User's Manual

ECG
8-15
Displaying Additional Waveforms
Multiple ECG traces can be displayed by selecting either FULL VIEW, SPLIT
VIEW, 2ND LEAD or CASCADE.
A second waveform zone can be used to display either a second ECG lead or a
cascaded trace from the first ECG zone. However, you cannot display both a
second ECG trace and a cascaded ECG trace at the same time.
Data in a cascaded ECG trace wraps from the first waveform zone into the second
to display 12-seconds of data for the selected lead. While the cascaded trace is
displayed, the text in the parameter key for the second zone displays STOP.
Touching the STOP key freezes the trace for viewing. While the display is frozen,
the text in the key displays START. Touching the key again unfreezes the trace.
Checking the ECG Amplitude
Touching the 1 mV CAL key inserts a 1 mV amplitude calibration pulse into all
ECG tracings. Use this calibration pulse as a reference to determine whether the
amplitude of the ECG waveform exceeds the minimum voltage threshold.
For ECG detection, the QRS amplitude must be at least 0.2 - 0.5 mV in an adult
and 0.15 - 0.5 mV in a neonate.
Adjusting Waveform Size
You can increase or decrease the display size of the ECG waveform. This
changes the displayed size only and does not affect the signal gain.
When you touch the 1 mV/cm key, you set the ECG waveform size to 1 millivolt
per centimeter. This standardizes the waveform to aid in accurately viewing QRS
complexes for ST segment deviation. The factory default setting for ECG
waveform size is 0.5 mV/cm.
WARNING:
• Following a lead switch and until the patient’s rate and
morphology are learned, some ECG alarms are not active.
Alarms for ventricular fibrillation and asystole continue to
be active; however, some ECG alarms (high rate, low rate,
run, couplet, abnormal per minute, and tachycardia) are
not.
!
• When displaying multiple ECG leads in the split-view or full-
view format, the waveform size of all leads is adjusted
simultaneously.
To display six traces (requires a
12-lead cable):
1 Touch ECG.
2 Touch DISPLAY FORMAT.
3 Select SPLIT VIEW ON.
To display twelve traces (requires
a 12-lead cable):
1 Touch ECG.
2 Touch DISPLAY FORMAT.
3 Select FULL VIEW ON.
To check the ECG amplitude:
1 Touch ECG.
2 Touch SIZE.
3 Touch 1 mV CAL.
To adjust waveform size:
1 Touch ECG.
2 Touch SIZE.
3a Touch the arrow keys to adjust.
-OR-
3b Touch the 1mV/cm key to
standardize.