Patient Monitor User’s manual
7-1
Chapter 7 ECG
7.1 Introduction
Before mechanical systole, the heart firstly produces electrical excitement,
which results in biological current, and conducts the current to the body
surface through tissue and humour. Different potential changes take place at
various parts of the body, thus body-surface potential differences are formed.
Record the changing potential differences to form the dynamic curve, i.e. ECG,
also called body-surface ECG or regular ECG.
Through many electrodes connected with ECG cables, the monitor
examines the changes of body-surface potential caused by the heart of patient,
observes the ECG activities, records the ECG waveform, and calculates the
HR. The monitor can achieve 3-lead, 5-lead and 12-lead monitoring, and has
the function of ST-segment monitoring and arrhythmia analysis.
7.2 Safety Information
Warning:
It is imperative to only use the ECG electrodes and cables provided by
manufacturer or specified in this manual. Users shall use the electrode
which has little polarization voltage and little contact resistance.
When the electrode polarized voltage is too high, the monitor will
indicate the abnormal state by alarm system.
Before connecting the ECG cables to the monitor, please check if the
lead wires and cables have been worn out or cracked. If so, they
should be replaced.
When you are connecting the electrodes or the patient cable, make
sure that the connectors never come into contact with other
conductive parts, or with earth. In particular, make sure that all of
the ECG electrodes are attached to the patient, to prevent them from
contacting conductive parts or earth.
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