User's Manual

Patient Monitor User Manual Monitoring ECG
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X0.125 to make strength of ECG signal waveform of 1mV become 1.25mm;
X0.25 to make strength of ECG signal waveform of 1mV become 2.5mm;
X0.5 to make strength of ECG signal waveform of 1mV become 5mm;
X1 to make strength of ECG signal waveform of 1mV become 10mm;
X2 to make strength of ECG signal waveform of 1mV become 20mm;
X4 to make strength of ECG signal waveform of 1mV become 40mm;
Auto let the monitor choose the optimal adjustment factor for all the ECG waves.
8.3.2 Changing the ECG Filter Settings
The ECG filter setting defines how ECG waves are smoothed. An abbreviation indicating the
filter type is shown underneath the lead label on the monitor display. Filter settings do not affect
ST measurement.
To change the filter setting, in the ECG Setup menu, select Filter and then select the appropriate
setting.
– Monitor: Use this mode under normal measurement conditions.
– Surgery: The filter reduces interference to the signal. It should be used if 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 a wandering or rough baseline. In the operating room, the Filter
reduces artifacts and interference from electro-surgical units. Under normal measurement
conditions, selecting Surgery may suppress the QRS complexes too much and thus interfere with
the clinical evaluation of the ECG displayed on the monitor.
– Diagnos: Use when diagnostic quality is required. The unfiltered ECG wave is displayed so
that changes such as R-wave notching or discrete elevation or depression of the ST segments are
visible.
8.4 Using ECG Alarms
ECG alarms can be switched on and off and the changes to high and low alarm limits are just like
other measurement alarms, which are described in the Alarms section. Special alarm features
applying only to ECG are described here.
8.5 Selecting Calculation Lead
On the Normal interface, the users can select either 3 LEADS or 5 LEADS for this item. Normal
QRS complex should be:
 The normal QRS should be either completely above or below the baseline and it should not
be biphasic. For paced patients, the QRS complexes should be at least twice the height of
pace pulses.