Chapter 7 Ecg Monitoring; Introduction; Safety Information - Gima 35134 Manuel De L'utilisateur

7.1 Introduction

The electrocardiogram (ECG) is primarily a tool for evaluating the electrical events within the heart. The ECG signals
can be detected by electrodes at the surface of the skin, this device connects ECG signals and represents them on the
monitor as waveforms and numerical value such as heart rate. The S-T segment measurement and arrhythmia
detection can be done as well by the ECG signals.
The ECG electrodes connect the patient and the lead wires and/or ECG cable, the lead wires and/or cable connect to
the monitor. The electrode type selection and the locations of the electrodes are very important to ensure accurate
ECG measurement.

7.2 Safety Information

This patient monitor can only be equipped with ECG cable and/or lead wires provided by the manufacturer;
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using those from other suppliers may cause improper performance or poor protection while using defibrillator.
Using the same type of qualified and authorized electrodes which should be within its effective life on the
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same patient. If any side-effect such as allergic or stimulus skin is found, the measurement should be stopped
at once. It is prohibited to apply the electrode to the patient with lesion and body putrescence.
To the patient with pacemaker, normally the heart rate meter does not count the pacemaker pulse due to the
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function of pacemaker pulse inhibition, but for the pacemaker with overshoot pulse, the inhibition function
may not be fully effective. So it is important to observe the ECG waveforms carefully and do NOT rely entirely
on the heart rate display and alarm system when monitoring the pacemaker patient.
The improper connection with electro-surgical unit may not only cause burns, but also damage the monitor or
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arouse deviations of measurement. You can take some steps to avoid this situation, such as do NOT use 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.
In operation mode, the monitor can be used with electro-surgical unit. The monitor's operator should ensure
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the safety of the patients if in use with electro-surgical unit in accordance with the instructions of this manual.
After the elimination of high frequency signal and high frequency electromagnetic field, the monitor can be set
to the previous operation mode within 10 seconds without losing any stored data.
Do not use the monitor with electro-surgical unit in non-operation mode, nor with large-scale electrical
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equipment such as ultrasonic, radiation and magnetic resonance imaging, which may cause electromagnetic
interference to the monitor or harm the monitor's operator.
Conductive parts of electrodes, lead wires and cable are forbidden to contact any other conductive parts
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(including ground).
This patient monitor can resist against the discharge of defibrillator and the interference from the
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electro-surgical unit. Readings may be inaccurate for a short time after or during using defibrillator or
electro-surgical unit.
Operator's Manual for Patient Monitor

Chapter 7 ECG Monitoring

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