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small ECG electrodes, choosing the position which is far away from the estimated Hertzian waves route,
using larger electro-surgical return electrodes and connecting them with the patient properly.
Conductive parts of electrodes, lead wires and cable are forbidden to contact any other conductive parts
(including ground).
This patient monitor can resist against the discharge of defibrillator and the interference from the elec-
tro-surgical unit. Readings may be inaccurate for a short time after or during using defibrillator or elec-
tro-surgical unit.
Transient caused by cable circuitry blocks while monitoring may cause artifact on ECG signals yielding
wrong heart rate reading and even triggering false alarm. If the electrodes and cable are located in proper
places according to this manual’s instructions for using electrodes, the chance of this transient occurrence
will be decreased.
ECG cable and/or lead wires may be damaged while using defibrillator. If the cable and/or lead wires are
used again, please do the functional check firstly.
When the monitor is inoperable due to overload of ECG signal or saturation of any part of the amplifier, it
will prompt “Lead(s) off” to remind the operator.
The user should ensure that no predictable hazard will be caused by the summation of leakage currents
when several items of monitor are interconnected.
When plugging or unplugging the ECG cable, be sure to hold the head of the connector and pull it out.
7.3 Preparing to Monitor ECG
7.3.1 Preparing the Patient and Device
1. Skin preparation
The quality of ECG waveform displayed on the monitor is a direct result of the quality of the electrical signal
received at the electrode. Proper skin preparation is necessary for good signal quality at the electrode. A
good signal at the electrode provides the monitor with valid information for processing the ECG data. To
ensure enough electrolyte material on the skin of patients, you need to moisten the measuring sites with
70% isopropyl Ethanol. This will usually be sufficient for ECG monitoring for a short time (30 to 60 minutes).
2. Connect the cable to the connector marked with the “ECG” icon on the signal input panel.
3. Place the electrode to the patient according to Section 7.3.2.
4. Attach the ECG lead wires to the electrode
5. Make sure the monitor is turned on and is ready for monitoring.
6. After starting the monitor, if the electrodes become loose or disconnected during monitoring, the system will
display “LEAD OFF” on the screen to alarm the operator.
• It might not display ECG waveform when using ECG cable with 3 lead wires while the setting of “Cable”
is set as “5” in the ECG parameter setup menu. Only single channel of ECG signal can be obtained while
using 3 lead wires and the “Cable” is set as “3”, this ECG signal can be selected between Lead I, Lead II
and Lead III.
• In order to obtain other Leads of the ECG signals, such as aVL, aVR, aVF and V, the ECG cable with 5 lead
wires should be used and the “Cable” should be set to “5”. At this situation, 7 Leads of ECG signal (lead
I, II, III, aVL, aVR, aVF, V) can be obtained and displayed simultaneously.
Note:
If any side-effect such as allergic or itchy reaction is found, remove the electrodes from the patients
immediately.
The symbol indicates that the cable and accessories are designed as the “CF” type level for protection
against electric shocks and with defibrillation-proof capability.
7.3.2 ECG Electrodes Placement
Electrode Placement
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