu.
2. Select the Setup tab and set Filter to Monitor.
3. Select the QRS Threshold tab.
4. Select up or down arrow buttons to adjust the minimum threshold for QRS detection. Selecting Default
resets the QRS threshold to the default value (0.16 mV).
• The setting of the QRS detection threshold can affect the sensitivity for arrhythmia, ST, QT/QTc
detection, and heart rate calculation.
• If QRS amplitude is low, the monitor might not be able to calculate heart rate and false asystole calls
may occur.
• The minimum QRS detection threshold can only be adjusted when the ECG filter is set to Monitor.