P1 Patient Monitor User’s Manual
8-12
【Operation】: 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 【Operation】
may suppress the QRS complexes.
【ST】: It is recommended to use in ST segment analysis.
Filter status in various ECG modes：
Drift filter EMG filter Notch Filter
Diagnose Weak Weak Optional
Monitor Moderate Moderate On
Operation Intense Intense On
ST Weak Moderate Optional
NOTE
：
Under the mode of【Operation】and【Monitor】, the state of the filter cannot be
regulated. Only under the state 【Diagnose】and 【ST】 can adjust the notch
filter status. Please select 【Monitor】during monitoring a patient, select
【Operation】under the state of great interference.
The diagnose mode has passed the distortion test.
8.5.5.4. Setting Notch Filter
The notch filter can eliminate power frequency interference. Follow the steps below
to turn the notch switch on or off:
1. Select ECG parameter area or waveform area to enter the【ECG】menu.
2. Select【Setup】submenu.
3. Switch on or off【Notch Filter】.
Filter
ECG mode
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