8 - 2 Defibrillator/Monitor Operator’s Manual
8.2.2 Using CPR Filter
Performing CPR introduces CPR artifact into the ECG signal. You can enable the CPR filter to see a close
approximation of the patient’s underlying ECG rhythm when performing CPR.
To enable CPR filter:
1. Press the Main Menu button on the front panel, and then select [Others >>] → [Configuration >>] →
enter the required password.
2. Select [CPR Setup] and set [CPR Filter] to [On].
3. Enter the CPR status by either of the following ways:
◆ In the Manual Defib mode, shake and compress the CPR sensor, or select the [CPR] softkey.
◆ In the AED mode, the system automatically enters the CPR status.
After you enable CPR filter, the equipment automatically starts filtering the CPR artifact when detecting the CPR
compressions. The filtered ECG with the label “Filt.” is displayed on the second waveform of the screen.
The following figure shows the first ECG waveform and the filtered ECG waveform removing CPR artifact from
the first ECG waveform. Compared with viewing the first ECG waveform, the filtered ECG is more obvious if you
enable CPR filter.
When viewing the filtered ECG waveform, the CPR filter, the filter lead and filter gain cannot be set. The CPR filter
can be turned on/off by setting [CPR Filter] through configuration management, the filter lead and filter gain
can only be changed when you set lead and gain for the first ECG waveform.
• The CPR filter works only when you perform CPR using the CPR sensor in the AED or Manual Defib
mode.
• The CPR filter will not remove all CPR artifact. You should always follow the standard procedure of
stopping CPR to verify the patient’s ECG rhythm before making treatment decisions.
• The filtered ECG waveform must be used in conjunction with clinical signs and symptoms. It should
not be used as the sole basis for diagnosis or therapy decisions.
• There is a slight delay between the original and filtered ECG waveforms.
Original ECG
Filtered ECG
(1) ECG lead label (2) ECG waveform gain (3) CPR filter lead
(4) CPR filter gain (5) CPR filter
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